Industrial and commercial roof top centrifugal fans / upblast wall fans and roof ventilators. Sales of propeller wall and roof exhaust fan ventilators and blowers.
Canada Blower power roof ventilators - building fans

Our aluminum mushroom style CRB / CRD roof exhauster is an economical and attractive way to ventilate industrial and commercial buildings:
- Complete AMCA performance & sound certification with capacities to 35,000 CFM @ 2" WG pressure;
- Bearings life in excess of 1,000,000 Hrs on belt driven models;
- Wheather-resistant motor compartment and spun aluminum hood;
- Out-of-airstream motors;
- Overlapping centrifugal impellers and deep spun venturi minimize noise level;
- Polyurethane mesh bird screen;
- Adjustable pitch pulleys on belt drive models;
- Available accessories include: automatic or motorized backdraft damper, epoxy paint, roof curb, disconnect switch...
A wall exhaust span aluminum option: CWB / CWD fans: general exhaust units for low to medium air volumes in commercial, institutional and light manufacturing buildings;  ...centrifugal design with advantages of compact, attractive apperance, quiet operation & performance against higher static pressures;  ...wheather proof aluminum housing;  ...performance to 10,000 CFM @ 2" WG.

Mushroom roof exhaust fan: Canadian Blower

Roof Mounted Fans and Gravity Ventilators
Centrifugal Inline
Tubular, Mixed Flow and Axial Fans
Centrifugal Ceiling and Cabinet
Exhaust and Supply Fans
Utility, Centrifugal & Radial Blowers
Fume Exhaust Systems
Laboratory Exhaust Systems
Kitchen Ventilation Systems

                                                   Compact Pressure Blowers:

Canada Blower Pressure Blowers are ideal for combustion air, pneumatic conveying systems, fluid bed aeration, cooling, drying systems, and recommended to use in various high pressure fan applications.

Canada Blower Company is a Distributor of industrial process and commerical ventilation equipment. Canada Blower fans are known for the highest industrial duty quality and reliability for many years across North America.
Specific to air handling units, there are a number of ways to improve the performance of fan systems. In HVAC systems, fans use roughly 40% of all electricity. The problem is that even by following all of the proper procedures in selecting fans for HVAC use, low total efficiency persists. While a few of the fans had an efficiency between 50% and 60%, the majority reached only 33% for total efficiency.

For the most part, there is tremendous potential for improving on energy consumption of fan systems. Whether commercial, residential, or industrial fans in Canada, as much as 50% electricity could be saved with a more efficient design, as well as better strategies for control. Below are some examples of how the performance of fan systems can improve.

Variable Frequency Drive – A Variable Frequency Drive (VFD) is designed to adjust the speed of an electric motor based on load. Therefore, the motor speed is reduced and energy is saved. The exact efficiency of the VFD alone varies since the nominal output along with partial load cause the drive to lose between 2% and 5% of torque and speed. However, by implementing a Variable Frequency Drive in many applications, performance improves and energy consumption drops.

Belt Drive Fans – With a belt drive, there is a considerable loss of efficiency. The actual efficiency depends on the type of belt, complete gear adjustment, and the calculation of the belt gear. Under normal circumstances, efficiency is 90% when running at medium power, but with an incorrect gear adjustment, efficiency slips to 70% and even 60%. To boost performance, newly designed AHUs should avoid fans that are belt-driven, instead using direct driven-type fans that offer 100% transmission efficiency.

Aerodynamic Design – In a fan, dynamic pressure loss is expected. However, the aerodynamics on the fan hood is what dictates the actual amount of loss. As long as the fan hood is well-designed, it will give less dynamic pressure loss compared to a chamber.

Fan Wheel – For commercial and industrial fans in Canada, performance can be bolstered based on the type and design of the blades on the fan wheel. Efficiency up to 85%, which is the highest, can be achieved by using wheel type B. In this case, the blades curve backward. For greater airflow at smaller sizes of the wheel, a forward type wheel is often used. Unfortunately, this results in lower efficiency. In AHUs, it is important to always select backward curved fan blades.

The bottom line, the type of fan systems, as well as size, plays a key role in overall performance. For an HVAC system, the required performance of the fan includes size restrictions, airflow requirement, ambient temperature, and pressure, among other things. Therefore, the first thing you need to do is choose the right type of fan.

Typically, centrifugal fan systems in casing offer an efficiency slightly higher than fans without casing. In an AHU, there is more vulnerability to the effect of installation. Because this reduces the level of efficiency, a centrifugal fan without casing with backward curved ventilator blades provides the best fan performance.