Technical Specifications

HIGHEFFICIENCY DIRECTVENT FURNACES
0743512 0743511 7,400 5,500 74 72 18 ⅞ 6 ¾ 22 ¼ – – BUILT-IN 44
1773512 1773511 17,700 13,500 76 76 21 ¾ 8 ¼ 28 ⅛ 129 86 BUILT-IN 57
BTU/hr.
INPUT
BTU/hr.
OUTPUT
SHIPPING
WEIGHT
(LBS.)
PROPANE
NATURAL
MODEL NUMBER
AFUE
THERMAL
EFFICIENCY PER CENT
DEPTH
WIDTH
DIMENSIONS (INCHES)
HEIGHT
UNIQUE WALLMOUNT DESIGN
Furnaces require no floor space.
“MATCHLESS” PILOT IGNITER
Assures convenient pilot lighting without matches.
REQUIRES NO ELECTRICITY
MODELS: 0743512 / 0743511
PROGRAMMABLE TIMER
A programmable thermostat in your
home is one of the easier ways to save
energy and money. On/Off, seven-day
timer/clock.
SUMMERTIME VENTILATION
A two-speed recirculating fan will move
the cool air off the floor and circulate it
throughout your home, keeping it
more comfortable.
TERMINATION CAP FLUE
Small, low-profile termination cap
goes on the exterior of the building.
• Read owner’s manual before using/installing.
• Photographs are representative only.
• Check local codes and ordinances for permitted uses.
• Consult installation manual for clearances prior to installation.
• We reserve the right to amend product specifications without notice.
• Installation and servicing recommended by a qualified service person.
• Please read the warranty for any limitations of disclaimers. Combustion chamber
carries a 10-year limited warranty. All other parts carry a one-year limited warranty.
• Venting must comply with the “Venting and Chimney Requirements”
section of the instruction manual.
• Massachusetts Approval G3-0218-317.
Elevation rating from sea level to 2,000' but may be derated up to a maximum of 5,500' 1/2 Gas Connection
INTERIOR FURNACE CLEARANCES
MODELS: 0743512  0743511
2 from an intersecting wall.
¼ from unit to back of wall (0” to spacers).
2 to finished floor.
10 from the top of the appliance to the ceiling
or other obstructions or combustibles.
19 ½ maximum wall thickness.
MODELS: 1773512  1773511
3 ⅛ from an intersecting wall.
0 from unit to back of wall.
2 from finished floor.
10 from the top of the appliance to the
ceiling or other obstructions or combustibles
19 ⅝ maximum wall thickness.
ACCESSORIES
VENT ADAPTER MODEL 9399
The Vent Adapter Accessory is used to
compensate for the extra space left
around the vent hole when replacing a
furnace with a larger vent opening. It
can also be used to extend the flue
terminal on homes with vinyl siding so
that the vent cap will be flush against
the edge of the siding.
GAS LINE KIT 8966 - gas to propane gas for MODEL 0743512
250 W. Laurel Street  Colton, CA 92324 USA Subject to change without notice © 2020 Williams L1457, 6_20
IMPORTANT
FEATURES
THERMOSTAT
ELECTRICAL
LOAD (W)
CFM
120V
WARNING: This product can expose you to chemicals including epichlorohydrin
which is known to the State of California to cause cancer and birth defects and/or
other reproductive harm. For more information go to www.p65warnings.ca.gov
DIRECTVENT SAFETY
For clean, comfortable
heat when and where
you want it. The gas
flame is completely
sealed inside, away
from all contact with
room air. Air necessary
for combustion
is drawn into the
chamber from outside
through the vent, and
combustion products
are vented directly
to the outside. Only
clean, gentle heat, in
continuous circulation
is de livered into the
room. Windows and
doors stay closed
because no room air is
used for combustion.
WARM AIR
TO HEAT
ROOM
FRESH AIR
FROM
OUTSIDE
EXTERIOR WALL
COMBUSTION
AIR OUTLET
OUTSIDE
COOL ROOM
AIR