Harman Stove Company 929 DV manual Use Only Approved Venting, Roof Pitch

VENTING

Use Only Approved Venting

The Clarity Direct Vent Gas Heater has been tested and is listed for installation with Simpson Duravent GS vent- ing components. The Simpson Duravent GS warranty will be voided, and serious fire, health, or other safety hazards may result from any of the following actions:

•Installation of any damaged Duravent GS component.

•Unauthorized modification of the Duravent GS System.

•Installation of any component part not manufactured or

approved by Simpson Duravent.

•Installation other than as instructed by Simpson Duravent and the appliance manufacturer.

Consult your local building codes before beginning the installation, and follow the manufacturer's instructions ex- actly. The following Simpson Duravent GS 4" X 6 5/8" vent- ing components are approved for use with the Clarity Di- rect Vent Gas Heater.

SIMPSON DURA-VENTCOMPONENT NO.

Basic Termination Kit		970
Horizontal Termination Kit A		971
VerticalTermination Kit A		973
Horizontal Square Termination Cap		984
VerticalTermination Cap		983
Snorkel Termination Cap, 36" Vertical Rise		981
Snorkel Termination Cap, 14" Vertical Rise		982
Vinyl Siding Standoff		950
Wall Thimble		942
Round Ceiling Support/Wall Thimble Cover		940
Cathedral Ceiling Support Box		941
Storm Collar		953
Firestop Spacer		963
Adjustable RoofFlashing, 0/12-6/12 pitch		943
Steep Roof Flashing, 7/12-12/12 pitch		943S
Wall Strap		988
Designer Series Trim Kits	3951,3952,3953,
	3960,3961,3962
High WindVertical Termination Cap		991
Low Profile Termination Cap		980
DIRECT VENT PIPE LENGTHS
DURA-VENTCOMPONENTNO.
GALVANIZED		BLACK
6" length	NA	908B
9" length	NA	907B
12" length	906	906B
24" length	904	904B
36" length	903	903B
48" length	902	902B
11-14 5/8" Adjustable	-	911B
45° Elbow	945	945B
90° Elbow	990	990B

The Clarity Direct Vent should be installed with no more than 12 joints and 2 elbows. The elbows may be either 45° or 90°.

The Clarity Direct Vent must not be connected to a chim- ney flue serving any other appliance.

WARNING: The flow of ventilation air must not be obstructed.

Horizontaland Vertical Venting Requirements

The maximum horizontal run allowed for the Clarity Di- rect Vent is 10 feet. The maximum vertical rise and maxi- mum total vent length is 30 feet. The horizontal and vertical lengths of venting must fall within the shaded portion of the chart below:

Restrictor plates supplied by Harman (Part No. G218) may be added in straight vertical installa- tions only. For each 10' of vertical rise above the first 10', one restrictor plate may be added. No more than two restrictor plates may be used.

For venting systems that utilize one or two el- bows (either 45° or 90°), restrictor plates

should not be used.

For the Clarity Direct Vent, the vent/ air intake termination clearances above the high side of an angled roof are as follows:

Vertical (feet)rise

Horizontal run (feet)
Roof Pitch	Feet	Meters
Flat to 6/12	1	0.3
7/12 to 9/12	2	0.6
10/12 to 12/12	4	1.2
13/12 to 16/12	6	1.8
17/12 to 21/12	8	2.4

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