Class A Metal Flue
STANDARD fireplaces are tested and listed for use
with factory-built metal, Class “A” (solid fuel) chimneys as an
option. Any Class “A” or UL 103 listed metal chimney system is
accetable for use on an Isokern system. (Figure 76)
Class “A” Metal Flue Types:
The selected factory-built metal chimney for use with
the fireplaces, at a minimum, must be listed by a recognized
agency for solid fuel and as tested to UL 103, for continuous use
of one thousand degrees (1000°) Fahrenheit and intermittent use
of seventeen hundred degrees (1700°) Fahrenheit.
The factory-built metal flue design can be from the following
types:
1. Non-insulated completely thermal siphoning, double-wall,
air-cooled solid fuel rated chimneys listed to UL 103, ULC S629.
2. Double-wall with solid-pack insulation.
3. A combination of double-wall, solid-pack insulation and air
space (triple-wall).
4. Triple-wall air space solid fuel chimney.
5. Listed chimney liners conforming with the seventeen hundred
degree (1700°) Fahrenheit requirements of UL 1777 or ULCS635
or ULC640 may also be used with Isokern fireplaces.
Notes:
The selected, approved chimney manufacturer must pro-
vide the masonry anchor plate designed to fit their flue system.
(Figure 77)
All chimneys and chimney liners must be installed in
accordance with the manufacturer’s installation instructions and
under the terms of their listing for use with open faced fireplaces.
Minimum flue size for the STANDARD fireplace is
twelve and three-quarter inches (12-3/4”) inside diameter.
Maximum height of a metal flue system is not required
as all the load can be taken off the firebox.
FIGURE 76
FIGURE 77
FIGURE 78
FIGURE 79
43
TOP PLATE
SMOKE DOME
INSWOOL
BLANKET
ANCHOR
PLATE
