Industrial building ventilation fans and blowers, power wall and roof ventilators for air makeup and exhaust. Sales of industrial wall and roof propeller fans.
Canadian ventilator & fan

Sale of TCF NYB fans / blowers, American Coolair ventilators, Aerovent ventilators / fans, side channel blowers, regenerative blowers, Canarm ventilators, ACME fans, Leader Delhi fans, ILG ventilators, Plastec propylene blowers, New York Ventilators, confined space fans and ventilators.

HVAC design engineers face many choices throughout the planning process, perhaps few as crucial as that of fan equipment, a principal consumer of energy. This article will discuss options for improving energy efficiency when designing an HVAC system and selecting a fan.

Flow rates are predetermined based on space type and occupancy. Although local codes determine minimum requirements for HVAC systems, ASHRAE Handbook - HVAC Applications provides general design criteria for various commercial and public buildings. These criteria include air movement, room circulation, noise, and filter efficiency. Although all are important, room circulation, in air changes per hour, typically determines airflow requirements. Because flow rate is driven by design criteria, a design engineer's primary means of reducing energy use is to minimize the static pressure needed to move air through a system.

Air Movement and Control Association (AMCA) International defines system pressure loss as "the sum of the static-pressure losses due to friction, shock, dissipation of velocity pressure at the system discharge, and the static-pressure differences between the entry and discharge openings of an air system. The static pressure a fan must overcome is dependent on many variables, only some of which the design engineer can control. The location of equipment often is determined by the architect and, therefore, limits the engineer's options.

Duct configuration and fittings used to connect components are large contributors to static pressure. Other sources of system pressure loss are balancing and control dampers, variable-air-volume (VAV) boxes, diffusers, louvers, coils, filters, and other components in an air stream. Given that velocity pressure is proportional to the square of velocity, pressure loss in most of these components is proportional to velocity squared. This makes size an important factor, as cross-sectional area dictates fluid velocity. For example, reducing air velocity throughout a system by 10 percent would result in a 20-percent reduction in system static pressure. With air power proportional to pressure, this would equate to a 20-percent reduction in energy consumption.

In addition to accounting for all static-pressure loss in a system and achieving required room airflow, a design engineer must adhere to Section 6.5.3 of ANSI/ASHRAE/IESNA Standard 90.1, Energy Standard for Buildings Except Low-Rise Residential Buildings, which limits the power (horsepower) a fan can consume per cubic foot per minute of airflow the fan generates. With flow requirements defined, a design engineer must limit system static pressure to meet this power limitation.

A major contributor to energy consumption that often is ignored is system effect. AMCA International defines system effect as "a decrease in fan performance capability, observed as a pressure loss, which results from the effect of fan-inlet restrictions/obstructions, fan-outlet restrictions, or other conditions influencing the performance of the fan when it is installed in a system."2 System effect is a reduction in a fan's ability to generate pressure and can be looked at as an additional system pressure loss. It can lead to underperformance, excessive noise, and vibration in a fan and system.

System effect can be described by its impact on a fan curve. Fan curves are produced from laboratory testing, with fans configured for ideal installations. Testing is performed in accordance with ANSI/AMCA Standard 210-07/ANSI/ASHRAE Standard 51-2007, Laboratory Methods of Testing Fans for Certified Aerodynamic Performance Rating. A fan curve displays performance for a constant speed (revolutions per minute) in terms of static pressure vs. volumetric flow rate. In Figure 1, the intersection of the system-resistance curve and the pressure curve is the operating point of the fan. To move along the system curve to alter fan performance, one must increase or decrease fan speed accordingly. Operating power is where the power curve intersects with a vertical line running through the operating point.

The ideal inlet and outlet conditions under which fans are tested rarely are seen in the field. As a result, a fan will overperform or underperform in terms of flow rate, static pressure, or both. In Figure 2, a suitable fan was selected, but system effect was ignored. The blue lines represent how the fan would perform under AMCA International test conditions. Actual measured performance is indicated by the red dot. The red line shows how the fan would perform in an AMCA International air test when operating at design speed, but takes into account system effect. The only way to achieve the desired performance is to speed the fan to the rate designated by the green line. The consequence is a higher operating speed, higher brake horsepower, and higher sound levels.

Another key to reducing power consumption is fan selection. Generally, propeller or tube-axial fans are more efficient for relatively low static pressures, while centrifugal-type fans are used for relatively high static pressures. Too often, fan selection is based solely on first cost. The consequence is that a relatively small-diameter, high-speed fan is used. A small fan operating at a high speed generally requires more operating power and produces more noise than a large fan operating at a low speed.

Most of the energy lost in a system is converted to heat. For example, mechanical and electrical energy losses in a fan motor raise the surface temperature of the motor. If the motor is in an air stream, the heat will be transferred directly to the air.

Engineers of alloy pressure blowers, pressure blowers with high temperature construction, stainless steel, aluminum, and fabricated steel construction. Supply of replacement centrifugal fans, centrifugal blowers, and parts for centrifugal fans, and centrifugal blowers manufactured by Buffalo Blower in New York, Twin City Fan, Northern Blower, Chicago Blower, Sheldons, Cincinnati Fan, Hartzell, IAP, Industrial air products, Canadian Blower, Howden Buffalo, Penn Ventilation, Penn-Barry, Barry Blower, ACME, Aerovent, Alphair, American Fan, Lau Industries, Clarage, Delhi, Canarm, Leader Fan, Daltec, ABB, Flakt, Flaktwoods, Woods, MK Plastics, Robinson Industrial, Garden City Fan, Loren Cook, Jen-air, Jenn Fan, Aeroflo, Grainger, Greenheck, Kice Fan, ILG Industries, Canada Fan, Industrial Air, Ceilcote, Breidert, Anderson 2000, Solar & Palau, Strobic air, Trane, TCF Axial, Aerovent.

