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Question DetailsAsked on 7/8/2015

how much would it cost to convert a wood burning fire place to gas?

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2 Answers


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Answered 5 years ago by garrettk


One thing to note in the AL article - ventless gas fireplaces are the cheapest - but they are not really "ventless" - they just spew the exhaust gas directly out into the living space rather than outside.

Not a very bright thing to do in my opinion - I think direct venting heaters and fireplaces should be banned like they used to be "in the old days". Puts the combustion moisture, which from a quick google data lookup can be on the order of about 2/3 pounds of water per 100,000 Btu of natural gas or pound of propane burned.

A gas fireplace might run from around 10,000 Btu for a campfire or Napoleon Flame type to as much as 100,000 Btu for a "full-length log fire" - so for every hour of use it will put from a few ounces to as much as 1.5 cups of water vapor into the room - not a significant factor for sporadic short uses, but can cause condensation and mold in a cooler or less ventilated room, and is also acidic so can cause corrosion of metals and fabric and artwork deterioration - especially brass and copper and aluminum items.

It also puts carbon dioxide and carbon monoxide gas into the room, along with a certain small amount of sulfur compound from the odorant - which many people find very offensive in rooms without very good ventilation and frequent air changes.

As the AL article said - can run from quite cheap for a small insert, but rarely less than $1000 unlerss you already have a gas starter in the fireplace and are just doing a small gas log for appearance only - up into the many thousands for larger units, especially if bringing the gas line to it requires damaging walls or ceilings though that can usually be avoided at a slightly higher gasline installation cost by going outdoors with the line, which can avoid a lot of drywall and painting repair cost in the long run.

Answered 5 years ago by LCD

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