Quadra-Fire CB1200I-B CB1200-I Pellet Insert Masonry Minimum Opening, Floor Protection

CB1200-I Pellet Insert	R
E. Masonry Minimum Opening	G. Calculating Alternate Floor Protection Material

B	C
	A
	D

	Location	Inches	Millimeters
A	Rear Width	22	558
B	Depth	13	330
C	Height - Top Vent	19-1/2	495
D	Front Width	29-1/4	743

F. Floor Protection

1.Zero Clearance Installations*

It is necessary to install a floor protection of non-combus- tible material with a R value of 3.0 (1 inch [25mm] minimum thickness with a “k” value of 0.58) or a 1 inch (25mm) air space between insert base and hearth.

2.Non-Zero Clearance Installations*

A non-combustible floor protector is required with a mini- mum R value of 3.0 (1 inch [25mm] minimum thickness with a “k” value of 0.58) extending 6 inches (153mm) in front of the insert and 8 inches (203mm) to each side of the door opening.

* See alternate floor protection worksheet.

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) (foot2 (hour) (oF)

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 materi- al 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 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.

Page 10 7014-083C October 26, 2006