Industrial Fans and Blowers – Canada Fans Industrial Blowers & Fans

Industrial Ventilators – High Temperature

One of the most critical components of the fan are the bearings. So naturally if the bearings are kept out of the hot airstream they are less susceptible to the effects of the high temperature, and therefore the air temperature can be higher than the limiting temperature of the bearings. Inline fans inherently have drive components in the airstream. In such cases, the unit can sometimes be designed so that cooler outside air is drawn over the drive components, providing some additional cooling. Incorporating this type of external cooling is one of the main reasons Northern Fan medium pressure tube axial inline fan (TBI) can be used for high temperature exhaust applications. There are, however, some arrangements that donÕt allow for the incorporation and benefits of external cooling. For instance, fans in arrangement 3 have the wheel suspended in-between the two bearings. Consequently, one or both of the bearings will always be located in the air stream. Similarly, direct drive fans are limited by the maximum operating temperature of the motor, since the motor is located directly in the hot air stream. That is why most often high temperature exhaust fans are required to be belt driven units; typically the motor is the temperature-limiting component of the unit when it is installed in the airstream. Other than the installation location of the bearing within the fan assembly, other critical points to consider include the type of lubrication in the bearing, as well as the construction of the bearing itself. There is a seemingly endless list of lubricants available for most any application, but the appropriate lubricant can add considerable life to bearing operation. In addition, high temperature bearings can be constructed with inherent construction modifications, such as a larger grease cavity to hold more lubricant.

Industrial Fan Design

Another common variation to the standard fan design is the addition of insulation. The bearing mounting plate, bearing cover and belt tube are the most likely components to be insulated for a high temperature application. Northern Fan automatically includes insulation for these components on all fans specified with either HT Option III or HT Option IV.

Exhaust Fans

It is important to understand that emergency smoke exhaust fans are designed to operate effectively for the temperature and time limits stated as long as the power supply to the fan is not terminated. Since they are not designed to sustain higher temperatures for continuous use, exposure to the extreme high temperatures caused by a fire likely would destroy some or all parts of the fan once the time design limit has elapsed, rendering it incapable of future operation.

High Temperature Fans

Fans that are built for continuous high temperature ventilation have many of the same construction features and options as those built for emergency smoke exhaust. For example, both are typically constructed of higher temperature ferrous materials, have high temperature bearings, have the motor and drive installed either out of the airstream or with some type of additional cooling capabilities, and incorporate some heat shielding or insulation. There are, however, some distinct differences between the fan designs for the two application categories. One of the most common applications for which continuous duty high temperature exhaust fans are specified is commercial kitchen ventilation.

Fans that are specified for continuous operation at higher temperatures need to be carefully selected taking into account air density corrections. Although a fan will move the same amount of air at two different temperatures, the static pressure and horsepower requirements can change drastically as the density of the air varies with changing temperatures. For example, if a fan moves 3,000 CFM at 70 F it will also move 3,000 cfm at 500 F. However, since the hotter air weighs much less than the 70 F air, the fan will require less brake horsepower and will create less static pressure.

There are also some accessories and construction options that are incorporated into high temperature process fans to increase the limiting temperature. For example, a heat slinger can be installed on the shaft between the fan housing and the inboard bearing. A heat slinger is an aluminum disc that absorbs and dissipates some of the heat conducted along the shaft before it travels to the bearings. Many heat slingers incorporate fans that promote additional inboard bearing cooling because it circulates air with every rotation of the shaft.

Another common construction technique is the use of a heat gap. A heat gap is a physical gap between the bearing support structure and the hot fan housing. This separation slows the process of heat conduction to the bearings and drive components through the housing and support structure. An expansion bearing should be installed where the fan shaft is predicted to conduct enough heat that it could expand to a length greater than that of the structure to which it is secured. This allows for expansion of the shaft within the bearing due to the higher temperatures.

High temperature applications can be found in many different areas of the air movement and control industry. It is important to remember that one high temperature fan design is not suited to all applications.

