Direct-drive and belt-drive wall fan is is available in centrifugal wall fan construction and axial-prop fan construction. This is an extremely quiet general exhaust, or supply fan. When supplied with filter package it is used as ambient make-up air fan. Recommended for industrial and commercial applications such as stores, laboratories, offices, agricultural green houses, warehouses, industrial buildings; and in public meeting areas such as churches, auditoriums and theatres for the removal of large volumes of air with low power output. Designed for ease of maintenance and low operating cost combined with quiet operation and low visibility. Available ventilator sizes vary from 6 to 84 inches of diameter of the fan prop. Fan capacity: up to 105,000 CFM. Static pressure: up to 2.5 inches of WG.
Wall fans construction features a heavy gauge steel panel with steel frame supports and deep-spun venturi orifice. The Q-wheel is designed for applications where exceptionally low sound levels are required. Four and six bladed die formed fixed pitch propellers are statically and dynamically balanced and are designed for general ventilation applications. Cast aluminum adjustable pitch fan propellers are intended for industrial air ventilation applications and allow for flow adjustment.
Drive mechanism Direct drive models have propeller connected directly to the motor shaft for minimal wear and maintenance. Belt-drive ventilator models are equipped with standard fixed, or adjustable single and multiple belts, with variable pitch cast iron pulley for adjusting fan speed. A motor slide base allows for belt tension adjustment. Belts are oil resistant and are not static conducting. Heavy-duty pillow-block bearings with cast iron housings are self-aligning and relubricable , with zerk fittings with extended bearing lube lines. Motors are of totally enclosed (TEFC, or TEAO) type. Explosion proof fan motors, severy duty motors, IEEE841 motors, mill and chemical duty motors, and special motors are available upon request. All motor brands are UL and CSA certifed and serviced worldwide.
Options and Accessories: Fan Wall Housing / Wall Cabinet / Wall Sleeve of galvanized steel is available for convenient mounting and proper spacing of shutters. Automatic and Motor-Operated Shutters are recommended for weather protection and to prevent backdraft when power supply is off. Motorized shutters are available for opening/closing action on all air supply applications. Safety Guards are available in motor-side configuration and blade-side configuration. Safety cage is available for total enclosing of the panel fan. All safety guards meet OSHA requirements. Special protective coatings and alloys (aluminum, or stainless) are available upon request. All wall fans have epoxy coating as a standard. Safety Disconnect Switches cut power to motor for servicing of the unit. They are mounted adjacent to fan panel. Fan speed controller provides capability to change performance and speed ranging from 0 % to 100 % of fan capacity for fine-tuning and balancing of the ventilation system.
All models wall fans bear the AMCA Certified Ratings Seal.
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The size of the blower may be regulated by the size of the environment in which it is to be operated. For instance, some units are big enough to house both the fan and its power supply. Smaller, portable blowers are mainly used for cleanups and in spaces that require temporary circulation or air transfer. Industrial blowers are manufactured using a range of durable plastics and metals, or a combination of both materials. For example, industrial blowers operating in corrosive environments are usually made of polypropylene because it provides greater structural integrity and corrosion resistance, and will never de-laminate. Typical recommendations in the construction of industrial blowers are - fiberglass for temperatures above 220 degrees, and metal if pressure is above 10 w.g. (water gage). In a modern office building, the heating ventilation and air conditioning system is designed to keep occupants comfortable and healthy by controlling the amount of outside air that is added to the building atmosphere, filtering both incoming and recirculated air to remove particulates and controlling the temperature. The HVAC system includes all heating, cooling, and ventilation equipment serving a building: furnaces or boilers, chillers, cooling towers, air handling units, exhaust fans, ductwork, filters, steam (or heating water) piping. A ventilation system consists of a blower to move the air, ductwork to deliver air to the room, and vents to distribute the air. A good ventilation design will distribute supply air uniformly to each area and especially areas with office machines. An effectively designed area will not have the supply and exhaust vent too close together because fresh air may be removed before it is adequately distributed throughout the area. Exhaust fans are often located a significant distance away from supply vents. A simple way to determine if the ventilation system is running a vent as a supply or an exhaust is by holding a tissue near the vent.] If the tissue moves, the air is being circulated and the direction the tissue is blown will determine the type of vent.