HearthStone
Quality Home Heating Products Inc
®
Clydesdale Model 8490
7
Floor protector’s come with various types of
specifications. To convert a floor protector’s specification
to an R-value, do one of the following:
•
If the R-value is given, use that value—no
conversion is needed.
•
If a K-factor is given with a required thickness
(T) in inches, use this formula: R-value = 1/K x
T
•
If a C-factor is given, use the formula: R-value =
1/C
To determine the R-value of the proposed alternate floor
protector:
•
Use either the K-factor or the C-factor formula
explained above to convert specifications not
expressed as R-values.
•
For multiple layers of floor protectors, simply
add the R-values of each layer to determine the
overall R-value of the layers.
If the overall R-value of your setup is greater than the
R-value of the specified floor protector, then your setup is
acceptable.
Noncombustible Material
Thickness
R-value
Gypsum or plaster board
1
1
/
2
″
0.45
Wallboard, Wonderboard, or
Durock
1
1
/
2
″
0.20
Ceramic board (Fiberfrax or Micor)
1
1
/
2
″
1.10
Nominal solid clay brick
1
1
″
0.20
Ceramic wall or floor tile
1
1
/
4
″
0.01
Mineral wool insulation
2
1
″
3.12
Cement mortar
2
1
″
0.20
Horizontal still air
2
*
1
/
8
″
0.92
1
According to Intertek Testing Services, Inc.
2
According to ASHRAE Handbook of Fundamentals
1977
HearthStone’s Thermo-Ceramic Baffle System
To enhance the combustion efficiency and reduce the emissions of the fire in your stove HearthStone
QHHP, Inc. has developed an advanced THERMO-CERAMIC baffle system. This system uses a
lightweight, durable ceramic material above the burner tubes to maintain the high temperatures in the
secondary combustion area and maintain the low emission – high efficiency combustion you desire. This
new technology will not corrode, rust dissolve or lose its strength, however it is vulnerable to puncture or
cracking due to rough handling.
PLEASE EXERCISE CARE WHEN LOADING WOOD OR CLEANING YOUR
STOVE, NOT TO DAMAGE THE Thermo-Ceramic BAFFLE
Located directly above the burner tubes in the firebox, this white sheet of material will break if wood or
cleaning brushes impact it. Be careful when loading and cleaning your stove to not break this material. If
this piece has been fractured or a hole is punctured, it will cause the stove to function improperly. You must
replace the board through a qualified HearthStone dealer.
