2700-I WOOD INSERT (ACT)
Page 6
September 1, 2008
R
7007-161H
CALCULATING ALTERNATE
FLOOR pROTECTION
Material
Thermal Conductivity: k value
The k value indicates the amount of heat (in BTU’s) that will flow
in 1 hour through 1 square foot of a uniform material 1 inch thick
for each degree (F) of temperature difference from one side of
the material to the other. The LOWER the k factor means less
heat is being conducted through the non-combustible material to
the combustible material beneath it. The k value of a material
must be equal or smaller then the required k value to be accept-
able.
(BTU) (inch)
(foot
2
(hour) (
o
F)
Thermal Resistance: R value
The R value is a measure of a material’s resistance to heat
transfer. R value is convenient when more than one material
is used since you can add the R values together, whereas
you can not do this for k value. The HIGHER the R factor
means less heat is being conducted through the non-com-
bustible material to the combustible material beneath it. The
R value of a material must be equal or larger then the re-
quired R value to be acceptable.
Converting k to R:
Divide 1 by k and multiply the results times the thickness in inch-
es of the material.
R = 1/k x inches of thickness
Converting R to k:
Divide the inches of thickness by R.
k = inches of thickness/R
Calculations:
Example: Floor protection requires k value of 0.84 and /4 inch
thick.
Alternative material has a k value of 0.6 and is /4 inch thick.
Divide 0.6 by .75 = k value of 0.80. This k value is smaller than
0.84 and therefore is acceptable.
WARNING
• Do NOT connect this unit to a chimney
flue servicing another appliance.
• Do NOT connect to any air distribution
duct or system.
May allow flue gases to enter the house.
Asphyxiation Risk.
DESIGN, INSTALLATION & LOCATION
Consideration must be given to:
•
Safety
•
Convenience
•
Traffic flow
•
Chimney and chimney connector required
It is a good idea to plan your installation on paper, using exact
measurements for clearances and floor protection, before
actually beginning the installation. If you are not using an
existing chimney, place the appliance where there will be a
clear passage for a factory-built listed chimney through the
ceiling and roof.
We recommend that a qualified building inspector and your
insurance company representative review your plans before
and after installation.
If this appliance is in an area where children may be near it is
recommended that you purchase a decorative barrier to go
in front of the appliance.
Remember to always keep children
away while it is operating and do not let anyone operate
this appliance unless they are familiar with these operating
instructions.
• Installation and use of any damaged appliance.
• Modification of the appliance.
• Installation other than as instructed by Hearth & Home
Technologies.
• Installation and/or use of any component part not approved
by Hearth & Home Technologies.
• Operating appliance without fully assembling all
components.
• Operating appliance without legs attached (if supplied with
unit).
• Do NOT Overfire - If appliance or chimney connector glows,
you are overfiring.
Any such action that may cause a fire hazard.
WARNING
Fire Risk.
Hearth & Home Technologies disclaims any
responsibility for, and the warranty will be
voided by, the following actions:
Inspect appliance and components for damage.
Damaged parts may impair safe operation.
WARNING
• Do NOT install damaged components.
• Do NOT install incomplete components.
• Do NOT install substitute components.
Report damaged parts to dealer.
Fire Risk.
