Is 800 CFM enough for a range hood?

Yes, an 800 CFM (cubic feet per minute) kitchen range hood is more than enough ventilation power for the vast majority of residential cooking setups, including large 36-inch or 48-inch high-output professional gas cooktops. An 800 CFM blower provides immense suction capacity capable of rapidly capturing heavy grease vapors, smoke, and steam generated by multiple burners operating simultaneously. However, because exhaust blowers exceeding 400 CFM often trigger local building code requirements for a dedicated makeup air replacement system to prevent negative pressure, you must check local regulations. You can troubleshoot ventilation sizing easily by reviewing cooktop output specifications. You can verify that your setup is effective when running the 800 CFM fan clears heavy cooking smoke instantly without backdrafting household appliances.