I've done a lot of research on these and just bought one. It won't heat a whole house but will warm a good sized room nicely. Mine is a Sunsor(http://www.sunsorproducts.com-cheaper even through http://www.shopdirect.com). They offer several different styles and mantles.These are some of the smallest ones on the market for tight spaces Their "Oakland" is a particularly nice contemporary look. The flame and logs are realistic looking,particularly with their optional two -extra -log kit. For more realism I added (fireproof) vermiculite and lava rocks on the bottom for ashes & embers. I found that Sunsors fuel has too strong of an odor when burning, so I switched to Alco-brite(http://www.alco-brite.com/products.htm), which has the same sized cans and the least odor of the three fuels I've tried.It's made from grapes and smells a little like grape wine when burning. They also make fireplaces with or without mantles and I got my lava rocks from them too.Jensen Co.(http://www.jensencompany.com) makes fuel & manteled fireplaces too. They're odor factor is somewhere between the others mentioned, with a slightly higher brighter flame than alco-brite. They are the only co. that would send me free sample cans to try.All of these range from $250-1200 per fireplace.There is another brand called LaFlame which are VERY realistic, throw even more heat and more expensive (Firebox alone: $800,with- mantle up to @ $2,000.They will custom build mantles as well. I just discovered another:The Firebox co: http://www.ventless.com/ which sells boxes & mantels. The box is 500$,with mantels to over $2000 which even feature glowing embers!(I'd like to know how!) There is one more that only makes Antique fireplaces called Vestal Fires, but they won't answer my emails.