Need furnace help - - LP to Natural Gas.

I would like to convert a furnace from LP to natural gas and having trouble finding parts.

Olsen Ultra Max III. Model HBS-90M.

My Google-fu fails me .....

I would contact the manufacturer. When I Googled the unit, it gave performance info for propane and nat gas. I'm not sure if you only have to change a regulator or the entire burner. I know precious little about this subject.

Yeah, me too. Probably why gas scares me.

Try your gas supplier.

Not sure if this applies to you, but on our furnace it was just the jets that needed to be changed. We ordered the kit from the same supplier I got the furnace from.

It's jets and a regulator. The guy I was helping (his house) drilled out the jets to the prescribed natural gas diameter.

Well, if your insurance guy signed off on it, you're good and I'm out.

I was never here .....

Natural gas burns at roughly 1000 BTUs per cubic foot. Propane burns at 1500 per cubic foot. That means that the orifice/jet/nozzle, whatever you want to call it needs to be roughly 2/3 the size for propane compared to nat gas. Remember its cross sectional area of a circle needs to be 2/3, not diameter. Usually the regulator just has a spring loaded orifice that needs to be flipped. Google up the model number on the unit and order the necessary conversion kit. Most units come set for natural and have to be converted to propane with a kit. I always tape the nat "kit" somewhere to the unit in case it needs to be converted back. Instructions should be available on line. Find out which supply house in your area is the vendor for that manufacturer and get the kit or ordering info through them.

While the conversion inside the furnace is simple enough, what is the story with your natural gas supply? Do you have it already run to your house? Is it plumbed and stubbed to the furnace? Otherwise, the cost of doing that (properly, with certifications and such) can get mighty pricy.

914Driver wrote: Yeah, me too. Probably why gas scares me.

You should be far more afraid of propane than natural gas!!!!

A couple of decades ago they started making it harder to convert the equipment over. Too many mistakes. It may be hard to find the parts.

BTW - I think you and I have the same furnace!