Buffalo Fan Industrial centrifugal fans, AHU OEM blowers, ventilators, high pressure blowers, high temperature oven exhaust and high temperature circulating fans; and wall / roof exhaust ventilator fans.< Sales of industrial air handling units, direct gas fired air handlers, indirect gas fired AHU airhandlers, as well as commercial and industrial blowers, fans, centrifugal and axial ventilators, heat exchangers, heating, cooling finned coil, aluminum, copper, steel, stainless, Heresite coated coils, commercial, institutional, condencing, AHU units, gas fired air handlers, air-handling blowers, ARI fans, damper actuators, fined coils.
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BUFFALO FAN

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Air Handling Units


Buffalo Fan Co. offers two major gas fired Air-Handling Unites (AHU) types: direct gas-fired and indirect gas-fired airhandlers.

DIRECT GAS-FIRED AHU

Direct gas-fired AHUs have a gas burner installed directly in the outside makeup air stream. The products of combustion (carbon dioxide [CO2], carbon monoxide [CO], nitrogen dioxide [NO2]) are discharged directly into the makeup air stream and supplied to the building ventilation area.

INDIRECT GAS-FIRED AIR HANDLING UNIT

An indirect gas-fired AHU has a sealed combustion air chamber where all products of combustion are discharged through a flue to the outside environment and no products of combustion are discharged within the make-up air supplied to the building. Such equipment also frequently is utilized for recirculating air applications.

DIRECT-GAS-FIRED AIRHANDLER COMPONENTS

Though simple in principle of operation, direct gas-fired AHUs have sophisticated burner-control blower systems. Unit sizes range from 1,000 cfm with a heating capacity of 80,000 Btuh to 100,000 cfm with a heating capacity of 15 million Btuh. Direct-gas-fired-AHU components usually include housings, supply fans, heating & cooling coils, outside air intake hoods, intake dampers, filters and burners.

AIR HANDLING UNIT HOUSINGS

AHU air-handler housings are made of galvanized or aluminized steel. Access panels are provided to access air dampers, filters, burners, and fans / motors. AHUs located outside are provided with a sloped roof and standing seam joints.

AHU SUPPLY FANS

Fans typically are double-width double-inlet (DWDI) with forward-curved or backward-inclined blower blades. Fans can come with open drip-proof (ODP) or totally enclosed fan cooled (TEFC) motors. The most typical external static pressure in the 2- to 3-in.-wg range. Because most outside istalled air handling units can operate  below 0°F, fan motors and bearings are rated to handle lower temperatures. For applications that require supply-air temperatures higher than 110°F, the motors and fan bearings are rated for maximum design operating temperatures when placed in draw-through configurations.

AIR INTAKE DAMPERS AND HOODS

Outside air intake hoods or weather hoods are designed for an installation specific location and usually provided with bird screens. Outside-air intake isolation dampers are furnished to prevent cold air from dropping through a unit into a warm building and warm air from escaping through a unit during winter months, when it is not in operation. Low-leakage parallel blade isolation dampers are most standard. The fan discharge is located at the opposite to isolation-damper position.

AHU FILTERS

A filter cabinet normally has 30 / 30 filters in a V-bank configuration to increase filter area and reduce static-pressure drop across the fan filters. Higher-efficiency filters are used on application.

BURNERS

A burner consists of a cast-iron or aluminum pipe assembly with drilled gas orifices. The fuel-air mixing is controlled by perforated stainless-steel baffles attached to the pipe assembly. The burner can be placed in the outside airstream or in the outside / return mixed-air stream. But to prevent potentially hazardous combustion byproducts of indoor-air contaminants, the burner is placed in the outside airstream only. The required airflow across the burner must be within a specific velocity range (typically 2,500 to 3,500 fpm) for proper combustion. For variable airflow units, a modulating bypass damper or profile plate maintains the airflow velocity within the specified velocity range. Otherwise, the burner can experience inefficient operation, generate odors in the occupied spaces served, and create an un-safe increase in certain products of combustion.





Industrial gas-fired airhandler Heatcraft ahu air-handling units                     Industrial gas fired Heatcraft air handling unit airhandler





Buffalo Fan Co. Air Handling Units are well-known for:

LONG SERVICE LIFE:
We use premium quality industrial-grade materials and additional protective coatings for external surfaces and internal components of our Air Handling Units - to withstand the specific gases flow and the installation conditions of each application, industrial and commercial / institutional.

