How to Upgrade Your Kitchen Ventilation

Kitchen ventilation is the unsung hero of a functional home. A proper hood does more than just clear the air; it keeps your cabinets free of grease and stops moisture from warping your ceiling and drywall over time. Most builder-grade setups simply recirculate air through a charcoal filter, which does very little to manage humidity or heavy smoke. Moving to an exterior-ducted system requires planning for duct runs and roof or wall caps, but the result is a professional-grade environment. When this job is done right, your kitchen stays cool, your air quality remains high, and your cabinets stay clean for years to come. Focus on getting a tight seal on your ductwork and ensuring the CFM rating matches your stove's output.

  1. Map Your Duct Route. Measure your current hood's width and the distance from the cooktop to the cabinet base. Check your attic or exterior wall to map out the shortest, straightest path for your ductwork to minimize elbows and friction.
  2. Kill Power First. Shut off power to the kitchen at the breaker panel. Unscrew the mounting hardware from beneath the hood and carefully disconnect the electrical wiring and old vent collar before lifting the unit away from the wall.
  3. Avoid Hidden Studs. Trace the outline of your new duct kit onto the wall or cabinet base. Use a jigsaw to cut the opening, ensuring you account for the diameter of the rigid metal ducting, usually 6 or 8 inches.
  4. Pitch Downward Always. Cut a hole through the exterior wall or roof following the vent cap manufacturer's template. Apply silicone caulk around the flange before securing the vent cap to ensure a watertight seal against the siding or shingles.
  5. Tape Seams, Skip Screws. Run rigid galvanized steel or semi-rigid aluminum ducting from the exterior cap back to the hood location. Secure every seam with foil HVAC tape, never using screws that could snag grease inside the pipe.
  6. Test Before Closure. Lift the new hood into place and secure it using the provided mounting bracket or toggle bolts. Connect the electrical supply line within the junction box, matching black to black, white to white, and ground to ground.