Thermador PHH30DS, PHH36DS Ductwork Installation Guidelines, After having choosen the vent option

TABLE 2. DUCTWORK INSTALLATION GUIDELINES

For safety reasons, ducting should vent directly outdoors (not into an attic, underneath the house, into the garage or into any enclosed space).

Keep duct runs as short and straight as possible.

Duct fittings (elbows and transitions) reduce air flow efficiency.

Back to back elbows and „S“ turns give very poor delivery and are not recommended. A short straight length of duct at the inlet of the remote blower gives the best delivery.

Transition to duct from the integral blower or remote duct transition as close to the downdraft as is pos-sible. In order of preference, use

1st. 10" round duct 2nd. 8" round duct 3rd. 3-1/4" x 14" duct 4th. 7" round duct 5th. 3-1/4" x l0" duct 6th. 6" round duct

The use of flexible metal round duct should only be used when no other duct fitting exists. Limit use to short lengths and do not crush when making corners.

•After having choosen the vent option:

1.Prepare duct and conduit cut outs, see Fig.1,2,3 as needed.

Cabinet Front

Bottom of
Cabinet or
Soffit
					Vertical
					Discharge
			10"	2-3/4"
12"	4-15/16"				1-1/2" Dia. Holes
				1-7/8"
					Vertical conduit
	2-1/2"				option
			6-1/4"
Rear			CL
Wall
Figure 1		Hood Width

Cabinet Front

Bottom of

Cabinet or

Soffit

			2-3/4"
12"			1-7/8"	1-1/2" Dia. Holes
				Vertical conduit
				option
	7/16"
Rear	8 13/16"	Ø 8 1/4"		Horizontal
Wall				Discharge

Figure 2

7/16"

Hood Width

CL

12"

11"

3-9/16"
Figure 3		23-1/16"

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