American Energy Systems Harvester - Manual (Page 27)

27
PELLET (ALL FUEL) VENT SYSTEMS
Harvester installations requiring a connection from the product through a combustible wall require
either a UL Listed thimble (wall penetration assembly) or other methods as outlined in the National Fire
Protection Association (NFPA) Standard 211. Pellet (all fuel) vent system installations fall into 3 basic
categories:
1)
Direct Vent Installation
2) Flexible Liner Vent Installation
3) Vertical (inside or outside) Vent Installation
All pellet vent system installations must conform to the following basic requirements:
a. Insulation material used in wall pass-through systems shall be noncombustible material and
shall have a thermal conductivity of 1.0 Btu-in./hr-ft 2 - 0 F (4.88 kg-cal/hr-m 2 - 0 C) or less.
b. All clearances and thicknesses are minimums; larger clearances shall be permitted.
c. Any material used to close up an opening for the connector shall be of noncombustible
material.
The installer should have significant experience and knowledge in pellet vent system variations. To
maintain your Country Flame Warranty, it is imperative that a certified installer complete an installation
that bests suits a site-specific application. FIGURES 12 through FIGURE 14 provide examples of
combustible wall installations for residential heating appliances. These are ONLY EXAMPLES.
During any installation, it is imperative to consult local code authority or an installation professional to
ensure site-specific conditions are accounted for in the installation.
FIGURE 12: DIRECT VENT SYSTEM INSTALLATION