Asked by: Olatz Kirchschlager
home and garden indoor environmental quality

Does a fireplace need a fresh air vent?

Last Updated: 19th February, 2020

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Fresh Air Vent Needed for Fireplaces
A fireplace consumes vast amounts of air each minute as the fuel burns. It can easily be 250 to 350 cubic feet of air per minute. The fresh air vent in the hearth may be blocked or it may not be able to supply enough air to satisfy the appetite of the fire.

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Besides, what is a fresh air intake vent?

In many homes the fresh air intake is simply an open duct ran from an outside vent into a basement, or any room housing the home's furnace. Fresh air intakes can be in multiple locations throughout your home, especially in newer homes built to modern building codes requiring homes to be much tighter than older homes.

is a fresh air intake necessary? While not absolutely necessary, a properly insulated fresh-air intake duct attached to the return-air ducting for the heating system is a good idea to maintain healthy indoor air quality in your home.

In this manner, should the fireplace vent be open?

The damper should always be fully open before lighting a fire and when the fireplace is in use. Close it when it's not it use. Operating the fireplace with the damper partially closed will not generate more heat. Instead, blocking the passage through the flue will result in smoke entering the home.

How do you install fresh air vents?

However, the circulated warm air could become suffocating hence it is a smart choice to install vents for fresh outside air in your furnace ducts.

  1. Step 1 - Choose a Spot for Intake Hood.
  2. Step 2 - Install the Hood.
  3. Step 3 - Create a Hole in Return Duct.
  4. Step 4 - Install Duct.
  5. Step 5 - Install a Barometric Damper.

Related Question Answers

Sidney Guggenmos

Professional

What is the purpose of a fresh air damper?

The Fresh Air Damper (FAD) is a 24VAC power-open, power-close motorized air damper designed for installation in a fresh air ventilation duct connected to an outdoor air intake hood and a duct fan or the HVAC return plenum, to control the flow of fresh air into the home.

Shawana Lakhani

Professional

How does a fresh air system work?

Adding fresh air to a heating or cooling system accomplishes two primary indoor air quality goals: It pressurizes a building, and increases indoor air quality by diluting polluted or stale indoor air. The air is pulled into the system through a filter, and then a duct connected to the return plenum.

Nemecia Otten

Professional

Does HVAC bring in fresh air?

In short, no. Though in split system air conditioners design, commonly heat pumps, part of your system is located outside your home, it does not take in outside air. Its main operational purpose of cooling the air in your home is not achieved by moving cool air inside, but by moving unwanted heat out.

Jazael Schuckert

Explainer

How many air intakes should a house have?

Having several return vents (ideally one in every room, but even two or three is better than just one) creates consistent air pressure. If you have one return vent, your home is fine. Keep the doors to each room open so air can properly circulate.

Anoir Woyner

Explainer

Does HVAC bring in outside air?

Although part of a split HVAC system is located outdoors, it doesn't use outdoor air to heat and cool the home. Typically, there is a unit that produces cool air and a furnace that produces warm air. The air conditioner unit is often placed outside of the home and contains a condenser coil and a compressor.

Kanchan Orosa

Explainer

Does boiler need ventilation?

Although the boiler cupboard does not require any form of air vents or additional ventilation, the boiler requires oxygen in order to burn the gas correctly. The flue is the pipe that allows the waste gases produced by your boiler to be released from your home.

Xiaoshuang Blodner

Pundit

Does a boiler room need to be vented?

According to the International Fuel Gas Code, Section 304, each boiler room should have two openings, one within 1 ft. of the floor and one within 1 ft. of the ceiling. This is to allow natural ventilation inside the boiler room.

Amarjit Hervy

Pundit

How does a house get fresh air?

How Fresh Air Comes into Your Home. Air comes into buildings and leaves by three different ways: Doors and windows, whenever they are opened. Joints, cracks and openings where parts of the building connect, including floors and walls and around windows and pipes.

Domitila Seldes

Pundit

What's the difference between a damper and a flue?

Every Fireplace has a chimney damper. This is a movable plate that sits above the fireplace before the flue. If you pull the lever toward you, generally that will open most of the dampers. The flue, also known as the chimney lining, is basically a pipe up the middle of the chimney.

Alecia Salud

Pundit

What is the vent under my fireplace?

Bottom Air Vent - The bottom air vent on Old-Style Heatilator Fireplaces are where cool room air is drawn into the fireplace. The air is then routed around the firebox and exits through the top air vent where it returns to the room as heated air.

Lal VillaseƱor

Pundit

When should I close the glass on my fireplace?

Glass doors should be fully open when starting a fire and when the fire is burning strongly. The glass doors should be closed as the fire dies down to minimize the amount of room air going up the fireplace chimney. When burning gas logs in a wood burning fireplace, the glass doors should always be fully open.

Linarejos Altes

Teacher

How do you tell if my gas fireplace is vented?

How to Tell If Your Gas Logs Are Vent-Free
  1. Inspect the logs. All vent-free logs are firmly attached to a U-shaped burner and cannot be moved.
  2. Follow the gas line from beneath the logs to where it disappears in the wall or floor. If the gas is merely contained by a simple gas line, then the logs are vent free.
  3. Turn on the fireplace.

Taunya Boyle

Teacher

Which way is a flue open?

If the handle is in the closed position, your flue damper should be closed. If the lever is in the open position, your flue damper should be open. Most damper controls are of the pull chain variety. In this case, the chain is in the lower position when the flue is closed and in the upper position when the flue is open.

Nancee Benkens

Teacher

How do you know if your fireplace vent is open or closed?

Perform a visual check.
Using a flashlight, poke your head inside the fireplace to look up into the chimney. If you have a throat damper, you can tell if it is closed if you see a barrier above your head. If you can see up into the flue, the damper is open.

Branko Mcdougall

Teacher

How do you vent a fireplace?

Venting Explained
  1. 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.
  2. Wood Fireplaces and Stoves – venting must be terminated to the outdoors vertically.

Salifu Eddahbi

Reviewer

When should I close the damper on my fireplace?

Close Fireplace Damper When Fire Is Completely Out.
If necessary to keep the fire burning well and smoke-free, you may adjust the damper into a semi-open position. Shut the damper when the fire is completely, absolutely out. That means ashes are cool to the touch even when stirred.

Ampar Dos Reis

Reviewer

Why does HVAC need fresh air?

Sufficient fresh air to a heating or cooling system accomplishes two primary objectives; it pressurises a building and increases indoor air quality by diluting polluted or stale indoor air. The air mixes with the return air and then is dispersed evenly throughout the building through the supply duct system.

Nayara Wandmacher

Reviewer

What is the minimum requirement for fresh air?

Mechanical systems must be capable of reducing outdoor air to minimum required. - Demand control ventilation (DCV) required for spaces larger than 500 ft2 and with occupant load of 40 people per 1000 ft2 of floor area.

Yraya Allemand

Supporter

What is the difference between supply and return air?

The biggest difference between supply and return vents is the direction in which the air flows. In a supply vent, the air flows out of the ductwork. In a return vent, the air flows into the ductwork. A second difference is the size of the vents.