36
LENNOX HEARTH PRODUCTS • MERIT PLUS
®
DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Listed Secure Flex
®
Components
Cat. #
Model
description
H1969
SF4.5HT-2
Horizontal Square Termina-
tion for
flex
(without flex
vent)
77L87
SFKIT12S
Square Term. for
flex
(with
12" [305 mm] compressed
flex vent**)
77L88
SFKIT18S
Square Term. for
flex
(with
18" [457 mm] compressed
flex vent**)
77L89
SFKIT24S
Square Term. for
flex
(with
24" [610 mm] compressed
flex vent**)
77L90
SFKIT36S
Square Term. for
flex
(with
36" [914 mm] compressed
flex vent**)
77L91
SFKIT48S
Square Term. for
flex
(with
48" [1219 mm] compressed
flex vent**)
94L04*
SFKIT12SS
Small Square Termination for
flex
, with 12" (305 mm) of
compressed flex vent**
(Ref. Instr. #750204M)
94L05*
SFKIT18SS
Small Square Termination for
flex
, with 18" (457 mm) of
compressed flex vent**
(Ref. Instr. #750204M)
94L06*
SFKIT24SS
Small Square Termination for
flex
, with 24" (610 mm) of
compressed flex vent**
(Ref. Instr. #750204M)
94L07*
SFKIT36SS
Small Square Termination for
flex
, with 36" (914 mm) of
compressed flex vent**
(Ref. Instr. #750204M)
94L08*
SFKIT48SS
Small Square Termination for
flex
, with 48" (1219 mm) of
compressed flex vent**
(Ref.
Instr. #750204M)
94L09*
SF-HTSS
Horizontal Small Square
Termination for
flex
, without
flex vent
(Ref. Instr. #750204M)
INSTALLATION ACCESSORIES CONTINUEd
*
Only for use with MPdT33 and MPd35 models.
**
All compressed flex vents can be expanded up to two times.
Listed Secure Flex
®
Components
Cat. #
Model
description
These termination kits include firestop/spacer, gear clamps and flex adaptor.
60L10
SF-18
18 feet (5.49 m) *
compressed
flex
(Ref. Instr. #750053M)
98K03
SF-12
12 feet (3.66 m)*
compressed
flex
(Ref. Instr.
#750052M)
H2248
SF4.5HF-10
Firestop / Spacer -
Horizontal,
flex
(3-1-1
spacing), 10 Pack
H2249
SF4.5VF-10
Firestop/Spacer - Vertical,
flex
(1-1-1 spacing), 10 Pk
56L74
SFVT30
Vertical Termination for
flex
(flat to 6/12) with flex adaptor,
section of rigid vent, roof
support collar assembly, roof
flashing and storm collar.
(Ref. Instr. #750052M)
56L75
SFVT45
Vertical Termination for
flex
(6/12 to 12/12) with flex
adaptor, section of rigid
vent, roof support collar
assembly, roof flashing,
and storm collar.
(Ref. Instr.
#750052M)
91L66
SFGC4-6
Gear Clamp 4.5" (114 mm)
for
flex
(6 pack)
91L67
SFGC7-6
Gear Clamp 7.5" (190.5 mm)
for
flex
(6 pack)
H7748
H7748
36"
Flex
Connector Kit. 36"
of flex with two adaptors
for mating two rigid
sections of vent together.