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air handling units

 

 

 

Air-handling units

 


EMUA
ECONOMY MAKE-UP AIR FANS - NO MOTOR

This economy make-up air unit is a non-motorized gravity vent.   It is an economical choice when a fresh air intake or pressure relief is needed.

Size CFM Against Static Resistance*
12" Wheel 1000
14" Wheel 1475
18" Wheel 2400

* Approximate CFM against static resistance is based on a throat area velocify of approximately 1200 fpm.

 

DMUA
ECONOMY MAKE-UP AIR

Can be used anywhere fresh air is needed to replace exhaust air, commercial kitchens, office buildings, bakeries, laundries, factories, warehouses, foundries, locker rooms, etc.


FEATURES & BENEFITS
Emergency disconnect switch.
Spun aluminum fan housing for rust free weather resistant durability.
Fan propellers constructed with die formed blades riveted to a steel hub.
Can be roof or wall mounted.
Standard bird screen.
Wire conduit to provide a clear channel for electrical connections.

OPTIONS
Motorized Fan Damper.
Wall Mount Ventilator Sleave.
Roof Curb.


INSA
INLINE FILTERED MAKE-UP AIR FANS - UNTEMPERED

The Air Handler Unit is the heart of the modular fan system. It is designed to deliver fresh outside make up air for installations requiring frequent air changes. Units are designed for indoor applications, and are available in side discharge only.

Packages are available in sizes up to 7,000 CFM, and external static pressures up to 2" W.G. Units have large doors on both sides to provide ample access to all internal components. Standard features include vibration isolation, high efficiency motors, and adjustable drive sheaves (belt drive units only). Airhandlers consist of a galvanized enclosure with a blower and motor. Belt drive fan units also include pulleys and belt(s). The blower module has a standard horizontal inlet with 2" filters in fan inlet.


FEATURES & BENEFITS
Vibration isolation.
High efficiency motors.
Adjustable drive sheaves. (belt drive units only)
2" washable fan filters.
G90 galvanized steel.
Easy accessibility to all components for inspection, maintenance and cleaning.
Insulated housing.
Hanging cradle.
Disconnect switch.
Lifting points.
Speed control standard on direct drive units.

OPTIONS
VAV Packages.
Extra Set of V-Belts. (belt drive units only

 

 


SA
MODULAR ROOFTOP FILTERED MAKE-UP AIR FANS

The Air Handler Unit is the heart of the modular fan system. It is designed to deliver fresh outside make up air for installations requiring frequent air changes. Units are designed for indoor or outdoor applications, and are available in vertical or horizontal discharge configurations.

Packages are available in sizes up to 22,000 CFM, and external static pressures up to 2" W.G. Units have large doors on both sides to provide ample access to all internal components. Standard features include vibration isolation, high efficiency motors, and adjustable drive sheaves (belt drive fan units only). Units consist of a galvanized enclosure with a blower and motor. Belt drive units also include pulleys and belt(s). The blower module has a standard horizontal inlet designed to accommodate an outside air inlet hood with a standard 2" filters and screen.

To satisfy a variety of installation and climatic requirements, packages are available in a number of configurations. Possible configurations include the addition of either a v-bank or an evaporative cooler intake module and a direct fired or indirect fired heating module. All modules bolt together to form a rigid common base structure that mount onto a single curb structure or can be hung for indoor applications.


FEATURES & BENEFITS

Vibration isolation.
High efficiency motors.
Compact weatherproof design.
Adjustable drive sheaves. (belt drive units only)
Horizontal or down discharge.
2" washable filters.
Inlet screen.
G90 galvanized steel.
Easy accessibility to all components for inspection, maintenance and cleaning.
Disconnect switch.
Lifting points.
Speed control standard on direct drive units.


OPTIONS
Gravity intake damper.
Motorized intake damper.
Roof Curbs.
Wall Mount Kit.
Mixing Box with Damper Control.
DX Cooling Coils.
Hot Water/Steam Coils.
Indoor Hanging Cradle.
Insulated Housing.
Evaporative Cooler Intake.
VAV Packages.
Extra Set of V-Belts. (belt drive units only)

 

 

NSA
STANDARD ROOFTOP FILTERED MAKE-UP AIR FANS

This economical blower is designed to deliver fresh outside make up air for installations requiring frequent air changes. Units are designed for outdoor applications, and are available in vertical or horizontal discharge configurations.

Fan units are available in sizes up to 6,000 CFM, and external static pressures up to 2" W.G. Units have a removable lid to provide ample access to all internal components. Standard features include vibration isolation, high efficiency motors, and adjustable drive sheaves (belt drive units only). Units consist of a galvanized enclosure with a blower and motor. Belt drive units also include pulleys and belt(s). This unit has a standard horizontal inlet designed to accommodate an outside air inlet hood with standard 2" filters.


