Roof Fans - Industrial Upblast Power Roof Ventilators Canadian Blower

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Chicago Blower Canada fans blowers and ventilators: Canada Blower

ROOF VENTILATORS

Roof ventilators provide cost-effective general purpose ventilation of commercial buildings as well as a large variety of industrial applications. Belt and direct drive models are available with adjustable pitch cast aluminum impellers or fixed pitch impellers constructed of fabricated steel or cast aluminum to meet specific application requirements.

Canada Blower Air Supply Roof Ventilators offer an efficient and convenient way for air make-up in industrial and commercial buildings:

- Complete AMCA performancece & sound certification with capacities to 100,000 CFM @ 2" WG

- Galvanized steel weather hood and housing;

- Choice of aluminum or steel propeller;

- Optional 2" removable and cleanable filter;

- Direct driven and belt driven models;

- Delay switch opens a motorized damper before fan motor starts - to avoid motor overloading;

- Available accessories : motorized damper, bird screen, special coatings for extra protection, factory wired disconnect switch, roof curb...

Industrial Canadian Blower up-blast power roof ventilator fans,

Canada Blower’s direct drive axial flow marine fans and blowers are specifically designed for rugged marine environments. Fan housing lengths are shorter than our standard axial flow fans to minimize installation space. Housings are constructed of heavy steel plate (1/4″-3/8″) to permit hot dip galvanizing for corrosion resistance against salt laden marine environments. In addition, impellers are cast in one piece for extended durability. All of our marine duty fans are certified by the American Bureau of Shipping (ABS) and have earned product type approval.

Typical Applications:

– Machinery Ventilation
– Cargo Hold Ventilation
– Engine Room Ventilation
– Heating and Air Conditioning Systems

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Proper ventilation requires that there be a movement or circulation of the air within the space and that the temperature and humidity be maintained within a range that allows adequate evaporation of perspiration from the skin. It was formerly believed that the discomfort, headache, and lethargy commonly associated with poor ventilation were caused entirely by the increase in the amount of carbon dioxide and the decrease in the oxygen content of the air. There is evidence to show, however, that the deleterious effects result largely from interference with the heat-regulating mechanism of the body. Lack of air currents and the increase in relative humidity and temperature (especially noticeable in crowded, poorly ventilated places) prevent normal evaporation of perspiration and loss of heat from the surface of the skin.

A simple roof ventilator is essentially an opening in the roof with a cover to keep out rain and to prevent winds from interfering with its functioning. Natural convection is an appreciable aid to ventilation in a large building only if it contains sources of large amounts of heat. A further useful adjunct is a fan fan, device for agitating air or gases or moving them from one location to another. Mechanical fans with revolving blades are used for ventilation, in manufacturing, in winnowing grain, to remove dust, cuttings, or other waste, or to provide draft for a fire. The addition of distribution ducts to the fan and a system for forcing air into the building provides greater efficiency. Outlets are designed to attain maximum mixing of air and to move large amounts of air at low velocity so that temperature layers are eliminated. Factories have special suction hoods and enclosures to draw away localized dust, fumes, and heat. Incoming air may be cleaned of dust by filters or electrostatic precipitators.

Natural ventilation depends on winds outside and convection currents inside a building. Winds raise air pressure slightly on the windward side of a building and lower it slightly on the lee side. The pressure difference promotes circulation into the building on the windward side and out of it on the lee side. Convection currents are caused by the sinking of colder and therefore heavier air, which displaces the warmer air. A building may have a roof ventilator to allow the rising warm air to escape. If there is an opening to the outside at the bottom of the building, fresh, cool air will be drawn in.

Deep mines, underwater tunnels, and other subterranean and submarine environments require elaborate mechanically operated systems for maintaining the air supply in a healthful condition. The lives of those working in, or traveling through, such areas depend upon a constant supply of fresh air; not only must the systems used be highly efficient, but there should be provision for emergencies in case of failure of the apparatus in operation. An outgrowth of studies of problems of ventilation is the development of methods of air conditioning heat pump is a reversible device that does mechanical work to extract heat from a cooler place and deliver heat to a warmer place. The heat delivered to the warmer place is, approximately, the sum of the original heat and the work done.

Such systems, unlike ordinary methods of ventilation, are independent of outdoor atmospheric conditions and can, therefore, maintain the indoor atmosphere at the most healthful temperature and humidity and can free the air of dust and other undesirable materials. They accomplish this, however, at a considerable cost in energy.

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