FAQ's About Piping, Dampers and Flues

We have compiled several pages of frequently asked questions about fireplace safety, maintenance and cleaning.

What is the appropriate level to close my damper when using vented gas logs?
You must always leave your damper completely open when vented gas logs are burning.

What is the best way to seal my damper when using vent-free gas logs?
It is best to create the tightest seal possible when using vent-free gas logs. It is also advisable to get a Lock-Top damper that creates a seal at the chimney top.

Will I need to reline my chimney if I install direct vent insert?
When installing a direct vent insert you will need to use the piping that the products manufacturer has recommended. This piping fits into your existing chimney, which will not need to be relined to meet wood burning specifications.

Can you tell me the various types of burner pans for vent-free gas logs?
The three most common types are sheet metal, black pipe and stainless steel. Each material has its own advantages. Cost is the main advantage of sheet metal, as it is the least expensive. You will get a heavier material with black metal, and an increased cost. Both of these materials offer you very little protection against rust, and are likely to eventually rust through. The advantage of stainless steel is that it will never rust, giving you a lifetime of performance. Of course this improved performance will come at a greater cost.

What is the appropriate length for a chimney to extend beyond the roof?
A wood burning or b-vent fireplace will require that the chimney extend 3 feet above anything within 10 feet. The chimney only needs to extend 18 inches above anything within 10 feet for a direct vent.

What kind of piping should I use with a direct vent or wood burning fireplace?
Always use the piping that has been specified by your unit’s manufacturer.

If I am unable to find the piping recommended by the products manufacturer can I use a different type of piping?
The use of piping other than what is recommended can cause you many problems down the line. First, it will void any warranty on the product. Second, it will not be able to be approved by an inspector. Last, if there does happen to be a problem in you home (fire or smoke damage for example) your insurance company will not pay for the damages.

Can I burn wood with cracked brick in my fireplace or chimney?
It is not a good idea to burn wood if you can locate a crack larger than the tip of a graphite pencil.

 

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