19
9.0 Appendix A
Alternate floor protection
All floor protection materials must be non-combustible ie. Metal,
brick, stone, mineral fiber boards). Any combustible material may
not be used.
The easiest means of determining if a proposed alternate floor
material meets requirements listed in this manual is to follow
this procedure.
R-value = thermal resistance
K-value = thermal conductivity
C-value = thermal conductance
1. Convert the specification to r-value;
a.
If r-value is given, no conversion is needed.
b.
If k-value is given with a required thickness (t) in inches:
R=1/k X T.
c.
If c-value is given: R=1/C.
2. Determine the r-value of the proposed alternate floor
protector.
a.
Use the formula in step 1 to convert values not expressed
as “R”.
b. For multiple layers, add r-values of each layer to
determine overall r-value.
3. If the overall R-value of the sustem is greater than the
R-value of the specified floor protector, the alternate is
acceptable.
Example:
The specified floor protector should be 3/4” thick material with a
k-factor of 0.84. The proposed alternate is 4” brick with a c-factor
of 1.25 over 1/8” mineral board witha k-factor of 0.29.
Step A.
Use formula above to convert specifications to
R-value. R=1/k x t= 1/.84 x .75 = .893
Step B.
Calculate r of proposed system.
4” brick of c-1.25, therefore
R brick = 1/c = 1/1.25 = 0.80
1/8” mineral board of K = 0.29 therefore
R mineral board = 1/.29 x 0.125 = 0.431
Total R = R brick + R mineral board= 0.8 + 0.431=1.231
Step C.
Compare proposed system R = 1.231 to specified R of
0.893. Since R is greater than required, the system is
acceptable.
Definitions:
Thermal conductance =
C = btu = W
(Hr)(ft2)(f) (m2)(k)
Thermal conductivity =
K = btu = W =
(btu)
(Hr)(ft2)(f) (m2)(k) (hr)(ft)(f)
Thermal resistance =
R = btu
= (m2)(k) =
(btu)(inch)
(Hr)(ft2)(f) W
(hr)(ft2)(f)
For the Jøtul F
3
requires floor protection with a
minimum
insulating R-value of 1.1
.
Alcove installation require a minimum R-value of 1.1. (If a UL/ULC
8.0 Accessories
Firescreen (# 350168)
The Jøtul F
3
has been approved for use as an open fireplace,
with front door open. This feature is especially nice when
the ambience of a fire is desired. Some care should be taken
when operating the stove as a fireplace.
• Always have the firescreen in place, attached to the
stove front.
• Never over load the stove, for the best appearance burn
in the traditional three log configuration.
• Reminder, when burning the stove with the screen in
place, you are sacrificing efficiency for aesthetics, and
you will be consuming wood at a much faster rate.
Warning:
Operate your Jøtul F
3
CB with the front door fully
open and the firescreen in place or fully closed. A partially
opened door may result in overfiring. Also, if the door is
left partly open, gas and flame may be drawn out of the
stove opening, creating risks from both fire and smoke.
Floor bracket kit (# 750304)
The optional floor bracket kit can be used in the event
the stove needs to be secured to the floor. Complete
installation instructions and diagrams are supplied with
each floor bracket kit.
Stove-top thermometer (# 5002)
Jøtul recommends the use of a magnetic stove-top
thermometer to monitor the surface temperature of the
stove. The optimum surface temperature range for the
most efficient, clean burn is between 400° and 600°.
Short Leg Kit (# 5002)
For fireplace installations. Reduces stove height by 2 1/4”
Matte Black - 350074
Blue Black Enamel - 350075
Brown Majolica Enamel - 351147
Universal Gasket Kit (#157050)
Includes enough gasket material to refurbish the load door
and glass gasketing.
Fresh Air Adaptor (#157363)
Includes a collar to which a duct may be attached to
introduce outside air to the stove.
Floor Bracket Kit (#750304)
Used to secure the stove to the floor in a mobile home
instalation.
Stove Gloves (#157363)
Heavy-duty fire resistent with full gauntlet.
f i r e - p a r t s . c o m
