We have a standard fireplace with a flue - we've never used in 5 years we've
lived in this house - now my girlfriend wants gas logs after our friends got
them - "they look so cozy" - so now I'm looking at the gas log sets - the
vent free sets provide decent heat AND I don't have to worry about
remembering to open and close the flue - the vented sets probably run more
heat up the flue than they provide in the room AND I have to open and close
Pricing looks similar - why not go with the vent-free logs? Thanks!
The vent free are something like 99.5% efficient. There are some people that
think the gas logs will give off too many fumes and burn up all the oxygen,
but that is not the case in my experience. Burning gas does give some
moisture to the air. In most houses, this is not a problem, especially if
you burn the logs for a couple of hours to look pretty. If you had a really
tight house and burned them on high day and night, it may be too much
moisture. They are no worse than using the gas range or the gas oven that
is in millions of homes.
On Fri, 5 Dec 2008 20:37:58 -0600, "Just a citizen . . ."
Any kind of combustion will produce *some* carbon monoxide and other
by-products. How much toxic gas is produced in the living space can
be variable and it may (or may not) be safe. Personally, I would
prefer the vented type.
on 12/6/2008 7:32 AM Phisherman said the following:
I have a vent free propane fireplace in my 20' x 20' Four Seasons
sunroom. I also have a Smoke/CO detector mounted in that room, just like
I have a Smoke/CO detector in my basement where the boiler and water
heater are located, and in the kitchen where the gas range is located.
The one advantage of a vent free gas fireplace is that all the heat
generated is going into the room, rather than having a part of it going
out the flue and having another access for cold air to come into the room.
Ed hit the high and low points already, but i work in the hearth
industry and I am not a fan of vented or vent free gas logs, even
though im pressed to sell both types. The reason most of our customers
have been displeased with them is this...
Vented gas logs require that we disable the damper during installation
(by building code and product instructions) and this is a huge heat
waster as you can imagine. We give the customer an option to have a
chimney balloon installed, but that must be removed when the firepalce
is used. Furthermore, even while you are using them they dont give off
Vent free gas logs are a better option if you want to actually get
heat from the gas logs, but they do effect indoor air quality (no
matter what the manufacturers propoganda says). As Ed said they put
excess moisture in the air and they do out put carbon dioxide and
carbon monoxide. So if you have infants or pregnant women in the home
it is not recommended. Your oven says "dont use as a heating device",
likewise vent free gas logs are not a heating device they just happen
to put out heat. If you have an old leaky house it is not an issue but
if you have a newer efficient home the vent free gas logs are not a
Do a Google search.
You'll find many vent free gas logs and space heaters these days.
Even Rinnai is now selling them.
They have an oxygen depletion sensor and per lab tests, they don't
emit hazardous levels of CO, NOX or even water vapor. The water vapor
they emit is probably beneficial in winter.
Now, I'll admit that if you have a REALLY tight new home, you might
have some problems. Another problem would be putting an oversized vent
free heater in bathrooms and bedrooms. The building codes in my area
prohibit using a vent free heater of over 10,000BTU/hr in bedrooms or
baths.The idea is that there might not be enough make up air for the
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