Asked by: Gaston Milon
home and garden outdoor decorating

How are gas fireplaces vented?

Last Updated: 8th January, 2020

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Direct Vent Gas Fireplaces – most are vented to the outdoors horizontally directly through the wall, but they can also be routed vertically through the roof. Fireplace Inserts – most are vented vertically through the roof, via the existing chimney. Electric Fireplaces – no venting is required.

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Simply so, do gas fireplaces need to be vented?

Ventless fireplaces fueled by gas or propane rely on indoor air for combustion, and they exhaust a low level of their combustion gases into the room in which they're located. A chimney or flue isn't necessary. In fact, ventless fireplaces generally are just for aesthetics and supplemental space heating.

are vented gas fireplaces efficient? Vented Gas Fireplace Efficiency Two-pipe models offer efficiency ratings of 70 percent to 85 percent, while single-pipe units offer around 50 percent efficiency, according to the This Old House website. Single-pipe models are also known as "B-vent" gas fireplaces.

Subsequently, one may also ask, how does a vented gas fireplace work?

Direct Vent Gas Fireplace Vent Pipe The outer pipe draws air in from the outside to create combustion for burning the gas while the inner pipe takes waste to the outside. Direct venting is considered a safe system because no air from inside is used in combustion and all wastes flow to the outside.

Which is better vented or ventless gas fireplace?

Vented logs operate more closely to a real wood fire, than do Vent Free. Vented gas logs must be operated with the damper fully open on a wood-burning fireplace, either masonry with a flu and chimney or a prefabricated firebox with vent pipe. Vent Free logs, also burn less gas than do the Vented gas logs.

Related Question Answers

Radi Groisman

Professional

Do ventless gas fireplaces give off carbon monoxide?

As a result, "When they're running correctly, ventless gas fireplaces do a pretty good job," says Bailes. Incomplete combustion creates the dangerous molecular byproduct carbon monoxide (CO)—an odorless gas that causes brain damage and even death at high-enough exposure levels.

Om Bossens

Professional

Should a ventless gas fireplace smell?

In fact, a faint gas smell is an unavoidable consequence of using gas fireplace logs. As the name implies, ventless gas fireplaces don't require an open chimney to operate. Because they burn only small amounts of natural gas or propane, they are safe to operate indoors.

Tabare GraƱana

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Are unvented gas fireplaces safe?

Venting any type of combustion is ideal. As forwarded by the ventless gas appliance industry, though, ventless gas fireplaces can be safely used because they burn a low enough quantity of gas that it will not present a hazard.

Eliberta Tevs

Explainer

How do you know if your gas fireplace is vented?

Turn on the fireplace. If the flames reach above the gas logs and the look like a wood burning fireplace, then the logs must be vented. If the flames are small, an have a blue cast, the fireplace is vent-free.

Mujahid Vilacoba

Explainer

Do gas fireplaces produce carbon monoxide?

Yes, gas fireplaces are one potential cause of carbon monoxide poisoning. While there are many potential sources of such exposure, including certain appliances and devices, motor vehicles and wood stoves, gas fireplaces are a common culprit to be aware of.

Arismendy DaƱobeitia

Explainer

Do gas fireplaces need to be cleaned?

How Often Should Gas Fireplace Chimneys Be Cleaned? Gas fireplace chimneys should be inspected and cleaned annually. There will not be any soot or creosote in the chimney since you are not burning wood, but you may find bird nests that need to be removed.

Yousri Morgalla

Pundit

Can gas fireplaces give you a headache?

Few homeowners are still unaware of the odorless and colorless gas. It can cause all sorts of health problems ranging from mild headaches to death. Even gases other than carbon monoxide can cause respiratory problems if they're present in large enough quantities and/or someone in the home has sensitivity to that gas.

Yiying Muerza

Pundit

Does Lowe's sell gas fireplaces?

Natural gas or liquid propane Fireplaces & Stoves at Lowes.com.

Jaganatha Sadiq

Pundit

Is a gas fireplace worth it?

Is a gas fireplace worth it? Yes! Gas fireplace benefits are incredibly attractive and convenient; especially for a busy family like yours. You'll get instant heat, pinpoint control, terrific safety and other things which a wood burning fireplace simply can't deliver.

Debla Bollo

Pundit

Can gas fireplaces run continuously?

Most fireplace inserts can be run continuously, as long as the glass front is sealed. Most direct vent gas fireplaces can be run continuously, as long as the glass front is sealed. Vent-free: A vent-free gas fireplace is designed to operate similarly to an oven, providing a secondary heat source that is not vented.

Joaozinho Carame

Pundit

How can you tell the difference between vented and unvented gas logs?

Vented gas logs burn like a real wood fire with a yellow flame that produces smoke. They must be burned in a wood burning fireplace with the damper open, so smoke goes up the flue along with most of the heat. Ventless (vent-free) gas logs burn cleanly with a lower flame that does not smoke.

Ciprian Oltrop

Teacher

Will Vented gas logs heat a room?

A vented gas log must be used in a regular fireplace, designed to burn a wood fire. The Gas Log Heater will provide up to 25,000 BTU's of heat into the room and can be used with or without glass doors.

Jessie Dordia

Teacher

Can you vent a gas fireplace from an interior wall?

Heat & Glo offers advanced venting technology that makes it possible to install a gas fireplace almost anywhere within a home. Power venting technology means that fireplaces can be installed on an internal wall in any room, whether you want a fireplace in your bedroom, kitchen, basement, bathroom – or anywhere!

Benno Szymcza

Teacher

Do you need to open a window when using a gas fireplace?

Open a window slightly while the gas logs are burning to let fresh air enter the room. For best air quality, the gas fireplace unit you install should be approved for the size of the room it will be used in.

Suyapa Petisco

Teacher

Can a gas fireplace be vented downward?

Most of the major gas fireplace brands approve many of their units with power vents. It is perfectly acceptable in most situations to vent downwards, use many elbows, and even vent over 100 feet horizontally.

Rusu Bronstein

Reviewer

Do all gas fireplaces have fans?

Your fireplace or stove, whether it's wood or gas, can be operated with or without a fan. The fan then circulates the warm air back into the room. Most fans on fireplaces and stoves use a rheostat to vary the amount of air the fan is moving. Turn the fan up and a higher volume of air is moving through the appliance.

Frederico Manjarres

Reviewer

Do gas fireplaces put out heat?

Direct-vent gas fireplaces are recommended for their efficiency; 70 percent of the heat they generate remains in the house. These units are also effective for zone heating because people absorb the radiant heat from the glass front while the firebox also heats the air in the room.

Ubaldo Quesney

Reviewer

Is it cheaper to run a gas fireplace or the furnace?

Choosing to turn on a gas fireplace or a gas furnace really depends on what you want to accomplish. Usually it is more fuel efficient to have the fireplace on because it doesn't lose any heat traveling through ductwork, but that also means the heat is localized and won't warm the entirety of a large house.

Ema Goenka

Reviewer

Are gas fireplaces expensive to run?

Gas fireplace efficiency includes easy maintenance, so you have no ashes or soot in the chimney with a gas fireplace. Natural gas is a fairly inexpensive form of energy, so a gas fireplace is inexpensive to run. Gas fireplaces cost 17-19 cents an hour to run, or about $60 annually, Electric Fireplaces Direct says.