Restaurant HVAC
Systems

Restaurant HVAC: Why Kitchen Systems Are Different

Restaurant HVAC isn't regular commercial HVAC — not even close. Your kitchen exhaust hoods are pushing 2,000-5,000 CFM of air straight out of the building. Every cubic foot of air that leaves has to be replaced, and that's where most restaurant owners run into problems. Without a proper make-up air unit (MAU), your building goes into negative pressure. Doors won't close right. Pilot lights blow out on gas appliances. Grease traps don't drain properly. I've walked into restaurants where the front door practically sucks you inside — that's a ventilation problem, not a feature.

A make-up air unit costs $8,000-$20,000 installed, and I know that sounds steep. But here's what happens without one: your main AC system works 40% harder trying to condition all that unconditioned outside air being pulled in through every crack, gap, and opening in the building. That's an extra $200-$400 per month in energy costs, plus the compressor wears out years earlier. The MAU pays for itself.

North Texas restaurant HVAC sizing follows different rules than standard commercial. Kitchen areas need roughly 1 ton of cooling per 100 square feet — compare that to 1 ton per 400 square feet for a dining room. So a 3,000 square foot restaurant with a 1,000 square foot kitchen might need 15-20 tons total cooling capacity. Undersizing is the most expensive mistake you can make because it can't be fixed without replacing equipment.

Here's something that catches people off guard: health department ventilation requirements aren't optional. Proper kitchen ventilation is required for your operating permits in every North Texas municipality. I've seen restaurants get shut down during inspections for ventilation non-compliance. If you're opening a new restaurant or taking over an existing space, get your HVAC inspected before you sign the lease.

Walk-in coolers and freezers are the other critical piece. If your compressor fails during a North Texas summer, you have 2-4 hours before food loss starts. That's $5,000-$20,000 in spoiled inventory. Emergency response for restaurants is our number one priority for exactly this reason — the financial impact is immediate and severe.

Restaurant owners: your HVAC bill will be your second or third highest operating cost after labor and food. Budget $3-$6 per square foot annually for HVAC, and get a preventive maintenance contract that includes quarterly kitchen exhaust inspections. It's the cheapest insurance in the restaurant business.