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Regency CI1203 / CI1253 Wood Cast Insert
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installation
Clearance diagram for installations
Side and Top facing is a maximum of 1.5" thick.
Floor protection must be non-combustible, insulative material with an R value of 1.1 or greater.
*
If the hearth extension is flush with the floor (F) it must extend 19.5" in front of the body face (E).
Note: Hearth Extension Width (G) is measured from edge of fuel door to side of hearth.
** A non-combustible mantel may be installed at a lower height if the framing is made of metal studs covered with a non-combustible board.
*** Mantel Depth, Maximum of 10" (254mm).
MASONRY AND FACTORY BUILT FIREPLACE CLEARANCES
The minimum required clearances to combustible materials when installed into a masonry or factory built fireplace are listed below.
A
B
C
D
G
F
E
H
HOW TO DETERMINE IF ALTERNATE
FLOOR PROTECTION MATERIALS ARE ACCEPTABLE
The specified floor protector should be 3/8" (18mm)
thick material with a K - factor of 0.84.
The proposed alternative is 4" (100mm) brick with
a C-factor of 1.25 over 1/8" (3mm) mineral board
with a K-factor of 0.29.
Step (a):
Use formula above to convert specification to
R-value.
R = 1/k x T = 1/0.84 x .75 = 0.893.
Step (b):
Calculate R of proposed system.
4" brick of C = 1.25, therefore
Rbrick = 1/C = 1/1.25 = 0.80
1/8" mineral board of k = 0.29, therefore
Rmin.bd. = 1/0.29 x 0.125 = 0.431
Total R = Rmineral board =
0.8 + 0.431 = 1.231.
Step (c):
Compare proposed system R of 1.231 to speci
-
fied R of 0.893. Since proposed system R is
greater than required, the system is acceptable.
DEFINITIONS
Thermal Conductance:
C
= Btu
= W
(hr)(ft
2
)(
o
F) (m
2)
)(K)
Thermal Conductivity:
k = (Btu)(inch) = W = Btu
(hr)(ft
3
)(
o
F) (m)(K) (hr)(ft)(
o
F)
Thermal Resistance:
R = (ft
2
)(hr)(
o
F) = (m
2
)(K)
Btu
W
Floor Protection
Please check to ensure that your floor protection
and hearth will meet the standards for clearance to
combustibles. Your hearth extension must be made
from a non-combustible material.
Thermal floor protection is not required if the unit is
raised 3.5" minimum (measured from the bottom of
the stove). However, standard ember floor protec
-
tion is required. It will need to be non-combustible
material that covers 16" (406mm) in the US and
18" (450mm) in Canada to the front of the unit
and 8" (200mm)in Canada, 6" (152mm)in the US
to the sides.
If the unit is not raised, thermal floor protection
required is R value of 1.1 or greater.
Adjacent
Side Wall
(to Side)
**A
Mantel**
(to Top)
B
Top
Facing
(to Top)
**C
Side
Facing
(to Side)
**D
Minimum
Hearth
Extension
E
Minimum
Hearth
Thickness*
F
Minimum
Hearth Side
Extension
G
From Top of Door
H
CI 1203
CI 1253
15" (381mm)
20" (508mm)
14" (356mm)
7-3/8" (187mm)
US 16" (406mm)
1-1/2" (38mm)
US 6" (152mm)
17" (432mm)
CAN 18" (457mm)
CAN 8" (203mm)
20-1/2" (521mm)
** Measured from side/top of door.