Additional information can be found at the Northern Fan web site http://www.northernindustrialsupplycompany.com/products/heat_exchangers.html

Oleg Cthetchel
Canadian Air Systems Engineer
airknife@cogeco.ca
Northern Fan Co.
http://northernindustrialsupplycompany.com/products/industrialfan_blowers.html
http://northernindustrialsupplycompany.com/products/ventilators.html

High Temperature Ventilators Fans

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Industrial Fan Performance

Visual inspections of the ventilation system often reveal some easily rectified problems that can significantly impair performance. If the system has not been properly maintained, clogged filters or obstructed coils will reduce airflow. The greater the obstruction, the greater the loss in airflow. Any leaks in the ductwork will contribute to reduced performance, especially leaks around plenum bulkheads that can lead to recirculation of air. Worn flexible connectors are a common source of leaks and should be inspected regularly. If the damper linkage is out of adjustment, the damper may not be opening completely, thereby reducing performance. If inlet dampers are used, make sure they are installed so that the air is pre-spun in the same direction as wheel rotation. For all dampers, make sure there is sufficient clearance for the blades to open and close completely without hitting the ductwork or other system components. Last, for systems with either pneumatic or electric controls, make sure damper actuators are operating properly. Sharp changes in the direction of airflow at either the fan inlet or outlet will disrupt the flow through the fan and impair performance. If it is impossible to straighten the ductwork entering and leaving the fan, the use of inlet boxes and turning vanes can minimize performance losses.

Industrial processes and plant ventilation

Industrial processes and plant ventilation systems often need more air than originally designed. Increased production requirements, process changes, and facility renovations are a few of the major reasons. Additionally, the lack of adequate maintenance over time can negatively impact system airflows. This article discusses several procedures that can increase airflow. Often airflow can be increased by adhering to proper fan maintenance procedures as outlined in fan installation and maintenance literature.

Centrifugal Fans & Fan Speed

Fan speed can decrease by as much as 10% to 20% when belts are too loose, with a corresponding loss of airflow. A fan cannot perform as designed if the air flow surfaces are distorted by contaminants. Even in large fans, a sixteenth of an inch of build up can reduce performance. Centrifugal fans will move some air even when running backwards. While some types would use so much horsepower they would trip circuit breakers, other design s could run for years without being detected. Fan components may be out of position due to routine cleaning or painting or the wheel could have shifted during shipment. For backward inclined fans, the relation of wheel to inlet cone is very critical. Even a quarter of an inch can have a major impact. The fan’s installation and maintenance literature shows the proper positioning of the wheel to the inlet cone.

Low Airflow Problems

One of the easiest solutions to low airflow problems is speeding up the fan. While airflow is increased by speeding up the fan, so too are static pressure, noise, and power requirements. Therefore, while increasing the fan’s speed is an easy procedure with low first cost, the additional operating expense over time makes it the most costly solution. When increasing fan speed, it is necessary to check the maximum safe speed of the fan and make sure the motor is capable of the horsepower required to run the fan at the new speed. But never run a fan beyond its maximum safe speed.

Industrial Fans & Improving Airflow

On a first-cost basis, adding or replacing fan equipment is the most costly alternative. However, on a life-cycle-cost basis, considering operating and maintenance expense, it can be the least expensive, as compared to increasing the speed of an existing fan. Sometimes a second fan may be added, either in series or parallel with the original, although it may be more cost effective to simply upgrade the system with a new fan capable of the required airflow and pressure. Adding another fan in series will increase the airflow because of the additional pressure. The operating point of the new system moves further out/up the system curve. Where duct size is adequate to handle the desired amount of air but the existing fan doesn’t provide sufficient pressure, a second fan in series may be the best solution. However, make sure the ductwork can handle the increase in pressure. Adding another fan in parallel with the first will increase airflow due to the combined capacities. Because capacities are being combined instead of pressures, a greater increase in airflow will result for a given system. However, system pressures will also increase and caution is required to avoid the unstable operating area of the combined fan system.

When more air is required it is important to investigate the system on a step-by-step basis, considering the least expensive possibilities first. For existing systems that seem to have lost performance, fan and system maintenance is the place to start. Often, simply improving the efficiency of existing components will suffice. For systems that require greater airflow and / or pressure, increased fan speed is generally the first alternative. However, when large increases in performance are required, there may be no alternative but to purchase a larger fan.