CAPACITIES: Up to 100,000 CFM for standard construction and larger, custom made on special request.

FLEXIBILITY: Every air-handling unit is designed for the specific installation and connections conditions. The unit floor area and its cross section dimensions are adjusted for precise room available at site.

EASY INSTALLATION: Packaged compact or sectional design provided with lifting arrangement and protections for easy transportation and handling / installation at site.

LOW MAINTENANCE: Service friendly design which provide large room inside cabinet, access doors, light and rigid floor ensuring accessibility to all components.

HIGH EFFICIENCY: Fans, coils, motors, humidifiers, filters, external insulation material, silencers, enclosure tightness, and other components are carefully selected and engineered for lowest energy consumption.

OPERATIONALLY SAFE: Safety devices and guards are provided in accordance to the international regulations and the customer specific requirements.

PRECISE PERFORMANCE: To match the customer capacities requirement utilizing the computerized selection for each component.

To submit your Request for Quotation, click here:


Industrial gas fired air handling units, direct fired and indirect gas fired air handlers.
Buffalo Fan blowers : buffaloblower


New York, Twin City Fan, Northern Blower, Chicago Blower, Sheldons, Cincinnati Fan, Hartzell, IAP, Industrial air products, Canadian blower, Aerovent, Penn Ventilation, Penn-Barry, Barry Blower, ACME, Aerovent, Alphair, American Fan, Lau Industries, Clarage, Delhi, Canarm, Leader Fan, Daltec, ABB, Flakt, Flaktwoods, Woods, MK Plastics, Robinson Industrial, Garden City Fan, Loren Cook, Jen-air, Jenn Fan, Aeroflo, Grainger, Greenheck, Kice Fan, ILG Industries, Canada Fan, Industrial Air, Ceilcote, Breidert, Anderson 2000, Solar and Palau, Strobic Air, Trane, TCF Axial fans and ventilators. Canada Blower Co. developed new temperature fans and blowers for industrial applications to 2200 F. This was achived by using extremely high strength stainless steel alloys for the fans impellers, that allow for higher safe speeds at elevated temperatures.

The Canada Blower high temperature oven fans line now include:

- Operating up to 2200 F, centrifugal, axial and plug fan types;
- Pre-engineered and custom made fans for all types of applications with vaiety of impeller types and accessories;
- Canada Blower engineers provide a professional advice and recommend a right fan for every application & oven / plenum design;
- The fan offering provides competitive replacement fans to Garden City, Lau, IGE, Alloy Fabricating fan models; repairs, re-build & balancing;
- Unique high temperature water-cooled motors for operation up to 2300 F.

Fans with ambient air cooling systems handling hot airstreams must have sufficient airflow and be kept in operation until airstream temperatures cool below 120 F to prevent damage to the fan unit. The Tubeaxial fan ambient air cooling system is only effective while fan is operating.

There are two major types of high temperature fans - centrifugal and axial ventilators:

Centrifugal fan Wheels:

    * Multiblade forward curved fan wheel. This type of wheel is usually specified where there is a necessity for large volumes of flow against low to medium static pressure requirements.  The forward curve fan blade is that it delivers the same volume of air as either the backward or radial blade wheel, at a lower fan speed, which is important due to wheel stresses at elevated temperatures.  This fan is the most common type used in all types of heat treatment operations except where a buildup of material on the blades could occur, as wheel unbalance would result.
    * Radial Blade, paddle wheel type fans. This type of wheel is usually specified where there is a necessity for medium volumes of flow against medium to large static pressures. The paddle blower wheel is considered a self cleaning type of wheel. It could be used where there are various materials or dust in the air stream. Due to its structurally strong design, it is used in many heat treatment applications at very high temperatures where maximum fan longevity is desired.

Axial Blade Fan Wheels:

    * The axial blade wheel is usually specified where there is a need for very large volumes of flows against low static pressure. Axial wheel like the multi-blade forward curve type wheel could cause an axial fan to deliver different air volumes at the same static pressure, if the total pressure requirement of the fan system was underestimated. This type of fan is ideally suited where a large volume of flow is required with a minimum of duct work and is used extensively for small and large furnaces, such as aluminum annealing.

Fans handling hot airstreams must have sufficient airflow and be kept in operation until airstream temperatures cool below 120 F to prevent damage to the fan unit. The Tubeaxial fan ambient air cooling system is only effective while fan is operating.
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