The economical Gravity Vented Furnace utilizes State-of-the-Art Technology for the highest possible fuel efficiency. The patented burner design reduces NOx emissions by 50% for cleaner operation. Furnace recesses into wall or mounts flush with optional kit. Heat one room with the GWT-25 or GWT-35 or two rooms with the GWT-50.
Features:
- Gravity wall furnace
- Available in liquid propane and natural gas
- Millivolt
- Total comfort for a fraction of the cost of electric heat
- Optional wall or built-in thermostats require no electricity
- Optional blower available
- Common size retrofits easily
- GWT-25/35 furnace recesses into wall or mounts flush with optional kit
- Available in 50000 BTU, 35000 BTU and 25000 BTU
Dimensions & Weights
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Empire Comfort Systems:

The first and only condensing vented gas fireplace system certified for use in the United States. This super-efficient, ecologically sensible gas fireplace is so unique, it humidifies as it heats. The concealed three-stage heat exchanger captures more than 90 percent of the heat energy from the burner and directs this warm air into your home - not up the flue. With so much of its heat extracted, the exhaust can be vented outdoors in conventional PVC piping - saving money, labor, and space on installation compared to traditional direct-vent systems. The Mantis unit is so versatile it can be installed as a fireplace, insert, or freestanding stove, leaving you many options to have this great product a part of your home.
General Shipping Information:
- Shipping EstimateView
- Stock Status:View
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Ships to:
- Ship Method:FedEx/UPS
- Upgrade Available?
No
- Shipping Restrictions:
None
FedEx/UPS Additional Information:
This item ships with UPS, FedEx, or occasionally USPS.
We don't need you to sign for it, but the driver may choose whether or not to drop off the package at your home. If you know you want your package left at your doorstep, the best bet is to leave a note on your door with your name and the tracking number that reads ‘No Signature Required.’
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