FEATURES & BENEFITS
Unit housing made from G90 galvanized steel.
Blower mounted on vibration isolators.
High efficiency motors standard.
Variable pitch motor pulley allows for field adjustment and system balancing. (belt drive units only)
Unit available in down or straight through discharge.
2" washable filters standard.
Disconnect switch.
Spring loaded lid latches.
Speed control standard on direct drive units.


OPTIONS
Gravity intake damper.
Motorized intake damper.
Roof Curbs.
Wall Mount Kit.
VAV Packages.
Extra Set of V-Belts. (belt drive units only)








ventilator
EMUA

 

ventilators

DMUA

Air Volume: 350 - 2460 cfm
Maximum SP: 0.5" wg. @ standard air density

 

 

 




fan

INSA

Air Volume: 1 - 7000 cfm
Maximum SP: 2" wg. @ standard air density

 

 

 

 

 

 

 

 

 

 

 

 

 








airhandling unit

Model: SA

Air Volume: 2 - 22000 cfm
Maximum SP: 2.01" wg. @ standard air density

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Sale of TCF NYB fans / blowers, American Coolair ventilators, Aerovent ventilators / fans, side channel blowers, regenerative blowers, Canarm ventilators, ACME fans, Leader Delhi fans, ILG ventilators, Plastec propylene blowers, New York Ventilators, confined space fans and ventilators.
Model: NSA

Air Volume: 2 - 6000 cfm
Maximum SP: 2" wg. @ standard air density

 

 

 

 

 

 

 

 

 

 

 

 

 

 











Air-Handling Units for Make-Up Air and Space Pressurization Applications have the following features:

- Outlet Temperature is usually monitored with a probe mounted near the outlet of the unit.

- Discharge Air Temperature is set at the control panel or using a remote control station.

- Gas input is “modulated” using a butterfly valve, actuator, and controller.

Buffalo Blower Co. offers various types types of commercial and industrial Make-Up Air Systems for larger industrial plants ventilation needs. An improvement in the at industrial facilities environment can produce substantial benefits in terms of increased production, reduced errors, and a decline in complaints and absenteeism among employees.

For Space Heating Applications, a room thermostat is used to control outlet temperature. On a call for heat, the unit will provide air heated to the maximum allowed temperature until the room thermostat is satisfied. Once satisfied, the unit will either turn off or will continue to operate at a reduced outlet temperature.

An override option may also be supplied. In this case a room thermostat is supplied in addition to the basic system. The unit is set to full-fire when room temperature falls too low.

Direct Spark units are supplied with an ignition transformer for the igniter.

Piloted Units are supplied with a solenoid-operated Automatic Pilot Valve and a small pressure regulator – around 20,000 BTU – as well as an ignition transformer for the pilot spark igniter.

Pre-purge of the system (by starting the blower for a specified time to provide a minimum air volume change) before ignition of main burner is not required by ANSI code, but is frequently specified by the user. This should be provided whenever a building contains flammable dusts or vapors that could potentially reach and collect within a direct gas-fired unit while it is idle.

To assure safe operation of a direct gas-fired heating system, a number of Safety Interlocks are commonly provided:

A. Damper Limit Switch – Dampers must be fully open before unit will operate.

B. Air Proving Switch – Located near outlet of unit to prove air flow before igniting burner.

C. Flame Supervision – Discussed above. Shuts down unit on flame failure.

D. High Temperature Limit – Signals unit to reduce gas supply when maximum allowable temperature is reached. If air temperature exceeds limit, the unit is shut down.

E. High Gas Pressure Switch – Shuts down unit to protect regulator against spikes in inlet gas pressure.

F. Low Gas Pressure Switch – Shuts down unit when low inlet pressure detected. Redundant safety device, since low flame would also shut down unit.

G. Safety Shut-off Valve – Responds to various inputs listed above – closes off gas supply.

Return Air Units are widely used for direct fire space heating applications. They can be supplied with a maximum 80% return/20% fresh air, per ANSI standards. Other options include a 50/50 arrangement. “80/20” Units are configured to modulate from the 80% return/20% fresh air to up to 100% outside or fresh air. 50/50 units are generally designed to switch from 50% return / 50% fresh to 100% fresh, with no modulation between.

All return air should be brought in downstream of the burner and not recirculated through the burner. This is to prevent buildup of waste products from the combustion process within the building. It also prevents contaminants originating within the building environment from being passed through the direct fire burners. The combustion of unknown contaminants can be a serious Safety or Indoor Air Quality problem, and so must be avoided.