Vent-Free Gas Heaters and Fireplaces
Unvented (ventfree) gas heaters and fireplaces are 1) much cheaper to buy, 2) much easier to install, and 3) cheaper to operate (99.9% efficiency!). They are legal in most states (check your local codes before ordering). Not legal in California.
Ventfree Heaters from Kozy-World, Procom and Mr. Heater - All Sizes
From this page, you can select to view ALL ventfree heaters, or you can select by size, gas type (Natural gas, Propane or Dual Fuel), thermostat/manual, Blueflame/Infrared, and whether they come with a blower or not.
Vent-Free Fireplaces
Vent-Free Fireplaces from Procom, Kozy World.
Vented Heaters and Furnaces
From Eskabe and Williams Comfort Systems