NT-20S / NT-20SQT Ducted Suburban Furnace. This Is A Ducted Model Furnace Which Gives Out Better Heat Distribution. 20,000 BTU. Low Amp Draw. Sealed Forced Draft Combustion Chamber. Energy Saving Solid State Electronic Ignition.
Connect the gas line, 4 wires and the air intake/exhaust and you’re done. The fan starts immediately with no lag and the heat is perfect. This furnace is smaller than my 30 year old unit but the basic dimensions are the same.