Venting Requirements
Horizontal Overhang
There are two types of venting configurations ap- proved for use with the Allagash gas stove - Horizon- tal Termination and Vertical Termination.
The GF3 DVII Allagash is approved for use with the following vent components:
Simpson Dura-Vent GS
Secure Vent - Security Chimneys Intl. Ltd.
Amerivent Direct
2 ft. min.
Termination
Cap
2 ft. | Wall | |
min. |
| Vertical |
| ||
|
| |
2 ft. min.
12
Lowest
Discharge
Opening
X
Roof Pitch
is X / 12
Installation of any components not manufactured or approved by Jøtul or failure to meet all clearance requirements will void all warranties and could result in property damage, bodily injury, or serious fire. Use parts from one manufacturer only - DO NOT MIX VENT COMPONENTS FROM DIFFERENT MANUFACTURERS IN THE SAME SYSTEM.
The approved vent configurations described herein are derived from extensive testing under controlled laboratory conditions. Gas appliance performance can be negatively affected by variables present in the installation environment, i.e: strong prevailing winds, snow accumulation, etc. These conditions should be taken into consideration by the installer and stove owner.
IMPORTANT
•JOINT SEALING REQUIREMENT: APPLY A 1/8” BEAD OF
THE CEMENT SHOULD FORM A SEAL BETWEEN THE INNER AND OUTER PIPES.
•NEVER MODIFY ANY VENTING COMPONENT, OR USE ANY
DAMAGED VENTING |
|
PRODUCT. | SEALANT |
• FOLLO THE INSTALLATION | |
INSTRUCTIONS PRO- |
|
VIDED BY THE VENT |
|
MANUFACTURER FOR |
|
EACH VENT PART. |
|
• THE GAS APPLIANCE AND VENT SYSTEM MUST BE VENTED DIRECTLY TO THE OUTSIDE OF THE BUILD- ING AND NEVER ATTACHED TO A CHIMNEY SERVING A SOLID FUEL OR GAS BURNING APPLIANCE. EACH DIRECT VENT GAS APPLIANCE MUST HAVE ITS OWN SEPARATE VENT SYSTEM. COMMON VENT SYS- TEMS ARE PROHIBITED.
• IF VENTING SYSTEM IS DISASSEMBLED FOR ANY REASON, REINSTALL PER THE INSTRUCTIONS PRO- VIDED FOR THE INITIAL INSTALLATION.
2 ft. = minimum height from roof to lowest discharge opening
Figure 4. Vertical Vent Roof Penetration Height.
Vertical Venting Requirements (Vertical Termination)
·The minimum height of a vertically terminated system shall be no less than 7'. The maximum height shall be no more than 35'.
·With steep roofs, nearby trees, and predominant windy conditions, poor draft or down draft condi- tions can occur. In these cases, increasing the height of the vent may improve the situation.
·If an offset or elbow is necessary in the vertical rise, it is important to support the vent pipe every three feet, to avoid excessive stress on the offsets. Jøtul recommends the use of Simpson
·Whenever possible use 45° elbows opposed to 90° elbows. This offers less restrictions for the flow of flue gases and intake air.
NOTE: Vertical termination may result in reduced flame height and heat output due to the“suction” of natural draft.
·Vertical Termination Height: In no case shall any discharge opening on the cap be less than 2' (610 mm) horizontally from the roof surface. See Figure 4.
·A firestop is required at every floor. The opening should be framed to 10" X 10" inside dimension. Jøtul recommends the use of Simpson
·Any venting that is exposed above the first floor, regardless of attic space or living space, must be enclosed. Always maintain the required 1" clear- ance from all sides of the vertical vent system.
·It may be necessary to add restriction to a vertical venting installation, so that the draft is not too strong and creates incomplete combustion.
The Allagash is equipped with sliding restriction plates that can be adjusted to compensate for excessive draft. See Figure 5.
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