Planning your installation – Lenoxx Electronics CI2000HT User Manual

Page 5

Advertising
background image

PLANNING YOUR INSTALLATION

– Model CI1000HT

PAGE 5

Top View

FOR INSTALLATIONS IN THE USA

MODEL CI1000HT

FLOOR PROTECTION

The floor protector must meet or exceed the minimum ther-

mal requirements as defined on this page (see Floor Protec-

tion Using Alternate Material As Floor Protector). If the floor

protection is to be stone, tile, brick, etc., it must be mortared

or grouted to form a continuous noncombustible surface. If a

chimney connector extends

horizontally over the floor,

protection must also cover

the floor under the

connector and at least 2"

(51 mm) to either side.

The floor protector must

fully cover the area

beneath the appliance

and extend 18” to the

front, 5.2” to the sides,

and 0” from the back as

shown in the illustration

to the right.

FLOOR PROTECTION
USING ALTERNATE MATERIAL AS FLOOR PROTECTOR

The hearth pad or alternate material used as a floor protec-

tor must be constructed of a durable noncombustible mate-

rial having an equal or better thermal conductivity value

(lower k value) of k = .84 BTU / IN FT

2

HR

°F or a thermal

resistance that equals or exceeds r = 1.19 HR

°F FT

2

IN/BTU with a minimum thickness of 1/2”. With these val-

ues, determine the minimum thickness of the alternate ma-

terial required using the formula(s) and the table shown

here (see chart – Approved Alternative Materials for Floor

Protection).

Note: Any noncombustible material having a thickness of

1/2” (13 mm) whose k value is less than .84 or whose r

value is more than 1.19 is acceptable. If the alternate mate-

rial used has a higher k value or lower r value will require a

greater thickness of the material used. In some cases, if the

k value is less or the r value higher, a thinner material may

be used.

Methods of determining floor protection equivalents:

To determine the thickness required for the alternate mate-

rial when either the k value or r value is known, use either

the k formula or r formula:

Example: Durock

 Cement Board is to be used for the floor

protection. How thick must this material be? The following

formulas give the means of determining minimum thickness

required.

T

M

= minimum thickness required for alternate material

k

M

= k value per inch of alternate material

T

L

= minimum thickness of listed material

r

M

= r value per inch of alternate material

Using the k formula:

Desired Thickness

k value of desire

Minimu

of the alternate

=

material (per inch) x thickness

material

k value of listed

of listed

material (per inch)

material

T

M

(inches) = kM x T

L

.84

T

M

(inches) = 1.92 x 1/2”

.84

Answer using k: 2.286 x 0.50” = 1.143 = ~ 1 9/64”
1 9/64” thickness Durock Cement Board will be required.

Using the r formula:

T

M

(inches) = 1.19 x T

L

r

M

T

M

(inches) = 1.19 x .5”

.52

Answer using r: 2.288 x 0.50” = 1.143 = ~ 1 9/64”
1 9/64” thickness Durock Cement Board will be required.

At times it is important to know what combination of materials are

acceptable for use as floor protection. The “R values” are used to

determine acceptable combinations of materials because “R val-

ues” are additive where r and k values are not.

“R value” = 1 = r x thickness of material used

k

Example: “R value” = 1/k = r x thickness of material used. Given

that the required “R value” for a suitable floor protector used must be

equal to or greater than:“R” = r x T

L

= 1.19 x .5” = .60.

Listed Material

Listed Material

Thermal Values

Listed Min.

Thickness

k (per inch)

r (per inch)

T

L

Listed Material

.84

1.19 1/2”

Approved Alternate Materials for Floor Protection (**)

Alternative
Materials

Thermal Values

* Minimum

Thickness

k (per inch)

r (per inch)

T

M

Kaowool M Board

.47

2.13

* 1/2”

Micore 160

 .35

2.86

* 1/2”

Micore 300

 .46

2.18

* 1/2”

Durock

 Cement Board

1.92

.52

1 3/16”

Hardibacker

 1.95

.51

1

3/16”

Hardibacker 500

 2.30 .44 1

3/8”

Cultered Stone
Hearthstone

2.82 .35

1

11/16”

Wonderboard 3.23

0.31

1

15/16”

Face brick

9.00

0.11

5 3/8”

Common brick

5.00

0.20

3”

Cement mortar

5.00

0.20

3”

Ceramic tile

12.5

.08

7 ½”

Marble

~

20.0

~

.05 11

15/16”

Note: To convert inches to millimeters divide by .03937.

(*) After minimum thickness is calculated, the thickness can
be no less than 1/2” (13mm).

(**) If the floor protector to be used is a noncombustible ma-
terial and is NOT listed on this chart on this page, the manu-
facturer of the material must provide either the listed k-value
per inch or r-value per inch and the minimum thickness will
need to be calculated per instructions on this page.

5.2"

(132 mm)

5.2"

(132 mm)

18" (457 mm)

0 "

(0 mm)

Advertising
This manual is related to the following products: