Not sure if I should post this here, or in the "Peeves" thread....... but I'll put it here.
So I bought a used propane furnace for the new garage being built at the lake house. $50. 18 year old, 90% American Standard. Small furnace, only 40K BTH/hr. Will do well to heat the 16x10 foot shop in the back of the garage, and could take the chill out of the air in the larger garage space once it is all insulated (24x34 if you include the shop) if not too cold out.
I reached out to a local HVAC outfit for a quote on installation, converting the furnace from Nat Gas to LP (I have the kit already, 2 burner orifice replacements and a gas valve reg spring, $35), install, vent, and pipe to an as yet to be placed propane tank behind the garage.
Days later, I got a quote via e-mail, and it was beyond stupid. I had no plans to use them for the install based on the quote, but asked how long they thought it would take and they replied, "I think I should be able to get it done in 2 days".
Today I finished the install myself. I placed the furnace on a 4x4 framed pedestal that I made, did the Nat Gas to LP conversion using the instructions that came with the kit. Lagged the furnace to the frame, obtained the necessary adapters to pipe the gas valve to a 20lb propane grill tank. Wired in a $21 thermostat from Lowes, and vented the intake and exhaust runs with 2" PVC consistent with ANSI Z223.1/NFPA 54, installed the "top hat" plenum and fired it up. It works perfectly. It took me a total of 6 hours, not including building the pedestal (which I told the HVAC guy that I would do) but did include running the AC circuit to it (which I told the HVAC guy that I would also do).
Plans are to see how the 20lb tanks work out over this winter, I'd guess that I might use the shop space 2-4 times a week for a few hours. Next year, finish insulating the whole of the garage, get the propane company to drop a 100lb tank behind the garage, then hire a licensed gas fitter to do an iron pipe run from the new tank to the furnace, and do the full input and output gas pressure and leak checks, etc. on the furnace This winter, I will just shut off the tank valve when I am not using the furnace. This a detached garage BTW, so doesn't even have to meet residential furnace codes technically, but I will see that it does in the final implementation.
Anyone want to guess wheat the quote from the HVAC company was, to do what I did in 6 hours with about $45 in materials??