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

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.












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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.
Double-Width Centrifugal Fans combine the efficiency of airfoil wheels with construction features to suite industrial supply and exhaust systems as well as heating, ventilating and air-conditioning applications. A wide range of accessories is available to taylor Double-Width Airfoil Fans to each unique application.

With pressures to 15" WG and volumes to 500,000 CFM, together with up to 85% efficiencies, the range of NIS-CO DWDI-ACF Fans covers the most industrial HVAC systems needs and typical full-range air-handling units designs.

NIS-CO Wouble-Width Airfoil Fans offer:

* Stable performance - completely stable pressure curve from wide-open to closed-off... ideal for variable air volume systems.

* Non-overloading horsepower curve - horsepower reaches a peak and then decreases as flow increases... allow calculation of the maximum brake horsepower at a given fan speed so a motor can be selected that will not overload if system pressure changes.

* Efficiency - the mechanical efficiency curve offers a broad selection range with little hprsepower variation.

* Sound - the superior efficiency of the Airfoil wheel provides a low sound level over a wide performance range.