For additional information please refer to http://www.northernindustrialsupplycompany.com/burlington/request5.html

Oleg Tchetchel
Industrial Ventilating Designer
airknife@cogeco.ca
Northern Fan Co.
http://www.northernindustrialsupplycompany.com/burlington/request7.html
http://www.northernindustrialsupplycompany.com/burlington/request2.html

How to Increase Fan Performances

airknife@cogeco.ca

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olegsystems

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Industrial Fans – Types

Different models of fans are available in the market in various unique designs, integrated with the latest technologies and low power consumption facilities. The variety of elegant fans includes integrated gear box and push button switch to suit any decor.Many stylish fans with double ball bearing are available in lots of colors which are integrated with dynamically balanced blade for maximum air delivery.The use of radial blower in the fans helps in moving air perpendicular to the blower axis and provides relatively low flow rates and high pressures.

Types of Blowers & Fans

The wide range of blowers and fans includes non-decorative Ceiling fans, wall mount fans, decorative ceiling fans, single centrifugal blowers, dual centrifugal blowers, radial wheel blowers, cast aluminum blowers, high pressure blowers, belt driven blowers, explosion proof and food safe blowers, high temperature oven circulating fans, industrial fans and also stainless steel and other alloy fans are available in the market. Finest quality, durability and enduring performances of these fans are catching more attention of the market these days. A wide range of axial flow fans is designed to provide efficient trouble free service & reduce the initial and operating cost to minimum. Apart from the fans there are various other products like air blowers, air scrubbers, axial fans, axial flow fans, centrifugal blowers, cyclone seperators, dust collecting equipment, dust collector, exhaust blowers, fan blowers, industrial blowers and many more.

Non-Decorative Ceiling Fans are integrated with the low power consumption facility with double ball bearing for maximum air delivery and available at very reasonable price. Non-Decorative Ceiling Fans are high speed fans, which are available with four blades to provide maximum air delivery and best for all small rooms. Non-Decorative Ceiling Fans has variety of designs and colors available at the best competitive prices. Non-Decorative Ceiling Fans consists of power saving technologies which make it more unique and high monopoly holder in the competitive market.

Wall Mount Fans are available in sleek and stylish look with less noise and delivers maximum air pressure. Wall Mount Fans are integrated with aluminium blade coated which increases its life and also gives an elegant look to your room. Wall Mount Fans are available in many colors like Blue, Red, Brown, Cherry and lots more.

Decorative Ceiling Fans are one of the most demanding ranges of fans in the market. The aluminium body with golden touch offers a unique look and suits any decor. These days, the latest technology of power saving in fans attracts the market and consumers as well.

For additional information please refer to http://www.industrialblowerfan.com/products.html

Susanna Terlitskaia
Industrial Ventilating Engineer
Industrial Blower Fans Company
nis@primus.ca
http://www.industrialblowerfan.com/feedback.html
http://www.industrialblowerfan.com/contact.html

Fan Types

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industrialblowe

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Selecting an Industrial Fan

The air delivering capacity of axial flow fans ranges from 100 to 500,000 cubic feet per minute (3,000 to 15,000 cubic meters per minute). Impellers usually have blades with airfoil cross-sections.

Axial Fans

In an axial fan, the effective progress of the air is straight through the impeller at a constant distance from the axis. The primary component of blade force on the air is directed axially from inlet to outlet and thus provides the pressure rise by a process that may be called direct blade action.

The blade force necessarily has an additional component in the tangential direction, providing the reaction to the driving torque : this sets the air spinning about the axis independently of its forward motion.

As compared to curved sheet blades, aerofoils can apply greater force to the air, thereby increasing maximum pressure and can maintain better efficiency over a wider range of volumetric flow. Also by increasing the thickness & curvature of the inner sections, the blades can be made stiffer, this limits flutter and allows the impellers to be run at higher speeds.

Selection of a a right fan one should consider such factors like cost optimization, power rating & noise levels govern the selection of a fan suitable for a given application. Various combinations are possible to meet any given duty or operating requirements for best performance, lesser noise, power and cost characteristics.

Once the volume of airflow and the static pressure of the system are known, it is possible to specify a fan. The governing principle in fan selection is that any given fan can only deliver one flow at one pressure in a given system. To select a fan one must consider the following parameters:

– total airflow required

– total operating pressure

– fan installation space

The fan efficiency is defined as the ratio of air power (output) to shaft power requirement (input). An optimally designed fan impeller with improved aerodynamics requires less shaft input power for desired delivery of air volume with total pressure rise as per the system requirement. With reduced shaft power requirement, there is a commensurate reduction in energy consumption.

Thus the fan efficiency is directly contingent upon selection of fan and the operating point relevant to the system resistance.

