Empire Comfort Systems


Empire 66" GWTH25/35W B-Vent Gravity Wall Furnace

Fuel Type: Natural Gas
BTU: 25000

Estimated Arrival: Between and . (To All Contiguous States)

✔ Same-Day Order Processing
✔ Free Returns
✔ No Restocking Fees
✔ Financing Options Available

Text or call 888-992-1556, start live chat, or email with any questions. Our team is available to serve you 8:00 AM - 11:59 PM ET, 7 days a week.

Empire Millivolt B-Vent Gravity Wall Furnace with Standing Pilot is available in GWT25W (25,000 BTU'S), GWT35W (35,000 BTU'S) and GWT50W(50,000 BTU'S) models.

Vented zone heating systems use room air to support combustion and exhaust their flue products to the outdoors via a single pipe.
Mounts anywhere you have access to an existing flue or where you can install a vent run through the roof. A vented zone heating system makes an excellent replacement for an inefficient oil or wood stove.

Vented zone heating systems may be installed as the primary heating system.

The Gravity Wall Furnace offers total comfort for a fraction of the cost of electric heat. The furnace’s common size retrofits easily. Designed for installation in a standard 2 x 4 stud wall cavity. Optional Out-of-Wall Kit (GWTW2W) allows surface mounting and encloses the sides.

For the smaller GWT25W and GWT35W, an optional Rear Register Kit (GWTR1W) directs heat to an adjoining room.

Our economical Gravity Vented Furnaces utilize state-of-the-art technology for better fuel efficiency. Recesses into a wall or surface mounts with the optional kit.

Thermostat is not included.


  • Dimensions: 16" (W) x 6" (D) x 66.12" (H)
  • GWT25W Weight: 75.00 lbs
  • GWT35W Weight: 81.00 lbs


  • GWT25W BTU's: 25,000
  • GWT35W BTU's: 35,000
  • Fuel Type: Liquid Propane or Natural Gas
  • Type: Gas Wall Furnace
  • Finish: White Powder Coated
  • Vent Type: Top
  • Ignition Type: Match Lit Standing Pilot
  • Wall Type: Single
  • Heater Type: Gravity
  • Built-In Features: Removable Panels for Easy Cleaning
  • State-of-the-Art Technology for Better Fuel Efficiency
  • Thermostat not included
  • Common Size Retrofits Easily
  • GWT25W/35W Furnace Recesses into Wall or Mounts Flush with Optional GWTW2
  • Total Comfort for a Fraction of the Cost of Electric Heat
  • Optional Blower Available
  • Made in USA

CA Residents: See Prop 65 WARNING.

Options & Accessories