Offset Chart

INSTALLATION

Diagram 8

3)To install the Round Support Box/Wall Thim- ble in a ﬂ at ceiling, cut a 10 inch square hole in the ceiling centred on the hole drilled in Step 2. Frame the hole as shown in diagram 9.

Diagram 9

4)Assemble the desired lengths of black pipe and elbows necessary to reach from the appliance adapter up though the Round Support Box. Insure that all pipes and elbow connections are in the fully twist-locked position and sealed.

Diagram 10: The upper half of the ﬂ ashing is installed under the rooﬁ ng material and not nailed down until the chimney is installed. This allows for small adjustments.

Note: If an offset is necessary in the attic to avoid obstructions, it is important to support the vent pipe every 3 feet, to avoid excessive stress on the elbows, and possible separation. Wall straps are available for this purpose. See diagram 5.

Galvanizedpipeandelbowsmaybeutilized in the attic as well as above the rooﬂ ine. The galvanized ﬁ nish is desirable above the rooﬂ ine due to its higher corrosion resistance.

Continue to add pipe sections through the

ﬂashing until the height of the vent cap meets the minimum height requirements speciﬁ ed in diagram 11 or local codes. Note that for steep roof pitches, the vertical height must be increased. A poor draft, or down drafting can result from high wind conditions near big trees or adjoining roof lines, in these cases, increasing the vent height may solve the problem.

7)Ensure vent is vertical and secure the base of the ﬂ ashing to the roof with rooﬁ ng rails, slide storm collar over the pipe section and seal with a mastic.

8)Install the vertical termination cap by twist locking it.

Notes:

a)For multistorey vertical installations, a Ceiling Fire stop (Part # 963) is required at the second ﬂoor, and any subsequent ﬂ oor. Diagram 12. The opening should be framed to 10 " x 10" inside dimen- sions, in the same manner as shown in diagram 9.

b)Any occupied areas above the ﬁrst ﬂoor, including closets and storage spaces, through which the vertical vent passes, must be enclosed.

Diagram 12

NOTE: For best results and optimum per- formancewitheachapprovedventing system, it is highly recommended to apply“Mill-Pac”sealant(supplied)to every inner pipe connection. Failure to do so may result in drafting or performance issues not covered under warranty. Silicone (red RTV) is optional.

5)Cut a hole in the roof centred on the small drilled hole placed in the roof in Step 2. The hole should be of sufﬁ cient size to meet the minimum requirements for clearance to combustibles of 1-1/4". Slip the ﬂ ashing under the shingles (shingles should overlap half the ﬂ ashing) as per diagram 10.

6)Continue to assemble pipe lengths.

Diagram 11

Roof Pitch	Minimum Vent Height
	Feet	Meters
ﬂ at to 7/12	2	0.61
over 7/12 to 8/12	2	0.61
over 8/12 to 9/12	2	0.61
over 9/12 to 10/12	2.5	0.76
over 10/12 to 11/12	3.25	0.99
over 11/12 to 12/12	4	1.22
over 12/12 to 14/12	5	1.52
over 14/12 to 16/12	6	1.83
over 16/12 to 18/12	7	2.13
over 18/12 to 20/12	7.5	2.29
over 20/12 to 21/12	8	2.44

Hampton® H25-1 Direct Vent Freestanding Gas Stove

H25-LP1 Propane, H25-NG1, H25-LP1 specifications

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