Cooking activities generate moisture, grease in the air, fumes, and odors that eventually cling to cabinets, walls, curtains, flooring, and other surfaces. The only efficient way to combat this residue and the stale cooking odors that linger is with an exhaust system. A poorly ventilated kitchen will suffer from chronic condensation and the odors of your last meal.
Ventilation systems include fans, air ducts and hoods. Building codes, in most communities, require that ventilation hoods be installed over all heat and smoke producing equipment. Ventilation requirements for the kitchen area are generally 20 to 30 air changes per hour.
When shopping for an exhaust fan, look for a variable speed option that lets you use the lowest effective setting so your energy consumption can be reduced. Ensure that kitchen ventilation systems or range exhaust systems function properly and are in use while you are cooking.