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START - CHECK - BALANCE
EXHAUST FAN(S)
1. Open all doors and/or windows leading to outside.
2. Start the exhaust fan only. Do not run the supply fan or Make-up unit.
3. Refer to Randell Air Systems drawings and/or U.L. information label on hood for
proper CFM requirements.
4. Adjust speed of exhaust fan to obtain proper air velocities and CFM through
grease filters.
SUPPLY FAN OR MAKE-UP AIR UNIT
1. Start the supply fan and/or Make-up unit only. Do not run the exhaust fan.
2. Refer to Randell Air Systems drawings or U.L. information label on hood for
proper CFM requirements.
1. Close all doors and windows.
2. Operate all exhaust fans even those serving other hoods, supply fans, make-up air
unit and building HVAC system.
3. Turn on all cooking equipment under the hood and preheat to operating temperature.
4. Produce large quantities of smoke or steam.
5. Observe capture of vapors.
6. If all vapors are not totally captured, fine tune the system by adjusting the air
volume control damper installed in the supply collar. Slightly reduce the amount of
supply air directed under the hood until full capture is obtained.
7. Check total pressure in building. Pressure should not exceed .02 negative pressure.
MAKE-UP AIR HOODS
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FINAL AIR BALANCE
MAKE-UP AIR HOODS