Venting Requirements

FOR CORRECT VENTING

  • Allow 28-36″ between the top of the cooking surface and the
    bottom of hood.
  • The best option is to vent vertically through the roof if possible;
    vent through a side wall if you cannot vent directly above your hood.
  • Use galvanized steel or metal ducting only.
  • For best performance use as few elbows as possible, with no more
    than three 90° elbows. Include at least 18″ straight from the transition
    piece before using an elbow in the duct and make sure there is at least
    24″ of straight vent between any elbows.
  • Use or duct tape or HVAC tape to seal all joints in the vent system.
  • Use caulking to seal exterior openings around the cap
  • Always use metal HVAC ducting for maximum airflow.
  • Always keep the duct clean to ensure proper airflow.

NEVER

  • Terminate the vent system into an attic or other enclosed area.
  • Mount the range hood outside of the 28″-36″ height above the
    cooking surface. Hoods mounted too low may be susceptible to heat
    or fire damage. Hoods mounted too high will perform poorly and
    become inefficient.
  • Use 4″ (10.2 cm) laundry-type wall caps.
  • Use plastic venting or plastic ducting.
  • Use more than 40′ of ductwork.
  • Install a range hood lower than 36″ over a BBQ.

VERTICAL ROOF VENTING

  • Ducting goes vertically above the range hood through the house’s
    roof. This is the most efficient way to vent and the preferred venting
    option for all Wall mounted or Island hoods.
  • A roof cap is needed to protect the ducting from the exterior. Seal the
    roof cap with caulking.

HORIZONTAL WALL VENTING

  • This is an alternative option to vertical venting. Ducting goes horizontally from the range hood through the house’s side wall. Depending on the model of hood, venting can go straight through an exterior wall from the back of the hood using a blower rotating kit* (Option 1). If a rotating kit is not available we may be able to rotate the hood’s blowers for an additional charge.
  • The second option is to vent off the top of the blowers and elbow out the back of the hood, through the wall. (Option 2) For correct venting please allow at least 18″ of straight vertical travel off the top of the transition piece before attaching the elbow. (As seen)
  • A side wall cap is needed to protect the ducting from the exterior. Seal the side wall cap with caulking.

HORIZONTAL WALL VENTING

  • This is a second, alternative option to vertical venting. Ducting goes through the kitchen ceiling from the top of the hood and then through a nearby exterior wall.
  • For wall hoods it is recommended venting out the wall that the hood is mounted on to, allowing the shortest exit. For island hoods the nearest exterior wall in any direction is recommended for venting.
  • A side wall cap is needed to protect the ducting from the exterior. Seal the side wall cap with caulking.

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