Exhaust Fans

CFM (Cubic Feet per Minute) requirements depend on kitchen size and cooking habits. As a general rule, multiply your kitchen’s square footage by 2 for moderate cooking, or by 4 for heavy cooking. For example, a 200 sq ft kitchen needs 400-800 CFM. Professional kitchens may require even higher ratings.

Exhaust fan noise is measured in sones. For residential use, look for fans rated at 1.5 sones or less for quiet operation. Kitchen exhaust fans typically range from 1-4 sones. Bathroom fans should ideally be under 1.5 sones. Higher CFM fans tend to be louder, so balance airflow needs with noise tolerance.

Simple replacement of existing exhaust fans can be DIY-friendly if you’re comfortable with basic electrical work. However, new installations requiring ductwork, electrical wiring, or structural modifications should be done by licensed professionals to ensure proper ventilation, electrical safety, and building code compliance.

Kitchen exhaust fans should be cleaned every 3-6 months due to grease accumulation. Bathroom fans need cleaning every 6-12 months. Regular cleaning prevents fire hazards in kitchens, maintains efficiency, and extends fan lifespan. Always disconnect power before cleaning and follow manufacturer guidelines.

Ducted fans vent air outside through ductwork, providing superior ventilation by removing moisture, odors, and pollutants completely. Ductless (recirculating) fans filter air and return it indoors, suitable where ducting isn’t feasible. Ducted systems are more effective but require installation planning for duct routing to exterior walls or roof.