Commercial Kitchen Exhaust Hoods: Maintenance and Airflow Sizing

Introduction to Kitchen Ventilation

For restaurants and commercial cafeterias in Pune's IT parks, a failing exhaust hood system means the dining room quickly fills with smoke, heat, and grease. Proper sizing and rigorous maintenance of kitchen exhaust systems are critical for fire safety.

In this guide, we cover Commercial Kitchen Hood Sizing and Maintenance. Prime Cool designs and services robust ventilation systems for the hospitality sector.

Key Factors in Kitchen Exhaust

1. Calculating CFM (Airflow): Sizing an exhaust fan isn't guesswork. Standard commercial hoods require 100 to 150 CFM per linear foot of hood length for light/medium duty equipment, and up to 400 CFM/foot for heavy-duty solid fuel cooking (charbroilers, tandoors).
2. Make-Up Air Systems: If you extract 3,000 CFM of smoke from a kitchen, you must pump roughly 2,400 CFM of fresh air back in. Without a Make-Up Air Unit (MAU), the kitchen goes into negative pressure, slamming doors shut and pulling conditioned air out of the dining room, ruining AC efficiency.
3. Grease Duct Cleaning: Grease vapor solidifies inside the exhaust ducting. If a flare-up occurs on the stove, a grease-laden duct will ignite, causing a catastrophic building fire.

Expert Troubleshooting & AMC

If your kitchen is smoky despite the fan running, check for slipped fan belts on the roof blower or missing baffle filters in the hood.

Ensure your kitchen meets fire safety compliance. Book a commercial kitchen ventilation audit with Prime Cool.