Lennox Hearth EN54-VDLPM Horizontal Vent Figures/Tables Continued, Table D, V Minimum, feet

HORIZONTAL VENT FIGURES/TABLES (CONTINUED)

	**Wall
	Firestop/Spacer
	H
H1	V*
***Note - When using
Secure Flex, use	**Wall
Firestop/Spacer SF4.5VF
	Firestop/Spacer

TABLE D

H + H1 Maximum		V Minimum
feet	(meters)	feet	(meters)
5	(1.524)	1	(0.305)
10	(3.048)	2	(0.610)
15	(4.572)	3	(0.914)
20	(6.096)	4	(1.219)

**Use Firestop/Spacer SV4.5HF or SF4.5HF when using Secure Vent or Secure Flex respectively. Use Firestop/Spacer SV4.5HF5 or SF4.5HF5 when using Secure Vent or Secure Flex on horizontal vent runs for the MPLDV35/40/45 with a center line lower than 48” (1219 mm) above the fireplace top wrapper surface. In all cases the firestop/spacer provided with the termination may be used with the termination, frame to 5” clearance where applicable.

***Ceiling

Firestop/Spacer

(SV4.5VF)

Support Bracket

*To Top Surface Of

Fireplace

V + H + H1 = 40 feet (12.2 m) Max.

H+ H1 = 20 ft. (6.096 m) Max.

Example: If 20 feet of (H) horizontal vent run is needed, then 4 feet minimum of (V) vertical vent will be required.

This table shows a 1 (V) to 5 (H) ratio. For every 1 foot of (V) vertical, you are allowed 5

Square termination (SV4.5HT-2) shown.

See Table 3 on page 18 as an aid in venting component selection for a particular range of exterior wall thicknesses.

feet of (H) horizontal run, up to a maximum horizontal run of 20 feet.

Figure 32 - Top Vent - TWO 90 DEGREE ELBOWS - ELBOW CONNECTION NOT DIRECTLY AT APPLIANCE

H1

***Wall

Firestop/Spacer

V1

**When using Secure Flex, use Firestop/Spacer SF4.5VF

**Ceiling

Firestop/Spacer

(SV4.5VF)

H

TABLE E

H + H1 Maximum			V + V1 Minimum
feet		(meters)	feet	(meters)
5		(1.524)	1	(0.305)
10		(3.048)	2	(0.610)
15		(4.572)	3	(0.914)
20		(6.096)	4	(1.219)
	H + H1 = 20 feet (6.096 m) Max.

V + V1+ H + H1 = 40 ft. (12.192 m) Max.

***Use Firestop/Spacer SV4.5HF or SF4.5HF when using Secure Vent or Secure Flex respectively. Use Firestop/Spacer SV4.5HF5 or SF4.5HF5 when using Secure Vent or Secure Flex on horizontal vent runs for the MPLDV35/40/45 with a center line lower than 48” (1219 mm) above the fireplace top wrapper surface. In all cases the firestop/spacer provided with the termination may be used with the termination, frame to 5” clearance where applicable.

**Ceiling

***Wall Firestop/Spacer

Firestop/Spacer (SV4.5VF)

Support Bracket

*To Top Surface

Of Fireplace

V*

Example: If 20 feet of (H) horizontal vent run is needed, then 4 feet minimum of (V) vertical vent will be required.

This table shows a 1 (V) to 5 (H) ratio. For every 1 foot of (V) vertical, you are allowed 5 feet of (H) horizontal run, up to a maxi- mum horizontal run of 20 feet.

20

Square termination (SV4.5HT-2) shown.

See Table 3 on page 18 as an aid in venting component selection for a particular range of exterior wall thicknesses.

Figure 33 - Top Vent - THREE 90 DEGREE ELBOWS - ELBOW CONNECTION NOT DIRECTLY AT APPLIANCE

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.