37
LENNOX HEARTH PRODUCTS • MERIT PLUS
®
DIRECT VENT GAS FIREPLACES (MPDP35/40) • 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 inch [305 mm]
compressed flex vent**)
77L88 SFKIT18S Square Term. for flex
(with 18 inch [457 mm]
compressed flex vent**)
77L89 SFKIT24S Square Term. for flex
(with 24 inch [610 mm]
compressed flex vent**)
77L90 SFKIT36S Square Term. for flex
(with 36 inch [914 mm]
compressed flex vent**)
77L91 SFKIT48S Square Term. for flex
(with 48 inch [1219 mm]
compressed flex vent**)
INSTALLATION ACCESSORIES CONTINUED
**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 in. (114 mm)
for flex (6 pack)
91L67 SFGC7-6 Gear Clamp 7.5 in. (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.
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