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You are here: Home > In-Direct Vent Heaters > Gravity Vented Wall Furnaces Sort By: Price: Low to High Price: High to Low Most Popular Title Manufacturer Newest Oldest 10 per page 20 per page 40 per page 60 per page 100 per page Page of 1   GWT-50 NG - 50000 BTU - Single/Double Wall Gravity Heater - Natural Gas (NG) Our Price: $859.99 50000 BTU Input - 66+% efficiency - For use with Natural Gas - Vent Thru Chimney or Flue - May be recessed between wall studs - May be installed on inside or outside walls - Air Intake from inside air - Built-in Thermostat - Dual Wall Heater - No Electricity Required GWT-50 LP - 50000 BTU - Single/Double Wall Gravity Heater - Propane Gas (LP) Our Price: $859.99 50000 BTU Input - 66+% efficiency - For use with Propane Gas - Vent Thru Chimney or Flue - May be recessed between wall studs - May be installed on inside or outside walls - Air Intake from inside air - Built-in Thermostat - Dual Wall Heater - No Electricity Required GWT-35 LP - 35000 BTU - Single Wall Gravity Heater - Propane Gas (LP) Our Price: $664.99 35000 BTU Input - 66+% efficiency - For use with Propane Gas - Vent Thru Chimney or Flue - May be recessed between wall studs - May be installed on inside or outside walls - Air Intake from inside air - Built-in Thermostat - No Electricity Required GWT-35 NG - 35000 BTU - Single Wall Gravity Heater - Natural Gas (NG) Our Price: $664.99 35000 BTU Input - 66+% efficiency - For use with Natural Gas - Vent Thru Chimney or Flue - May be recessed between wall studs - May be installed on inside or outside walls - Air Intake from inside air - Built-in Thermostat - No Electricity Required GWT-25 NG - 25000 BTU - Single Wall Gravity Heater - Natural Gas (NG) Our Price: $629.99 25000 BTU Input - 66+% efficiency - For use with Natural Gas - Vent Thru Chimney or Flue - May be recessed between wall studs - May be installed on inside or outside walls - Air Intake from inside air - Built-in Thermostat - No Electricity Required GWT-25 LP - 25000 BTU - Single Wall Gravity Heater - Propane Gas (LP) Our Price: $629.99 25000 BTU Input - 66+% efficiency - For use with Propane Gas - Vent Thru Chimney or Flue - May be recessed between wall studs - May be installed on inside or outside walls - Air Intake from inside air - Built-in Thermostat - No Electricity Required