GRAVITY VENTS manufactured by experts!

Hoods, Loverline Enclosures and Gravity Ventilators for exhaust relief, or fresh air intake ventilating systems are predesigned based on the required airflow capacity.

Exhaust Relief Vents are designed to have a 1 to 1 ratio of hood perimeter opening to throat area. Normally used as exhaust relief vents, have built-in bird screen.

Intake Relief Vents are designed to have a 2 to 1 ratio of hood perimeter opening to throat are to provide an inlet velocity not to exceed 650 fpm. Available with 1” or 2” aluminum filters. Could be used for air exhaust as well.

Louvered Aluminum Hoods and Gravity Ventilators are supplied with continuously welded metered corners. The construction itself is supported by reinforced structural frame. All fasteners are aluminum. Trimline birdscreens are made of galvanized wire mesh as standard. All models are available in standard , or custom sizes.

Available Accessories include: Aluminum Filters, which are available in 1”, or 2” thickness and are of removable permanent type, horizontal mounted in perimeter opening of the hood; Extra Strength Construction is provided by extra reinforcing to withstand 100 mph winds; Insect screens are available to ease job usually done by filter packages; Hinged Hood option is available to allow easier access to the filter package; Extended Throat Height is provided for additional hood height above roof line; Prefabricated Curbs are of galvanized steel continuous welded construction, available as self-flashing type, or roof-over-flashing type, provided acoustically lined and thermally insulated with fire retardant fiber fire; Decorative coatings available in two coat system; protective coatings for corrosion applications, such as Epoxy, Eisenheiss, Heresite, and others; Stainless Steel, All Copper, All Aluminium construction are available upon request.

Louverline Penthouses are designed to envelope roof top mounted equipment . The dimensions and construction are selected according to the equipment dimensions and air requirements.

Spun Aluminum Gravity Ventilators are designed to provide low silhoette architectural exhaust / relief ventilator, or fresh air supply gravity vent for commecial and residential applications.

All models wall fans bear the AMCA Certified Ratings Seal.

Canada Blower Fan Company offers:

Adjustable Pitch Fans
Axial Fans
Vane Axial Fans
Fixed and Adjustable Pitch Tube & Duct Axial
Centrifugal Fans
BCDW Fans
Turbo Pressure Blowers
Pressure Blowers
In-Line Fans
BC Utility Fan Sets
BC Swingout Fans
Cool Blast Utility Ventialtors: Portable – Pedestal – Stationary
Fiberglass Axial Flow Fans - Belt & Direct Drive
Wall and Duct Fans
Bifurcated Blowers
Fiberglass Centrifugal Fans
Radial Blowers
Industrial High Pressure Blowers
BC Utility Fan Sets
Inline Fans
Fiberglass Roof Ventilators - Centrifugal Direct & Belt Drive
Centrifugal Up Blast & Down Blast Fans
Propeller Fans - Direct & Belt Drive
Propeller Up & Down Blast Ventialtors
Power Roof Ventilators - Direct & Belt Drive
Up Blast and Down Blast Ventilators
Recirculating Fans
Hooded Intake Fans
Propeller Fans and Wall Ventilators
Gravity Exhaust Vents
Demand Ventilation Controls
Axial Roof Mounted Ventialtors
Axial Wall Mounted Fans
Ceiling and Inline Ventialtros
Industrial Centrifugal Down Blast Roof Fans
Industrial Centrifugal Up Blast Roof Ventialtors
Warehouse Destratification Fans
Inline Centrifugal Blowers
Utility Sets
Untempered Gravity Intake Fans
Untempered Fan Intake Ventialtors
Tempered Fan Intake AHUs
Kitchen Exhaust Hood Fans
Ventilation Hood Fans
Make Up Air Plenums Ventialtors
Kitchen Ceiling Diffusers & Fans
Grease Duct Fans
UL Listed Fire Suppression Ventilators
Fan Hood Filters
Pollution Control Fan Units

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Quick delivery of portable ventilation blowers, ventilating fans, industrial centrifugal exhaust fans, heavy duty exhaust ventilators, duct fan blowers, high pressure pressure blowers, restaurant kitchen exhaust fans UL762 / UL705, squirrel cage ventilators, garage exhaust fans, dust collection fans, shop exhaust ventilators, blow off pressure blowers, fune exhaust fans, ventilator blades, oven ventilators. Designers of air tight sealed blowers, stainless steel, aluminum and special alloy fans, super high pressure centrifugal, regenerative, side channel and multi-stage blowers, high volume ventilators.
Canada Blower forced draft fans fluidize and cool gravity conveying units. Dry material bulk density determines the amount and pressure of fluidizing air required. Canada Blower fans are supplied with inlet filters to avoid contamination of the product stream. Because the pressures required to fluidize the granular materials are usually more than one PSIG, the fans may require inlet silencers. The most common fan design is usually a direct drive arrangement with the motor being coupled directly to the fan wheel. Volume control can be affected by fan damper control. Some HVAC designers specify motor frequency control to create energy savings.

Canada Blower bearings and motors isolated from the process. Blower shaft seals with ceramic felt elements + housing clean out door + safety guards and electrical disconnect are standard; as well as ambient air fan inlet filter and blower silencers.