I would do a google search for Williams, Empire and Kozy heaters. I know that all of these companies make vented heaters in about that size (I am not sure if you are talking input or output of 10,000BTU) for natural gas and I would imagine that they have them for LP or can offer an orifice change to convert one from natural gas to propane. I currently am using both a Williams and a Kozy heater that direct vent thru the wall (both have sealed combustion chambers so you need not worry about LP gas or ethylene getting into the greenhouse. If you have a Home Depot nearby, I know that they handle either the Williams or Empire heater. If you are a gambler, you might also try e bay. I bought the Kozy heater from a e bay listing and it was brand new and was about 1/3 the cost of a regular retail store. Another nice thing about these heaters in this BTU range is that they operate off of a thermopile so they need NO electricity to operate.
|