If your furnace is 40 years old and in a basement, it may run without
electric. Open the filter door and see if there are emergency instructions.
I assumed it's forced hot air?

Al

yeahforced air but no way to do this safely with this model, valves
cant be opened manually and a good friend says it would crack the heat
exchanger. besides were talking of getting a new furnace since we
recently paid off the home.

i am mst curious about the garden hose heater or me its a brand new idea