The way fan impellers (blades or rotors) are designed, the amount of air they can move decreases as the pressure they are working against increases.

The airflow vs. pressure information for a particular fan is called the fan performance data. The performance of a fan depends on the size, shape & speed of the impeller. The fan performance data is essential for selecting fans as per the desired airflow and system pressure.

Most fans are tested using procedures specified by Air Movement and Control Association International Inc. (AMCA), Illinois, USA. The fan under test is mounted near the outlet of the test rig and air in-flow through the rig is varied by the movable gate assembly situated at the other end of the test rig.

The airflow through the rig is determined by measurement of the pressure differential and simultaneous readings are taken of the static pressure developed by the fan, air velocity at the exit side, power consumed by the fan driving motor etc.

Fan performance curves and data show how much pressure and airflow a given fan can produce at a given speed. This data is based on the system resistance (pressure) occurring away from the fan. Fan performance curves are developed by fan manufacturers based on the testing of a prototype fan fabricated based on the theoretical design.

The axial flow fans are widely used for providing the required airflow for heat & mass transfer operations in various industrial equipment and processes. These include cooling towers for air-conditioning & ventilation, humidifiers in textile mills, air-heat exchangers for various chemical processes, ventilation & exhaust as in mining industry etc. All the major industries use large number of axial flow fans for operations, such as :

– Power generation

– Petroleum refining & petrochemicals

– Cement industry

– Chemicals & pharmaceuticals production

– Fertilizer production

– Mining manufacturing

– Humidification in textile mills

– building Ventilation, etc..

For additional information please refer to Northern Industrial Co. web site http://northernindustrialsupplycompany.com/index.html

Oleg Cthetchel
Process Ventilation Engineer
Northern Industrial Co.
http://northernindustrialsupplycompany.com/products/industrialfan_blowers.html
http://northernindustrialsupplycompany.com/products/ventilators.html

Selection of Appropriate Axial Fan for Building Ventilation

fan vaneaxial tubeaxial blower ventilator duct inline high pressure industrial commercial exhaust booster boosting air

fan@cogeco.ca

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Axial Fans & Blowers – High Temperature

Canada Fans Co. now offers high temperature construction on its axial fans. There are a few steps of fan heat construction available: 200 F, 725 F, 800 F. High temperature inline fans are ideal for industrial oven and dryer exhaust systems where pressure requirements are minimal and compact light-weight designs are advantageous.

High Temperature Fans

200 F High Temperature Duct Fans come with special heat bearings and a belt drive with increased safety factor.

Tubeaxial Fans

650 F Tubeaxial Fan design involves special belt tunnel cooling system that induces a flow of cooler, ambient air through the belt well and inner tube, cooling the fan’s internal components. Depending on temperature requirements, modifications include high-temperature alloy fan wheel, special drive components, and modifications to provide internal ambient air cooling.

Fans with ambient air cooling systems handling hot airstreams must have sufficient airflow and be kept in operation until airstream temperatures cool below 120 F to prevent damage to the fan unit. The Tubeaxial fan ambient air cooling system is only effective while fan is operating.

Vaneaxial Fans

800 F Vaneaxial Fans are designed to operate continuously at temperatures to 800 deg. F, and include an auxiliary cooling fan that forces air through the bearing compartment and exits out through the insulated belt opening taking away excessive heat from the shaft and bearings. A high temperature shaft seal is also standard on this design.

Fans handling hot airstreams must have sufficient airflow and be kept in operation until airstream temperatures cool below 120 F to prevent damage to the fan unit. The Tubeaxial fan ambient air cooling system is only effective while fan is operating.

High Temperature Fans Specifications

The Canada Fans complete high temperature fans line now include:

– Operating up to 2200 F, centrifugal, axial and plug fan types;
– Pre-engineered and custom made fans for all types of applications with vaiety of impeller types and accessories;
– Canada Fans engineers provide a professional advice and recommend a right fan for every application & oven / plenum design;
– The fan offering provides competitive replacement fans to Garden City, Lau, IGE, Alloy Fabricating fan models; repairs, re-build & balancing;
– Unique high temperature water-cooled motors for operation up to 2300 F;

in the two major types of high temperature fans – centrifugal and axial:

Centrifugal Wheels:

