KitchenAid 9763388 Venting Requirements, Venting Methods, Calculating Vent System Length

Venting Requirements

■36" (91.4 cm) model requires a 6" (15.2 cm) round vent system. 48" (121.9 cm) model requires two 6" round vent systems or a 10" (25.4 cm) round system using vent transition kit number 4396915.

■Vent system must terminate to the outside.

■Do not terminate the vent system in an attic or other enclosed area.

■Do not use 4" (10.2 cm) laundry-type wall caps.

■Use metal vent only. Rigid metal vent is recommended. Do not use plastic or metal foil vent.

For the most efficient and quiet operation:

■ Use a straight run or as few elbows as possible.

■ Use no more than three 90° elbows.

■ Make sure there is a minimum of 24" (61 cm) of straight vent

between the elbows if more than one elbow is used.

■ Do not install two elbows together.

■ Use duct tape to seal all joints in the vent system.

Venting Methods

This canopy hood is factory set for venting through the roof or wall.

The 36" (91.4 cm) model requires a 6" (15.2 cm) round vent system for installation (not included). The 48" (121.9 cm) model requires two 6" (15.2 cm) round vent systems or a 10" (25.4 cm) round vent system for installation. The hood exhaust opening is 6" (15.2 cm) round.

NOTE: Flexible vent is not recommended. Flexible vent creates back pressure and air turbulence that greatly reduces performance.

Vent system can terminate either through the roof or wall. To vent through a wall, a 90° elbow is needed.

For recirculating installations, make sure the hood exhausts back into kitchen, not into spaces within wall, ceilings, attics, crawl spaces or garages.

roof cap

■ Use caulking to seal exterior wall or roof opening around

the cap.

Cold weather installations

An additional backdraft damper should be installed to minimize backward cold air flow and a nonmetallic thermal break to minimize conduction of outside temperatures as part of the vent system. The damper should be on the cold air side of the thermal break.

The break should be as close as possible to where the vent system enters the heated portion of the house.

Make up air

Local building codes may require the use of make-up air systems when using ventilation systems greater than specified CFM of air movement. The specified CFM varies from locale to locale.

Consult your HVAC professional for specific requirements in your area.

6"

(15.2 cm)

round vent

Roof venting

6"

(15.2 cm) round vent

wall cap

Wall venting

Calculating Vent System Length

To calculate the length of the system you need, add the equivalent feet (meters) for each vent piece used in the system.

Maximum equivalent vent length is 35 feet (10.7 meters) for 6" (15.2 cm) vent, 60 feet (18.3 m) for 10" (25.4 cm) vent.

		Vent piece			6" (15.2 cm) round or
					10" (25.4 cm) round
		45° elbow				2.5 feet
						(0.8 m)
		90° elbow				5.0 feet
						(1.5 m)
90° elbow								wall cap
				6 ft. (1.8 m)
										Example vent
											system
			1 — 90° elbow				=		5 ft.		(1.5 m)
2	ft.
(0.6 m)			8 ft. (2.4 m) straight				=		8 ft.		(2.4 m)
			1 — wall cap				=		0 ft.		(0 m)
			system length				=		13 ft.		(3.9 m)

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