Manual

LP- 325 REV. 3.21.14

Contractors must check state and local codes before installing through an existing vent opening. State and local codes always take

precedence over manufacturer’s instructions. Failure to check state and local codes before installing through an existing opening could

result in property damage and add significantly to installation costs.

CONCENTRIC VENTING THROUGH AN EXISTING SYSTEM

NOTE: The following instructions refer only to venting through an existing vent system, and not to venting with HTP’s concentric vent

kits. Refer to Concentric Vent Kit installation manual (LP-166) for further concentric venting information and instructions.

Concentric venting through an existing system must run vertically through the roof. See Tables 5 and 7 for proper minimum vent sizing.

Use only the approved venting materials specified in Table 4 for piping the system. All instructions listed in Part 5 - Venting apply. See

Figures 18-1 and 18-2 for venting demonstrations.

The upper and lower vent terminations as well as all joints in the venting system must be properly sealed to ensure that all combustion

air is drawn properly and exhaust does not leak from the system. Failure to properly seal the venting system will result in property

damage, severe personal injury, or death.

NOTES:

A. For every 1” of overhang, the exhaust

vent must be located 1” vertical below

overhang (overhang means top of

building structure and not two adjacent

walls [corner of building]).

B. Typical installations require 12”

minimum separation between bottom of

exhaust outlet and top of air intake.

C. Maintain 12” minimum clearance

above highest anticipated snow level or

grade (whichever is greater).

D. Minimum 12” between vents when

installing multiple vents.

E. 12” minimum beyond air intake.

F. Maintain 12” minimum clearance above

highest anticipated snow level or grade

(whichever is greater).

Figures 18 – 1, 18 – 2 Concentric Venting NOTE: Drawing is meant to demonstrate system venting ONLY.

If an existing venting system is converted for use with this appliance, the installer must ensure that the existing venting system is clean

and free from particulate contamination that could damage the appliance. Failure to do so could result in property damage and

appliance failure. Such failure IS NOT covered under warranty.