Martin Fireplaces 400BWBIA - Manual (Page 11)

61D0008 11
8"
Min.
6" Min. Brick
or Stone
from Top
of Platform
Brick or Stone Hearth Extension
52" (400 Models)
66" (500 Models)
16" Min.
(400 Unit)
20" Min.
(500 Unit)
8"
Min.
6" Min. Brick
or Stone
from Top
of Platform
Brick or Stone Hearth Extension
52" (400 Models)
66" (500 Models)
16" Min.
(400 Unit)
20" Min.
(500 Unit)
FLOOR PROTECTION
INSTALLING FIREPLACE ON COMBUSTIBLE FLOOR
If fireplace is installed on a combustible floor, protect the floor area either side of the fireplace opening and in the front
with an insulating non-combustible hearth extension. (16" [400 unit] or 20" [500 unit] minimum in front of fireplace and
8" minimum on both sides. See Figures 6 through 12.
Fireplace
Platform May Extend Under Hearth
Extension if Desired
Platform
(If Necessary)
Metal Safety Strip Must Be
Use if Unit Is Placed on
Combustible Floor
Metal Safety Strip
Must Be Use if
Unit Is Placed on
Combustible Floor
Figure 6 - Installing Floor
Protection (Circulating Model)
Figure 6 - Installing Floor Protection (Radiant Model)
Fireplace
Hearth Extension Clearances & Width
400 Unit 500 Unit
On Both Sides 8" Min. 8" Min.
Front of Fireplace 16" Min. 20" Min.
Extension Width 52" 66"
Note: Do not block the side air
vents or air inlet louvers on
the lower front of the fireplace
with hearth extension.
Air vents and air inlet louvers allow
necessary cooling air around the fire-
place. Determine the finished height of
the hearth extension to be used. Raise
the fireplace on a platform, if necessary,
to prevent blocking of air openings and
lower louvered panel.
Note: No platform is needed if
hearth extension does
not exceed 1" thick for
circulating units or 6½" for
radiant units.
Air Vents — DO NOT BLOCK