Vent-free gas fireplace · ProCom

ProCom FS100T-3AS Dual-Fuel Vent-Free Gas Fireplace

Vent-free gas fireplace, up to 500 sq ft, 10,000 BTU/h

Heats up to (maker)
500 sq ft
Heat output (maker)
10,000 BTU/h
Efficiency (maker)
99.9%
Fuel
dual fuel
Venting
ventless
Thermostat
thermostat
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In short

Pick it for supplemental heat for one room.

Wins
10,000 BTU/h.
Gives ground
Adds moisture to the room.
Suits
Supplemental heat for one room.

Updated October 2026

What you get

The ProCom FS100T-3AS Dual-Fuel Vent-Free Gas Fireplace is a vent-free gas fireplace that its maker rates at 10,000 BTU per hour and says heats up to 500 square feet.

Treat the 500 square feet as the maker's best case for an open, reasonably insulated space, and check it against your room before choosing.

At full fire it burns about 10 cubic feet of natural gas or about 0.11 gallons of propane an hour (its 10,000 BTU/h divided by EIA's heat content for each fuel).

As a vent-free unit it burns room air and releases its exhaust and moisture into the room, so nearly all its heat stays indoors. Its manual sets a minimum room size for its BTU rating, and some local codes restrict vent-free appliances. Vent-free vs direct-vent.

Fuel, per the listing: dual fuel. Never connect a gas heater to a fuel it isn't set for.

Ignition: Piezo ignition.

Also on the listing: overall dimensions of 12.5 in (D) x 28 in (W) x 36.5 in (H), a shipping or unit weight of 42 lb and ceramic construction.

Warranty, per the listing: 1 year limited warranty.

The figures, from the maker

Each figure is the maker's or the listing's own, with its source marked. A figure the maker doesn't give is shown as not stated.

Model numberFS100T-3ASRetailer
PowerGas PoweredRetailer
Dimensions (seller)12.5"D x 28"W x 36.5"HRetailer
MaterialCeramicRetailer
Mounting / installationBuilt InRetailer
Heat output (maker)10,000 BTU/hRetailer
Features (seller)Adjustable ThermostatRetailer
Batteries1 AAA batteries required.Retailer
Model nameDual FuelRetailer
Warranty1 year limited warranty.Retailer
Product weight42 lbRetailer
Heats up to (maker)500 sq ftRetailer
Efficiency (maker)99.9%Retailer
VentingventlessRetailer
Fueldual fuelRetailer
ThermostatthermostatRetailer
IgnitionPiezo ignitionRetailer

Is it the right heater for the room?

Pick it when

  • Supplemental heat for one room
  • Homes with gas or propane
  • Heat without electricity

Pass on it when

  • Bedrooms and small rooms the manual excludes
  • Places where local code bans vent-free heaters

Where it wins, where it gives ground

Wins

  • 10,000 BTU/h
  • No chimney needed
  • dual fuel
  • Works in a power cut

Gives ground

  • Adds moisture to the room
  • Restricted by some local codes
  • Needs a gas line

Know before you install

  • Figures are the maker's own and are rated in the maker's conditions. Installation, venting, chimney, gas and electrical work follow the manual and local code, carried out by a qualified installer.

Heaters to weigh against it

Other gas stoves, fireplaces and inserts in the same heat range

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Buying this model

The button opens this exact model's listing. Prices and stock change, and installation parts are usually sold separately; check the box contents and the manual's venting list before you order.

Prices change often; the button shows today's price.

Each button opens this exact model. We may earn a commission on tracked links; it never changes what we publish. Disclosure

Questions about this model

How much gas does the ProCom FS100T-3AS Dual-Fuel Vent-Free Gas Fireplace use?
At full fire, about 10 cubic feet of natural gas or about 0.11 gallons of propane an hour, from its 10,000 BTU/h rating and EIA's heat contents; lower settings use less.
Does the ProCom FS100T-3AS Dual-Fuel Vent-Free Gas Fireplace need a vent or chimney?
No: it's vent-free. Its manual sets the minimum room size and other limits, and some local codes restrict vent-free heaters.

Bottom line

Pick it for supplemental heat for one room.