Hearth and Home Technologies CD4236MR, CD4842MR, CD4842MIR Minimum Clearances for Termination

D

E

V

LB C

V	Fixed
	Closed

F V

B

H

O

N

V

B V

VOpenable Fixed Closed

	V		B
B		J	X
		A	GAS METER

			G
			V
	M		V
I	V	K X
			A

V TERMINATION CAP

Measure vertical clearances from this surface

T

X AIR SUPPLY INLET

Q P

V

R

S

RESTRICTION ZONE (TERMINATION NOT ALLOWED)

V U

V

W

Electrical Service

D*

V

U

V

Measure horizontal clearances	Covered Alcove
	Applications
from this surface.

Clearances to Electrical Service

Dimension Descriptions

AClearance above the ground, a veranda, porch, deck or balcony - 12 in. (30 cm) minimum. *

BClearance to window or door that may be opened – 10,000 BTUs or less, 6 in. (15 cm) minimum; 10,000-50,000 BTUs, 9 in. (23 cm) minimum; over 50,000 BTUs, 12 in. (30 cm) minimum. *

CClearance to permanently closed window – 12 in. (30 cm) minimum - recommended to prevent condensation on window.

DVertical clearance to ventilated soffit located above the termination within a horizontal distance of 2 ft (60 cm) from the centerline of the termination

– 18 in. (46 cm) minimum. **

EVertical clearance to unventilated soffit - 12 in. (30 cm) minimum. **

FClearance to outside corner - 6 in. (15 cm) minimum.

GClearance to inside corner - 6 in. (15 cm) minimum.

HNot to be installed above a meter/regulator assembly within 3 ft (90 cm) horizontally* from the center line of the regulator (Canada only)

IClearance to service regulator vent outlet – 3 ft (.91 m) U.S. minimum and 3 ft (.91 m) Canada minimum. *

JClearance to non-mechanical air supply inlet into building or the combustion air inlet to any other appliance – 9” (23 cm) U.S. minimum and 12 in. (30 cm) Canada minimum. *

KClearance to mechanical air supply inlet - 3 ft (.91 m) U.S. minimum and 6 ft (1.8 m) Canada minimum. *

LClearance above a paved sidewalk or paved driveway located on public property - 7 ft (2.1 m) minimum.

A vent may not terminate directly above a sidewalk or paved driveway which is located between two single family dwellings and serves both dwellings.

MClearance under veranda, porch, deck or balcony - 12 in. (30 cm) minimum. * Recommended 30 in. (76 cm) for vinyl or plastic.

Only permitted if veranda, porch, deck or balcony is fully open on a minimum of 2 sides beneath the floor. *

NVertical clearance between two horizontal termination caps – 12 in. (30 cm) minimum.

OHorizontal clearance between two horizontal termination caps – 12 in. (30 cm) minimum.

Figure 6.4 Minimum Clearances for Termination

P6” - Non-vinyl sidewalls 12” – Vinyl sidewalls

Q18” – Non-vinyl soffit and overhang 42” – Vinyl soffit and overhang

R8 ft.

	S min	T max
1 cap	3 ft	2 x S actual
2 caps	6 ft	1 x S actual
3 caps	9 ft	2/3 x S actual
4 caps	12 ft	1/2 x S actual
S min = # term caps x 3	T max = (2/# term caps) x S (actual)

U6” min. – Clearance from sides of electrical service. W 12” min. – Clearance above electrical service.

* As specified in CGA B149 Installation Codes

Note: Local codes or regulations may require different clearances. ** Clearance required to vinyl soffit material – 30 in. (76 cm) minimum.

Note: Location of the vent termination must not interfere with access to the electrical service.

WARNING!

In the U.S.: Vent system termination is NOT permitted in screened porches. You must follow side wall, overhang and ground clearances as stated in the instructions.

In Canada: Vent system termination is NOT permitted in screened porches. Vent system termination is permitted in porch areas with two or more sides open. You must follow all side wall, overhang and ground clearances as stated in the instructions.

Hearth & Home Technologies assumes no responsibility for the improper performance of the appliance when the venting system does not meet these requirements.

CAUTION: IF EXTERIOR WALLS ARE FINISHED WITH VINYL SIDING, IT IS SUGGESTED THAT A VINYL PROTECTOR KIT BE INSTALLED.

Heatilator • Caliber Mesh CD Series-SIT Valve • 4040-849 Rev J • 06/08 21