* Multiblade forward curve wheel. This type of wheel is usually specified where there is a necessity for large volumes of flow against low to medium static pressure requirements. The forward curve blade is that it delivers the same volume of air as either the backward or radial blade wheel, at a lower fan speed, which is important due to wheel stresses at elevated temperatures. This fan is the most common type used in all types of heat treatment operations except where a buildup of material on the blades could occur, as wheel unbalance would result.
* Radial Blade, paddle wheel type fans. This type of wheel is usually specified where there is a necessity for medium volumes of flow against medium to large static pressures. The paddle wheel is considered a self cleaning type of wheel. It could be used where there are various materials or dust in the air stream. Due to its structurally strong design, it is used in many heat treatment applications at very high temperatures where maximum fan longevity is desired.

Axial Blade Wheels:

* The axial blade wheel is usually specified where there is a need for very large volumes of flows against low static pressure. Axial wheel like the multi-blade forward curve type wheel could cause an axial fan to deliver different air volumes at the same static pressure, if the total pressure requirement of the fan system was underestimated. This type of fan is ideally suited where a large volume of flow is required with a minimum of duct work and is used extensively for small and large furnaces, such as aluminum annealing.

For additional information please refer to http://northernindustrialsupplycompany.com/products/industrialfan_blowers.html.

Oleg Cthetchel
Canadian process air systems developer
Canada Fans Co.
http://northernindustrialsupplycompany.com/products/index.html
http://northernindustrialsupplycompany.com/manufacturers.html

High Temperature Axial Ventilators

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fan@cogeco.ca

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Industrial Fans Manufacturer & Supplier

Canada Fan sales offices are located throughout North America and manufactured around the world. Wherever you are, “We want you to enjoy doing business with us.” Leave it to Buffalo Fan to take a perfectly reliable fan and offer a quieter, more efficient, less costly alternative. Canada Fan Corporation is committed to offering a wide variety of fans to meet your needs. Please visit our link, below, to view our capabilites and vast selection of designs.

Typical Industrial Fan Applications

Typical applications include air cleaning systems, mechanical draft, chemical processes, kiln exhaust, mine ventilation, gas recirculation, sinteric and cryogenic service.

Canada Fan / Canada heavy duty axial and centrifugal fans are designed to handle applications involving erosive and corrosive gases, large capacities, high pressures and temperature extremes.

To meet these operating conditions, Canada Fan / Canada heavy duty fans are designed and selected with the use of modern computer techniques guided by over 100 years of fan engineering experience. Comprehensive testing confirms design decisions. Quality manufacturing standards guarantee long service life.

Industrial Fans & Blowers Excellence

Over the years, Canada Fan / Canada supplied fans, blowers and pumps to a wide range of industries and applications. When prolonged service wears fan wheel the logical replacement is a new fan wheel built to the original design. A technical support and sales agent will get a replacement wheel, shaft, bearings, accessories, etc. in the shortest time. She, or he may also recommend changes to extend service life and performance of your machinery, including special materials of construction, explosion-proof and spark-resistant design, variety of coatings and accessories, intended to meet practically any application needs.

Best Industrial Fans & Blowers Performance

Canada Fan air moving products are best know for “industrial quality” assuring reliable performance, relentless dependability and longevity. A staff of specially trained engineers will design a dependable fan that exactly fits customers’ dimensional and performance requirements.

Solving difficult and unique air moving problems has earned Buffalo Fan a reputation for exceptional performance and reliability. Whether it’s energy related or industrial processing or simply moving a precise volume of air, a staff of specially trained engineers will design a dependable fan that exactly fits your performance and dimensional requirements.

Canada Fans are sold and serviced by air movement professionals. We can help you explore your needs and will be pleased to work with you.

Additional information can be found at the Northern Industrial web site http://northernindustrialsupplycompany.com/products/ventilators.html

Oleg Cthetchel
Air Process Systems Engineer
canablower@cogeco.net
Canada Fan Co.
http://northernindustrialsupplycompany.com
http://northernindustrialsupplycompany.com/burlington/request6.html

Canada Fan / Canada

airknife@cogeco.ca

Oleg Tchetchel

ventilator,fan,blower,centrifugal,axial,radial,pressure blower,high temperature,high pressure,PRV,propeller,industrial,building,ventilation,ventilating,high volume,air,circulation,circulating,wall,roof,exhaust,supply,wheel,blade,impeller

chicagoblower

chicagoblowerc

fan@cogeco

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Industrial Fans – Chemical Industry

Biomass boiler packages service the wood industry—burning waste products ranging from excess wood, wood chips, coconut husks, or even cocoa bean shells to create steam that can then be used to generate power. Fans serving these types of industrial applications need to have a rugged construction to be able to handle the harsh operating environment introduced by the high-temperature biomass boilers, and Canada Fans fans continue to stand up to the test. All housings are continuously welded using heavy gauge, reinforced steel, and suitably braced to prevent pulsation. Wheels and blades are manufactured with a heavy-duty, robust design.

Radial Blade Fans

In addition, the range of products used in the boilers means that the fans must handle often-dirty airstreams. In these cases, straight radial blade designs are used to alleviate the potential operational problems that can be caused from buildup on the blades from materials coming through the fan. Canada Blower also understand the importance of designing a product that could meet the needs of varying climates and other environmental challenges. Canada Fans fans are designed to be prolific throughout the word, from varying climates in South America, Europe, Canada, and all throughout the U.S. to ensure uninterrupted, consistent operation.

Canada Fans has the engineering and manufacturing capabilities to accommodate virtually every conceivable application,after completing thousands of successful installations worldwide and have a proven track record for tackling the most technically complex and unique applications. Buffalo Fan offers a great breadth of products and quickly adapting to the needs of the customers.

The petrochemical industry utilizes fans in many different areas of the plant. Each of these custom applications requires quality fans designed for durability, ease of maintenance and dependability. Some of the areas where fans are used include forced draft fans and induced draft fans. Canada Fans has extensive experience providing air movement solutions involving all areas of petrochemical processing, and has worked with numerous companies throughout the United States and worldwide, serving more than 60 petrochemical facilities and counting.

Canada Fans provides fan testing and validation services at the in-house laboratory, as well as on-site. We also offer scheduled maintenance, including balance, alignment and operational training. Canada Fans services and repairs all brands and types of fans. The fan services offered is an extension of Canada Fans’ commitment to provide the customers with the highest level of service and support.

Canada Fans and its assotiated companies have vast experience in meeting the extremely stringent requirements of the American Petroleum Institute (API). With engineers sitting on the API task force, project management, test procedures and worldwide installations, Canada Fans has the experience and expertise to meet the API 560 and 673 specifications without exceptions. Typical requirements are:

• Fan sleeve bearings, wither anti-friction or hydrodynamic
• Constant level oilers
• Single or double carbon ring shaft seals
• Corrosion resistant shaft sleeves with strict runout tolerances
• Heavy-duty inlet silencers with minimum 15′ height requirements
• NDE-Dye penetrant inspection of rotor welds
• Fan mechanical run test & performance shop test

Special features of chemical duty fans are:

• Cast iron access doors
• External linkage radial vane damper
• Tubular base
• Lateral & torsional analysis complete to the bottom of the sub base

Canada Fans is an industry leading designer and manufacturer of the highest quality industrial fans throughout the world. Our products are known for their rugged construction and reliable operation. Canada Blower offers unmatched flexibility and fan customization, coupled with superior service before and after the sale. Canada Blower also have the capability to provide parts and service for products not manufactured by Canada Blower Co.

For additional information please refer to http://www.canadafans.com

Susan Terlitski
Designer of Industrial Process Ventilation Equipment
canadablower@canadablower.com
Canada Blower
http://www.canadablower.com/inquiry/index.html
http://www.canadablower.com/fans/index.html

Fan / Blower for Chemical Industry

canadablower@canadablower.com

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buffaloblowercom

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Industrial Blower Fan Types

Wide range of blowers and fans

Wall Mounted Fans

Susanna Terlitskaia
Industrial Ventilating Engineer
Industrial Blower Fans Company
nis@primus.ca
canadafans.com

Fan Types

nis@primus.ca

Industrial blowers

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Power Roof / Wall Exhausters

To do a satisfactory job of eliminating excessively hot air, it is usually essential to have powered wall and / or roof exhausters. These fans should also help to control air pressure within the building whether it be negative or positive pressure. The most effective way to incorporate wall or roof exhausters into a system will be discussed below. A large number of buildings use exhaust fans and/or power roof ventilators to exhaust fumes, smoke, dust or other contaminants unavoidable in the operation of the business. As a result, these buildings are frequently under a severe negative pressure. This condition can create problems in many areas of operation. Examples are: (1) reduced efficiency of exhaust systems that are working against each other; (2) down drafts in flues, that may extinguish pilot lights and cause explosions and tire; (3) severe drafts around windows, doors and other locutions when air seeks to enter the structure. The solution to problems of this kind is usually found in the use of supply fans or “make-up” air ventilators. During the hot weather period, these fans become a valuable source of fresh, cooler, outside air to replace the superheated air being exhausted. If they arc correctly sized and coordinated with the exhaust fans, an effective ventilation system may be achieved.

