We came across this old heater at our inspection today. We’re trying to find some info about it. It’s in Manatee county Florida. No fan or thermostat. It’a made by Pioneer Furnace Company. I can’t find anything about them except a lawsuit against them for carbon monoxide illnesses. It’s gas with no fan and it is vented. The house was built in 1958 or 1959. Here’s a pic.