Yeah, I had a bunch of houses for awhile. Many of them had hot water heaters and gas furnaces that needed a bit of help at one time or another. Had to figure it out. Certainly can't call a heating contractor and give him $200. for the visit.

My greatest accomplishment was to remove a gas furnace from one of them, prepare a new proper concrete plinth, install a brand new furnace, have the the new ducts made up, and add all wiring, gas lines, and exhaust (PVC) lines.

Total cost for the job, including the furnace, and all parts was $850.00.

A heating contractor would have got $3K for the job, and he would not have done the concrete plinth nor would he have run a new thermostat line.

It took two full weekends to get it all done, but, the satisfaction of throwing the switch and watching three main burners light off was immense.