Specification

Primary Heat Exchanger
The tubular design extracts heat from
combustion gases; made of heavy
gauge aluminized steel, it’s resistant
to corrosion and thermal fatigue,
and is covered by a limited lifetime
warranty
Hot Surface Ignition
Quiet and automatic, it eliminates
the need for a standing pilot light,
offering improved efficiency
Draft Inducer
Specially designed for the tubular
heat exchanger, it pulls hot
combustion gases through the
exchanger; heated air is locked in
while cold air is locked out
30 Second Blower Delay
The delay assures a warm duct
temperature at furnace start-up;
blower off settings can be adjusted to
60, 90 120 and 180 seconds
Efcient Blower
Multi-speed, high static blower
delivers warm air throughout the
house quietly and efficiently, for a
wide range of cooling capacities
Space Saving, Energy Saving Gas Heat Source
A.F.U.E. Ratings of 95% mean energy savings for you!
In-Shot Burner
Engineered to provide the most
efficient air/gas mixture for
combustion, the shutter-free design
requires no adjustments to regulate
the mix
Integrated Furnace
Control (IFC)
Controls are integrated into one
board set up for fast, easy
installation, it includes connections
for an electronic air cleaner and
dehumidifier; features on-board
diagnostics with easy to recognize
faults codes so there’s no need to
count flashes
Secondary Heat Exchanger
Made of stainless steel for durability,
the secondary heat exchanger
extracts additional heat (which would
be lost by less efficient furnaces);
it is covered by a limited lifetime
warranty
Low Pole Cabinet
Painted galvanized steel cabinet
resists corrosion; lightweight 34½”
design saves on space; two piece
door has “captured” screws to
prevent their loss
NOTE: Upflow model shown. Downflow
and horizontal models feature same
components in a different configuration.
Horizontal installation is for right side
only with air supply on the left.
Upflow Models Input BTUH
Heating Cap.
BTUH AFUE
GUH95A038B4 38,000 36,100 95.0%
GUH95A054B4 54,000 51,300 95.0%
GUH95A072C5 72,000 68,400 95.0%
GUH95A090C5
90,000 85,500 95.0%
GUH95A108D5 108,000 102,600 95.0%
GUH95A120D5 120,000 114,000 95.0%
Downflow Models Input BTUH
Heating Cap.
BTUH AFUE
GDD95A054B4 54,000 51,300 95.0%
GDD95A072C5 72,000 68,400 95.0%
GDD95A090C5 90,000 85,500 95.0%
GDD95A118D5 120,000 112,100 95.0%
7
Can be converted to LP gas by qualified
contractor using a conversion kit shown in
“Accessories” on page 6.