Variable Volume Option -...

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Greenheck Kitchen Ventilation Systems

Variable Volume Option


Variable Volume Kitchen Ventilation Systems

A system designed to vary the exhaust and supply volume using variable frequency drives.


Optic SensorKey Pad VFDs

I/O Processor

Exhaust Collar

Temp Sensor

System Components


Energy Savings Example

Constant CFM - Fan on all Day 3300 CFM100% Fan

50% Fan

30% Fan

0% Fan6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11

Represents Variable Exhaust Fan System

Operating HoursBreakfast Lunch Dinner


Energy Savings Payback

• Typical paybacks average 1 to 3 years.• Air flow reduction is typically between 10% and

50%• Applications requiring heated and cooled have the

shortest payback period.


Features

• Air purged optic sensor• 100% Over ride switch• Mount and pre-programmed components• System monitoring and programming at the

keypad• Built-in timer for automatic on/off capability• Automatic optic sensor calibration


Benefits

• Saves energy• Prolongs equipment life• Enhances employee comfort• Reduced hood noise• Low fan maintenance• May qualify for energy rebate• “Soft-Starting” fans


Options

• Comfort mode sensor• Winter set-back • Humidity sensor• IAQ sensor• Fire safety control


Mechanical Code Compliance

2006 International Mechanical Code507.1 GeneralCommercial kitchen exhaust hoods shall comply with the requirements of this section. Hoods shall be Type I or Type II and shall be designed to capture and confine cooking vapor and residues.

Exceptions:Net exhaust volumes for hoods shall be permitted to be reduced during no-load cooking conditions, where engineered or listed multi-speed or variable-speed controls automatically operate the exhaust system to maintain capture and removal of cooking effluents as required by this section.


NFPA-96 Compliance

• NFPA-96 2008 Edition• 8.2.1 Air Velocity• 8.2.1.1 • The air velocity through any duct shall not be • less than 152.4m/min. (500 ft/min)


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Variable Volume Option -...

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