Napoleon NSM120S5A 120,000 BTU Single Stage Natural Gas Furnace

  • Napoleon NSM120S5A 9500 Series 120,000 BTU Single Stage Gas Furnace
  • Featuring a Very Efficient 95% AFUE & Whisper Quiet Operation with a Sound Absorbing Cabinet
Availability: Discontinued
List Price: $2749.00
Price Break: $634.00
Our Price: $2115.00


Enjoy reliable, safe and efficient heat in your home with the Napoleon NSM120S5A natural gas heater with 120,000 BTUs of power. This models covers the most area in the 9500 series and features the multi-speed PSC motor. Even with so much power it still has a very small cabinet standing at 32 7/8". This Napoleon furnace would make a great addition to your home.

Lower Utility Bills
After installing a high efficiency furnace heater you'll be able to see a drop in your utility bill. The aluminized-steel tubular triple-pass heat exchanger has been carefully designed to maximize heat transfer. The aluminized multi-port in shot burners perfectly shape the flame cone for maximum flame efficiency.

Constant Self Monitoring
The Napoleon NSM120S5A home furnace features a self diagnostic integrated furnace control (IFC). This contains LED service indicator lights so service calls are quick and accurate. Also, it easily accommodates hook-ups for a humidifier, HRV, and electronic air cleaner.

Insulated Cabinet
You'll be able to enjoy very little sound disturbance because this furnace has whisper quiet operation. The blower compartment has been acoustically insulated so very little noise can escape. It's also been designed for durability with a powder coated finish that resists scratching and corrosion.

Easy to Install
Installing the Napoleon NSM120S5A furnace couldn't be easier. You have the option to install it as upflow, horizontal right or left, and downflow with no additional installation kit necessary. Also, it doesn't require any clearance so it can easily go in a closet or alcove. There are multiple intake/venting, gas pipe and electrical connection options as well.


  • Model: NSM120S5A
  • Product Type: 120,000 BTU Single Stage Natural Gas Furnace
  • Product Color: White/Red
  • Application: Single stage natural gas furnace ideal for providing reliable, safe and efficient heat for your home
  • Type: Furnace Heater, Single Stage Furnace
  • Warranty: Manufacturer's limited lifetime warranty
  • Fuel Type: Propane, Natural Gas
  • Efficiency (AFUE): 95 %
  • Motor Type: Multi-speed PSC
  • Motor Size: 3/4 HP
  • Input: 120000 BTU/HR
  • Output: 114000 BTU/HR
  • Minimum Vent Size: 3 Inches
  • Maximum Vent Size: 3 Inches
  • Minimum Vent Length: 15 Inches
  • Maximum Vent Length: 100 Inches
  • Blower Size: 12-10TDD
  • Maximum Air Flow: 2000 CFM
  • Minimum Air Flow: 12000 CFM
  • Tonnages: 3, 4, 5
  • Return Opening Size: 14x23


  • An LED service indicator light ensures quick and accurate service calls
  • Comes with a manufacturer's limited lifetime warranty
  • Controlled wrinkle-bend design allows for no heat exchanger weakness because the tubes are a consistent thickness
  • Powder coating resists scratches and corrosion and also eliminates sharp edges
  • Shortest high efficiency furnace on the market with 32 7/8" height
  • Very efficient with a 95% AFUE for savings on your utility bill
Our Guarantee
  • FREE return shipping
  • Hassle-Free return policy
  • Zero restocking fees