Industrial Fans for Ventilation

A work stoppage or strike may occur if the problem of personnel discomfort is unresolved. The benefits from a solution to such a situation are enormous. In plants where there is a high density of employees and many manual operations involved, an improvement in the environment can produce substantial benefits in terms of increased production, reduced errors, and a decline in complaints and absenteeism among employees. In other circumstances, the attentiveness of an audience or student group may be a factor that spells success or failure for the project. There is a Buffalo Fan case history where a high ambient temperature had actually reduced the capacity of a big power turbine. To obtain rated performance by the machine, an improvement in the room ventilation and cooling system was necessary. When this was accomplished, the plant management was amazed to find an equivalent improvement in the efficiency of the employees who were required to work in this same environment with the machine.

Roof / Inline Exhaust Fans

If the exhaust and supply air requirements of a building have been carefully engineered and installed, and there continues to be a high instance of worker discomfort, the problem usually relates to the matter of air circulation. Typical examples of worker discomfort are found in areas where exhaust fans are roof mounted and air supply is through windows and wall openings. Air flow is generally from the window opening to the nearest roof exhauster. The cooling effect on the individuals in the area is negligible. To be effective, air flow must be at or near floor level. In this way, occupants obtain maximum benefit from the fresh, cooler air; they receive the added comfort of air circulation over their bodies and they are not adversely affected by the superheated air being exhausted from the building.

For additional information please refer to http://www.canadablower.com/index.html.

Susan Terlitski
Canadian air systems engineer
Canadian Blower
canadablower@canadablower.com
http://www.canadablower.com/blowers/index.html
http://www.canadablower.com/fans/index.html

Commercial Ventilators and Fans

canadablower@canadablower.com

commercial fan,commercial ventilator,roof fan,roof ventilator,wall fan,wall vebtilator,air supply,air exhaust,power fan,power ventilator

buffaloblowercom

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Exhaust Fans

The practical designs of modern homes are more focused on energy conservation. Making a home practically air-tight reduces heating requirements thus saving on electricity costs. This may be a great way to save money and help the environment, but it also leads to poor air circulation inside the house. Poor air quality can lead to a variety of cardiovascular diseases, ruined paint and damaged furniture which is why it is important to have good air circulation inside the home. The best way to do this is to install ventilation exhaust fans.

Types of Exhaust Fans

There are many different types of exhaust systems and getting an idea of how each one works will give you an idea of what type will be the best for your home. Different sized homes will have different ventilation requirements. Larger homes will require a variety of ventilation fans to keep the air from getting stale.

Wall Mounted Exhaust Fan Systems

The most common types of ventilation air purifying fans are wall mounted, ceiling mounted, inline fans, combination, exterior remote mounted and kitchen range exhaust fans. It is best to have ducting installed in areas where a visible fan would not blend in well. Areas like the living room, dining room, den and bedrooms would be good places to have ducting installed. Stale air runs through the ducting and exits the house via an exterior fan that expels the air outside, or busing using inline fans that are contained inside the actual ducting.

Ceiling or Wall Mounted Exhaust Fans

Kitchens, attics, laundry areas, bathrooms, garage and storage areas can be installed with either ceiling mounted or wall mounted exhaust fans if the area is situated beside an exterior wall.

It is important that all the areas inside a home need to have air circulation so that pollutants, pathogens or even humidity does not accumulate and lead to costly repairs or health problems. Be sure to select ventilation exhaust fans that are suitable for each area of the home.

For more information about proper building ventilation please visit the ABB Blower company web site http://www.fanblower.com/motor_cooling_fan.htm

Susann Terlitski
Designer of Industrial Air Handling Units
Fan and Blower Co.
abbblower@abbblower.com
http://www.fanblower.com/axial_flow_fan.htm
http://www.fanblower.com/inline_fan.htm

Exhaust Fans

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