Step 2: Prepare the Venting System
This oven must be properly vented.
You may vent your ductwork in one of three ways. Do not vent into a wall cavity, an attic, or an unused area.
Room Venting
The oven is located on an inside wall of your house.
Cabinet
Oven
Wall Venting
The oven is located on an outside wall of your house: 3 1/4" x 10" duct c or minimum 6" diameter round duct f.
Cabinet
Oven
3 1/4" x 10" duct
Wall cap
Elbow
Minimum 6" diameter round duct
3 1/4" x 10" to 6" round duct transition
Roof Venting
The oven is located on an outside wall near the roof: 3 1/4" x 10" duct d or minimum 6" diameter round duct e.
Cabinet
Oven
Roof Cap
3 1/4" x 10" duct
Minimum 6" diameter round duct
3 1/4" x 10" to 6" round duct transition
If you choose the rear exhaust method (wall venting or roof venting), be sure there is enough clearance within the wall for the exhaust duct.
When Installing Venting
Keep the length of the ductwork and the number of elbows to a minimum to ventilate your oven efficiently. See examples in next section.
Keep the size of the ductwork the same.
Do not install two elbows together.
Use duct tape to seal all joints in the duct system.
Use caulking to seal the exterior wall or roof opening around the cap.
After installation, check the outside hood opening and operation.
For the outside hood opening and size refer to the upper cabinet template or rear wall template.
The ductwork you need for outside ventilation is not included with your oven. See the standard ductwork fittings.
Standard Ductwork Fittings
If the existing duct is round, you must use a rectangular-to-round adapter, with a rectangular 3" extension duct installed between the damper assembly and the adapter to prevent the exhaust damper from sticking.
- Duct Length
The total length of the duct system, including straight duct, elbows, transitions, and wall or roof caps must not exceed 140 feet.
For best performance, do not use more than three 90 degree elbows, and keep the length as short as possible.
Below are the standard fittings and their equivalent length in feet.
 | 3 1/4" x 10" to 6" transition = 5 ft |
 | 3 1/4" x 10" roof cap = 24 ft |
 | 3 1/4" x 10" 90° elbow = 25 ft |
 | 90° elbow = 10 ft |
 | 3 1/4" x 10" wall cap = 40 ft |
 | 45° elbow = 5 ft |
 | 3 1/4" x 10" flat elbow = 10 ft |
To calculate the equivalent length of each duct piece used, see the examples below.
For 3 1/4" x 10" systems | |
 | |
1/4" x 10" 90° elbow a (1ea) Wall cap b(1ea) Straight duct (8 ft) Total length | = 25 ft = 40 ft = 8 ft = 73 ft |
For 6" round systems | |
 | |
Transition (1ea) 90°elbows b (2ea) Wall cap c (1ea) Straight duct (8 ft) Total length | = 5 ft = 20 ft = 40 ft = 8 ft = 73 ft |