WHO MADE THIS FURNACE!

WHO MADE THIS FURNACE!

I've got the kind of problem I just know can be answered here. A customer of mine recently bought a used mobile home to replace an aging one, and it came with a non-original, gas-fired, counterflow furnace that I cannot identify. I am looking to convert the unit from natural gas to propane and I want to access the manufacturer's info on how to do that properly. I am hoping someone on this forum can give me the manufacturer's name by recognizing the model # and/or serial #. There is a big, stick-on label in the burner vestibule that gives just about every spec you could ask for, but does not give the maker's name. So, here goes. It is Model #FG9B06012DH11D and Serial #WLKMO11845. Nobody at the 3 local supply houses where I do business can seem to find out who made this darn thing, and I am not willing to just convert the burner orifices and take a chance that there is nothing else that needs to be done. It is a powered-vent, 3 burner, 60,000 BTU furnace with electronic ignition. It seems to be relatively new, I would guess less than 10 years old. So, whattayathink? Anybody know who made this thing?

Parts List

Here is the parts list for model FG9B06012DH11D
Hamilton Home Products 1 (800) 879-0123

http://www.hamiltonhomeproducts.com/resource-files/manuals/furnaces/90_furnaces/1-Stage/FG9-G9T/FG9-G9T-DN-Parts.pdf

Propane conversion kit is on page 7 part number 1NP0347.

Definitely- York, Coleman, Luxaire unit, they called them Winchester's too