Heat-N-Glo AT-GRAND, Installer'S Manual, Page: 7 / 23

4
When planning a fireplace insert installation, it’s necessary to determine:
• The vent system configuration to be used.
• Gas supply piping.
• Whether optional accessories—devices such as a wall switch, or remote
control—are desired.
Figure 1. Diagram of the AT-GRAND
TOP VIEW
MINIMUM FIREPLACE SIZE
FRONT WIDTH: 33” (839mm)
REAR WIDTH : 24” (610mm)
DEPTH : 13
1/2
” (343mm)
*
HEIGHT : 24” (610mm)
*
NOTE: If exhaust collar on insert and fireplace damper
do not line up, add 4 inches (102mm) to minimum
fireplace height for bends in vent pipe.
131/2
33
24
ON/OFF
SWITCH
LOW
VOLTAGE
WIRES
SURROUND