Roberts Gorden UHD[X][S][R] 125, UHD[X][S][R] 75 service manual Concentric Vent Box

SECTION 6: VENTING

Figure 9: Separated Combustion Heater - Vertical and Horizontal Vent Termination

Model	Air Intake &	Part Number
	Vent Diameter
UHD[X]S[R] 75 - 125	4" (10 cm)	90502102

Figure 10: Concentric Vent Box

			of	4"	(10	cm)
	piece				Model
One
		.Selkirk
	ent
“B”	v

Seal joint between single wall

and Type B vent with silicone sealant.

type

				(6	cm)	airspace
		1/4"				others)
				.(By
diameter, iv
	qu		alent
Vor	e
R

Toward Outside

Combustion Air to Heater

Exhaust from Heater

4" (10 cm) Single Wall Vent Pipe (By Others)

Use 3 sheetmetal screws equally spaced around joint.

6" (15 cm) Single Wall Inlet Air Pipe

Concentric (By Others) Vent Box

Use 3 sheetmetal screws equally spaced around collar.

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