We installed a wall mounted 30,000 propane ventless a few years ago in a cooler part of the house. That area is now the warmest part of the house and we keep the thermostat on low. Clearly a success. I don't know about a 'fireplace' style. Get one with a thermostat, just cause they require less attention. We love ours and wished that we had put it in long before we actually did.