Cumberland Gap Wood Stove

A.Hearth Protection Requirements (Cont'd)

SIDE FUEL DOOR LOCKED SHUT - USA ONLY

52"

 

coverage

optional

-5/8"

34

 

optionalcoverage

52"

optionalcoverage

 

fuel

door

 

Front

 

 

loading

 

 

 

16"

-5/8”

8"

required

38

 

 

 

8"

coverage

-3/8" 30

R

B. 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 mate- rial must be equal or smaller then the required k value to be acceptable.

(BTU) (inch) (foot2 (hour) (oF)

Thermal Resistance: R value

The R value is a measure of a material’s resisteance 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

Figure 12.1

BOTH FUEL DOORS ACCESSIBLE - USA ONLY

53-7/16"

optional coverage

48-7/16"

 

 

 

optional coverage

38-5/8"

44-3/4"

 

 

optional

 

coverage

Fuel loading

16"

door

 

 

8"

16"

25-3/4"

 

 

 

 

required coverage

 

11-1/8"

 

18-5/8"

 

 

 

 

 

 

 

Figure 12.2

less heat is being conducted through the non-combustible ma- terial to the combustible material beneath it. The R value of a material must be equal or larger then the required 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

Calculatons:

Example: Floor protection requires k value of 0.84 and 3/4 inch thick.

Alternative material has a k value of 0.6 and is 3/4 inch thick.

Divide 0.6 by .75 = k value of 0.80. This k value is smaller than 0.84 and therefore is acceptable.

HORIZONTAL VENTING

NOTE:

Illustrations and photos reflect typical installations and are FOR DESIGN PURPOSES ONLY.

Illustrations/diagrams are not drawn to scale.

Actual installation may vary due to individual design preference

Hearth & Home Technologies reserves the right to alter its products.

Floor protection must extend length of flue and 2 inches (51mm) beyond each side of pipe (shaded area)

USA - Required

CANADA - Recommended

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7006-188G

November 5, 2010

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Quadra-Fire CUMPGAP-PMH, CUMBGAP-MBK Calculating Alternate Floor Protection Material, USA Required Canada Recommended

CUMBGAP-MBK, CUMPGAP-PMH specifications

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