Roberts Gorden UHA[X][S] 30, UHA[X][S] 45 Concentric Vent Box, Vertical Option, Horizontal

SECTION 6: VENTING

Figure 12: Separated Combustion Heater - Vertical and Horizontal Vent Termination

12" (31 cm) Minimum from air inlet to vent termination (may be horizontal or vertical clearance).

NOTE: Vent supports not shown.

4" (10 cm) Diameter Air Intake

Vertical

Option

12" (31 cm)

Minimum from wall to vent termination.

4"

(10 cm) Diameter Vent

Listed Thimble

through

Combustible Wall

4" (10 cm)

Diameter Vent

4" (10 cm) Diameter

Air Intake

12" (31 cm)

Minimum from wall to vent termination.

Vent

Termination

Air Intake Termination

12" (31 cm)

Model	Air Intake & Vent Diameter	Part Number	Horizontal
UHA[X]S 30 - 125	4" (10 cm)	90502102
			Option

Minimum from air inlet to vent termination (may be horizontal or vertical clearance).

Figure 13: Concentric Vent Box

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

type

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

“B”

Seal joint between single wall

and Type B vent with silicone sealant.

Combustion Air
to Heater	Use 3 sheetmetal

Concentric

Vent Box

Toward

Outside

6" (15 cm) Single Wall Inlet Air Pipe (By Others)

Exhaust	screws equally
	spaced around joint.

from Heater

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

Use 3 sheetmetal screws equally spaced around collar.

19