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Fans and Blowers
Other HVAC Products
Canada Blower Co. offers a PT Power Tube Make-Up Air System as one of
the most economical options for larger industrial plants ventilation
air make up.
When exhaust fans are used to provide ventilation, both for industrial
and process exhaust and personnel comfort, a negative air pressure is
created within the building. This negative pressure causes several
- Process exhaust ventilation systems are less efficient and may not
- Down flow can occur through gravity vents and result in the back
venting of products of combustion from flues and stacks of heaters and
- Drafts are created that are a discomfort to employees. Safe operating
of outside doors may even be impaired.
Canada Blower Power Tube Fan Make-Up Air System solves all of these
problems economically, even on the coldest winter day.
In the winter, conventional make-up air systems have to heat the cold
outside air prior to introduction into the building. This is an
expensive process in both equipment and continuing energy cost. The
Power Tube Fan Make-Up Air System is a simpler system that utilizes
wasted building heat and basic aerodynamic principles for supplying,
tempering and distributing make-up air. And that makes it less
expensive than conventional make-up air systems to purchase, to install
and to operate.
PT Power Tube Fan Make-Up Air System uses a special propeller fan with
straightening vanes and fan housing mounted to an opening in a building
sidewall near the ceiling (an optional roof mounting model is
available). A motor operated wall shutter is attached to the outside
wall opening under a protective weather hood. A long specially
constructed reinforced polyethylene tube is connected to the fan
discharge orifice to carry fresh outside air throughout the building
and temper it by mixing cold outside air with warm inside air near the
plant ceiling before it reaches floor level.
Specially sized and spaced discharge holes in the polyethylene tube
produce relatively high velocity turbulent jets of air. This turbulent
jet flow swirls and mixes surrounding air particles resulting in the
entering of the warm ceiling air and the complete tempering of very
cold outside air within a relatively short distance. The result is
heated make-up air at the price of unheated make-up air.
Power Tube Make-Up Air Fans are available in Sizes 18 to 48 for for air
flows up to 40,000 CFM.
Canada Blower PT Power Tube Make-Up Air System tube is constructed of
thick woven high density polyethylene fiber (8 x 8) laminated with poly
coating to a thickness of 6 Mils. It is 3.8 oz. per square yard
material. Burst strength is 118 Lbs per square inch. The material is
flame retardant and complied with NFPA Standard 701. Tubes are
available in two colors: blue and white. One end of the polyethylene
tube is factory sealed.
Sufficient make-up air should be provided to balance exhaust from
general ventilation and process ventilation. Usually several Power Tube
Fans will be required, located to distribute air throughout the plant.
If additional tempering of make-up air in specific plant areas becomes
necessary, unit heaters can be added.