The Great Hall
Help, my kitchen exhaust is not working properly...... The Great Hall: Help, my kitchen exhaust is not working properly......
By jeff_macrae on Tuesday, June 27, 2000 - 01:45 pm: Edit

Does anyone know anything about how air flow should work? It is "stupid hot" and all the repair men say is "well the fan is running".
What is going on?

By Dpconsu (Dpconsu) on Tuesday, June 27, 2000 - 02:42 pm: Edit

No evacuation fan will suck the hot air out of a kitchen unless you have a "make-up" air input. Air curtains in the hood tend to chill food on the plate before it gets out of the window. So make sure that your fan output is 30 times the cubic volume of your kitchen areas and ensure that you have a source of outside air under or behind the hot line.
It is basic physics, hot air rises, Right? therefore give the fan a source of cooler air to assist the super heated air from your ovens and ranges to flow directly up the vent instead of sucking the airconditioned air from the kitchen and probably through the doors from the dining room too.

Also a major facture to take into account is how many calories/BTU's do your coolers, line fridges and dishwasher give off into the kitchen. You may have to go to a larger vent and fan if the original set up was nickled and dimed.

By Rodriego on Thursday, June 29, 2000 - 01:26 am: Edit

I have the same problem in my kitchen. I was working in the prep area today ( the coolest part of the kitchen ) and my pocket thermometer was reading 95 F. Up on the front line it would have to have been well over 100 F. I've talked to my boss about this. His attitude is " kitchens are supposed to be hot." I'd like to see him work a 12 hour shift in there and see how he likes it.

By Panini (Panini) on Thursday, June 29, 2000 - 05:16 pm: Edit

Dpconsu gives you correct information. Do your vent-a-hoods have the make-up air right in the box or are they vented. You will have better luck with powered make-up{the fresh air that comes into the vent a hood}. There is a fan on the exhaust and a fan on the intake.
If you have reach-ins, refrigeration, ice makers in the same kitchen, they all give off an enormous amount of hot air.
Your airconditioning may not be able to penetrate these hot pockets of air. Check your AC.
Put a thermometer by the return air vent, then place it by the AC ducts. The temperature should be at least 12 deg. cooler.
Do that and post again, maybe we can direct some of those vents or get a good case for your boss to get the problems fixed. If the ambient temperature around your compressors is high he will be replacing them 2 times faster than normal.

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