GAS FIREPLACE FAQS: Conversion Questions

Can I convert my vent-free natural gas product to another fuel?

No. By national code, you cannot convert any vent-free product.

Can I convert my vented propane gas logs to natural, or vice versa?

Yes. You can convert natural to propane and propane to natural, but in most cases, you need to buy a new valve. It is recommended that you contact a professional before attempting.

Piping, Dampers & Flue Questions

How much can I close my fireplace damper with vented gas logs when in use?

You cannot close your damper at all with vented gas logs while they are burning.

How can I seal my damper with vent-free gas logs?

We would recommend that you close the damper as tight as you can and get a Lock-Top damper that seals at the top of the chimney.

With a direct vent insert, do I need to reline the chimney?

No, you do not have to reline to wood burning specifications, but you must use the piping that is recommended by the manufacturer, which fits into the existing chimney.

What are the different kinds of burner pans for vent-free gas logs?

There is sheet metal, black pipe and stainless steel. The advantage of the sheet metal is that it is less expensive. Black pipe is heavier than sheet metal and costs a little more. The disadvantage of both is that they can rust through because they have very little rust protection. Stainless steel costs more, but will not corrode or burn through and it will last a lifetime.

How high above the roof should a chimney extend?

The minimum clearance for wood or b-vent is 3 feet above anything within 10 feet. For direct vent it is 18 inches above anything within 10 feet.

With direct vent or wood burning, what kind of piping do I use?

You must use manufacturer-approved piping.

Can different piping be used if I cant find the original manufacturers?

No. If you use another manufacturer’s piping and it creates a problem in your house; i.e., a fire or smoke damage, no insurance company will cover you. You will also void the warranty and inspectors will not approve it.

If brick is cracked can I burn wood?

If the crack is bigger than the tip of a graphite pencil, we do not recommend that you burn wood.

It is always recommended that you hire a professional when servicing, maintaining, and converting your fireplace.  SJ Johnson is here for you.