Less than 90% Efficiency Gas Furnaces

143 Products
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Heating BTU
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AFUE (%) Learn More
AFUE (%)
AFUE (Annual Fuel Utilization Efficiency) measures the efficiency of combustion equipment over the entire heating season, and is calculated by dividing the amount of energy that is actually heating your home by the total energy contained in the fuel used by the boiler/furnace.
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Vent Type Learn More
Vent Type
Products that use combustion (burning) of fuel to create heat also create potentially dangerous gasses that need to be exhausted (AKA "Vented"). Depending on the product, venting can be done via a chimney, through a side wall, or use a second vent to provide fresh air to the appliance.
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Configuration Learn More
Configuration
Orientation describes the direction that air will flow through a piece of equipment. (e.g. air will flow horizontally through a "Horizontal" unit heater.) Most equipment will only function properly if installed in the proper orientation.
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Fuel Type Learn More
Fuel Type
To create heat, some form of fuel is required. Fuel Type specifies what the product uses as an input to create heat.
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Modulating/Staging Learn More
Modulating/Staging
Stages are unique speeds or levels that equipment can operate at. More stages allow for better fine-tuned control of output, which improves comfort and efficiency. Modulating equipment can operate across a range of levels, giving the highest level of fine-tuned control.
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Blower Motor Type
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Low NOx Emissions Learn More
Low NOx Emissions
NOx is a byproduct of the combustion process, and it's output is regulated in some jurisdictions. Many regulators mirror SCAQMD rules, which regulate air quality for some parts of Southern California. Low NOx appliances emit less than 40 ng/J (nanogram per Joule) of NOx.
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Ultra Low NOx Emissions Learn More
Ultra Low NOx Emissions
NOx is a byproduct of the combustion process, and it's output is regulated in some jurisdictions. Many regulators mirror SCAQMD rules, which regulate air quality for some parts of Southern California. Ultra Low NOx appliances emit less than 10-14 ng/J (nanogram per Joule) of NOx.
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High Efficiency Upflow/Horizontal Blower with 1200 Max CFM. Natural Gas with Low NOx Emissions. 17.5 Cabinet Width.
Item#: 157325
Model#: GR9T800603BN
Brand: Goodman
Originally $1,425.00
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High Efficiency Downflow/Horizontal Blower with 1200 Max CFM. Natural Gas with Low NOx Emissions. 14 Cabinet Width.
Item#: 157342
Model#: GD9S800603AN
Brand: Goodman
Originally $1,268.00
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High Efficiency Downflow/Horizontal Blower with 1600 Max CFM. Natural Gas with Low NOx Emissions. 17.5 Cabinet Width.
Item#: 157344
Model#: GD9S800804BN
Brand: Goodman
Originally $1,470.00
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High Efficiency Downflow/Horizontal Blower with 1600 Max CFM. Natural Gas with Low NOx Emissions. 17.5 Cabinet Width.
Item#: 157352
Model#: GD9T800804BX
Brand: Goodman
Originally $1,586.00
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High Efficiency, Multi-Speed Downflow Blower. Natural Gas. 19-3/4" Cabinet Width. Pair with up to 4 Ton A/C or Heat Pump.
Item#: 163196
Brand: Revolv
Sale: $1,462.05
On Sale Through 05/31
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Factory-Direct
High Efficiency, Multi-Speed Downflow Blower. Natural Gas. 19-3/4" Cabinet Width. Pair with up to 4 Ton A/C or Heat Pump.
Item#: 163200
Brand: Revolv
Sale: $1,547.79
On Sale Through 05/31
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Factory-Direct
High Efficiency, Multi-Speed Downflow Blower. Natural Gas. 19-3/4" Cabinet Width. Pair with up to 4 Ton A/C or Heat Pump.
Item#: 163202
Brand: Revolv
Sale: $1,702.12
On Sale Through 05/31
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Factory-Direct
High Efficiency Upflow/Horizontal Blower with 1200 Max CFM. Natural Gas with Low NOx Emissions. 14 Cabinet Width.
Item#: 117088
Model#: GM9S800603AX
Brand: Goodman
Originally $1,107.00
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High Efficiency Upflow/Horizontal Blower with 1600 Max CFM. Natural Gas with Low NOx Emissions. 17.5 Cabinet Width.
Item#: 157313
Model#: GR9S800804BX
Brand: Goodman
Originally $1,377.00
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$1,418.00
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Williams - 0743512 - 7,400 BTU - Direct Vent Wall Furnace - Liquid Propane - 72% AFUE - Single Stage
Item#: 62311
Model#: 0743512
Brand: Williams
$1,402.00
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Williams - 1773511 - 17,700 BTU - Direct Vent Wall Furnace - Liquid Propane - 81% AFUE - Single Stage
Item#: 62312
Model#: 1773511
Brand: Williams
Sale: $1,890.50
On Sale Through 05/31
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Sale: $2,231.55
On Sale Through 05/31
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$2,723.00
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Variable Speed Upflow/Horizontal Blower with 1,600 Max CFM. Natural Gas with Low NOx Emissions. 17.5" Cabinet Width.
Item#: 100101
Model#: GMVC800604BX
Brand: Goodman
Originally $1,909.00
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Variable Speed Upflow/Horizontal Blower with 1,600 Max CFM. Natural Gas. 21" Cabinet Width.
Item#: 100103
Model#: GMVC800804CN
Brand: Goodman
Originally $2,001.00
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Variable Speed Upflow/Horizontal Blower with 2,000 Max CFM. Natural Gas. 21" Cabinet Width.
Item#: 100105
Model#: GMVC800805CN
Brand: Goodman
Originally $2,053.00
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Variable Speed Upflow/Horizontal Blower with 2,000 Max CFM. Natural Gas. 24.5" Cabinet Width.
Item#: 100107
Model#: GMVC800805DN
Brand: Goodman
Originally $2,071.00
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High Efficiency Downflow/Horizontal Blower with 1600 Max CFM. Natural Gas with Low NOx Emissions. 14 Cabinet Width.
Item#: 117074
Model#: GC9S800603AX
Brand: Goodman
Originally $1,118.00
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High Efficiency Upflow/Horizontal Blower with 1200 Max CFM. Natural Gas with Low NOx Emissions. 17.5 Cabinet Width.
Item#: 117089
Model#: GM9S800603BN
Brand: Goodman
Originally $1,109.00
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High Efficiency Upflow/Horizontal Blower with 1600 Max CFM. Natural Gas with Low NOx Emissions. 17.5 Cabinet Width.
Item#: 117092
Model#: GM9S800604BX
Brand: Goodman
Originally $1,136.00
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High Efficiency Upflow/Horizontal Blower with 2000 Max CFM. Natural Gas with Low NOx Emissions. 21 Cabinet Width.
Item#: 117099
Model#: GM9S800805CN
Brand: Goodman
Originally $1,267.00
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High Efficiency Upflow/Horizontal Blower with 2000 Max CFM. Natural Gas with Low NOx Emissions. 21 Cabinet Width.
Item#: 117102
Model#: GM9S801005CX
Brand: Goodman
Originally $1,416.00
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High Efficiency Upflow/Horizontal Blower with 2000 Max CFM. Natural Gas with Low NOx Emissions. 21 Cabinet Width.
Item#: 117307
Model#: GM9C800805CN
Brand: Goodman
Originally $1,416.00
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