Whirlpool RH3730 Product dimensions, Venting requirements, Vertical roof venting

Electrical Code ANSI/NFPA 70 — latest edition*, or CSA Standards C22.1-94, Canadian Electrical Code Part 1 and C22.2 No. 0-M91 - latest edition** and all local codes and ordinances.

A U.L.- or C.S.A.-listed conduit connector must be provided at each end of the power supply cable (at the range hood and at the junction box).

In U.S. only: For power cord connected installations, a U.L.- listed range hood cord-connection kit MUST be used. Cord kit has not been evaluated for use in Canada.

Copies of the standards listed may be obtained from:

*National Fire Protection Association One Batterymarch Park

Quincy, Massachusetts 02269

**CSA International

8501 East Pleasant Valley Road Cleveland, Ohio 44131-5575

Product dimensions

	1-1/2"
12"	(3.8 cm)
		1"
(30.5 cm) 9"
		(2.5 cm)
(22.9 cm)	2"
	(5.1 cm)
6"
(15.2 cm)
3/4"
(1.9 cm)
			1-1/2"
			(3.8 cm)
	7-1/2"	3/8"
		(9.5 mm)
	(19.1 cm)
29-7/8" (75.9 cm) model: RH3730
35-7/8" (91.1 cm) model: RH3736			17-1/2"
			(44.5 cm)

Venting requirements

Venting system must terminate to the outside.

Do not terminate the vent in an attic or other enclosed space.

Do not use four-inch (10.2 cm) laundry-type wall caps.

Do not use plastic vent.

Vent system needed for installation is not included.

Determine which outside venting method needs to be used. It is recommended that the vent system be installed before installing the hood.

NOTE: If a non-vented (recirculating) installation is desired, follow instructions on Page 5.

The length of the vent system and number of elbows should be kept to a minimum to provide efficient performance. The size of the vent system should be uniform. Do Not install two elbows together. Use duct tape to seal all joints in the vent system. Vent system can terminate either through the roof or wall. Use caulking to seal exterior wall or roof opening around exhaust hood. For the most efficient and quiet operation, it is recommended that the range be vented vertically through the

roof through 7" (17.8 cm) round vent system.

Figures 1 and 2 show common venting methods and what types of materials are needed.

Vertical roof venting

7" (17.8 cm) round	roof cap
or 3-1/4" x 10"
(8.3 x 25.4 cm)
through roof

Round vent: Use 7" (17.8 cm) round damper (purchased separately)

24" (61.0 cm) to 30" (76.2 cm) above cooking surface

Figure 1

Recommended vent length

Use 3-1/4" x 10" (8.3 x 25.4 cm) with a maximum vent length of 35 feet (10.7 m) or 7" (17.8 cm) round vent with a maximum length of 50 feet (15.2 m) for vent system. For best performance, use no more than three 90° elbows. To calculate the length of system you need, add the equivalent feet (meters) for each vent piece used in the system. See the examples on the next page.

Horizontal wall venting

7" (17.8 cm) round or 3-1/4" x 10" (8.3 x 25.4 cm) through the wall

3-1/4" x 10"	wall
	cap
(8.3 x 25.4 cm)
through the wall

24" (61.0 cm) to 30" (76.2 cm) above cooking surface

Figure 2

3