Kitchen Renovation — FAQ
What CFM rating do I need for a ducted range hood?
For gas cooktops, calculate 100 CFM per 10,000 BTU. Most 30-inch residential gas ranges need 300-400 CFM minimum. High-output pro-style ranges require 600-900 CFM. Electric ranges typically need 150-300 CFM depending on cooking intensity.
Is ducted always better than ductless?
Yes. Ducted range hoods remove 100% of smoke, grease, and odors from your home. Ductless models recirculate air through charcoal filters, capturing some grease but little odor or moisture. Always vent outside when structurally possible.
How high should I mount my range hood?
Mount 24-30 inches above gas cooktops, 20-24 inches above electric. Too high reduces capture efficiency; too low creates fire hazards and cooking interference. Always follow manufacturer specifications for your specific model.
What is a sone, and why does it matter?
A sone measures perceived loudness. One sone equals the sound of a quiet refrigerator (about 40 dB). Range hoods under 3 sones are considered quiet. High-CFM models often exceed 5 sones, which can be disruptive in open kitchens.
Can I use flexible ducting with a ducted range hood?
Avoid flexible ducting. The ridges create turbulence, reducing CFM by 30-50% and trapping grease. Use rigid metal ducting—smooth interior walls maintain airflow and are easier to clean. If you must use flexible, keep runs under 3 feet.
How often should I clean range hood filters?
