Thursday, August 15, 2013

Why can't a wood burning stove in a garage be vented liked a direct-vent fireplace?

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Doctor Sus


I realize direct-vent fireplaces are gas operated but I thought if I constructed an air intake adjacent to the hot chimney and ran it to the stove it would act in a similar manner; however, I was told this can't be done but wasn't given an explanation. Could someone clear this up for me?
Just to clarify, I would have the burner exhausted out the side of the garage AND the air intake would be adjacent to it, like a direct-vent fireplace.



Answer
Well the wood burning stove in a garage theoretically is in a location with other flammable materials and or fuel in your car. Wod stove, sparks, fumes = BOOM.
THat is why code requires electric outlets to be 4 feet off the ground in a garage.
If you will be doing any wood work you have a second problem. Build up of sawdust in the air. A guy was killed with the same set up. Wood dust in the air, opened the wood stove door to reload, dust detonated (yup DETONATED) killing him.
So please ponder the location and other factors before using a wood stove in the garage.

how to convert a wood burning fireplace to a gas fireplace?




Bryan G





Answer
You have two options.

The inexpensive / cosmetic option is to have the gas installer (usually a plumber) run a gas line to your fireplace, and use gas logs, but make no other changes. The gas logs will burn gas plus air from your home (like the wood burning fireplace) and exhaust up the chimney (like your wood burning fireplace). This solution is appropriate for people who do not need to use the fireplace for heat, and want to use the gas logs mostly for how they look - mostly, I suspect, people who live in apartments or in the South.

Up North, the more expensive, but much more energy efficient option is to install a direct vent gas fireplace insert. This is a metal box that slips into your existing masonry fireplace. Two 3 inch diameter flexible pipes run down your chimney and connect to the top of the insert. One of them brings in outside air for combustion, the other takes the exhaust back up the chimney. The front of the box is sealed so you can see the flame, but no household air is burned (and therefore doesn't go up the chimney). Heat is distributed into the house by circulating around the outside of the insert through louvers designed into the insert. Some inserts also use an electric blower to improve room air circulation.

In both cases (logs and inserts), you'll need the gas line run to the fireplace. If you use an insert with a blower, you'll need to run a electric outlet to the fireplace, too. The folks who sell you the insert can advise about permits necessary - in our part of the country the installer does the electric and the gas and no permit is required. Larger cities will have more stringent requirements.




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Title Post: Why can't a wood burning stove in a garage be vented liked a direct-vent fireplace?
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