The following are clearances from the gas regulator vent that should be followed: A building air intake system either gravity or power must be 10 feet away from a gas vent; the clothes dryer must vent at least 3 feet away from the gas vent, and an appliance exhaust and any appliance air intake should be a minimum of 3 …

Where should a dryer vent be located?

It’s best to route the dryer vent in a horizontal path to the home’s outside wall. All horizontal runs should pitch 1/4-inch per foot to the outside. This will help to avoid moisture from sitting in the pipe or draining back to the dryer.

How far can a dryer vent be from the dryer?





35 feet

M1502.
The maximum developed length of a clothes dryer exhaust duct shall not exceed 35 feet from the dryer location to the wall or roof termination. The maximum length of the duct shall be reduced 2.5 feet for each 45-degree (0.8 rad) bend, and 5 feet for each 90-degree (1.6 rad) bend.

How far can you vent a dryer horizontally?

Let’s start with what the IRC (International Residential Code) says: the maximum length of a straight run of dryer duct is 35 feet, with a 5 foot deduction in length for each 90º bend and half that for 45º bends, based on using a 4-inch smooth metal vent, with no screws protruding into the air flow (IRC M1502.

Is it OK to vent the dryer under the house?

2: It’s OK to vent a dryer into the crawlspace or attic, rather than all the way outside. DO NOT vent your dryer directly into a crawlspace, basement or attic.

Can you run a dryer vent vertically?





Can You Vent a Dryer Vertically? You can vent a dryer vertically as long as you don’t exceed a distance of 35 feet in length. The preferred way to vent a dryer is downward or laterally but vertically is indeed an option.

How much clearance does a dryer vent need?

3 feet

There should be no visible lint buildup at any connection from dryer to exterior. Duct vents at exterior should be a minimum of 3 feet from any other opening; window, door, other vents, etc.

Does a gas dryer need a special vent?

Gas dryers must always be vented.



When gas dryers are running, the combustion that takes place inside produces carbon monoxide, which must be vented either outdoors or into a suitable HVAC ventilation system. Most electric dryers also require venting to keep from blowing hot, moist air into the home.

How long can a gas dryer vent be?

35 feet

Dryer vents should be as straight as possible and not exceed 35 feet in length. If you need to route your vent around obstacles, you need to reduce the total length by 5 feet for every 90-degree turn and 2.5 feet for every 45-degree turn.

What is the longest distance you can run a dryer vent?



A dryer vent should not exceed 35 feet in length. Furthermore, for every 45 degree turn of a dryer vent you should remove 2.5 feet in total allotted length. For every 90 degree turn, you should remove 5 feet in total allotted length.

What is code for venting a dryer?

The maximum length of a 4-inch (102 mm) diameter exhaust vent shall not exceed 35 feet (7620 mm) from the dryer location to wall or roof termination, and shall terminate with a full opening exhaust hood. A reduction in maximum length of 2.5 feet for each 45-degree bend and 5 feet for each 90-degree bend shall apply.

How do you run a dryer vent long distance?

Booster Fans. Sometimes, especially in multifamily buildings, the duct is so long that it’s just really hard to push that air all the way through, even with a perfect installation and a good wall cap. In that case, you might consider adding a booster fan. It’ll keep the air moving and cut your dryer’s run times.

Can you vent a dryer with PVC pipe?

PVC pipe’s sensitivity to heat is a big reason why it is not recommended for use in dryer vents. The exhaust from a clothes dryer can reach temperatures ranging from 120 degrees to 200 degrees Fahrenheit, which could cause the pipe to soften and fail.

Can I vent gas dryer with PVC?



Currently, PVC, Vinyl, or aluminum foil material is still common in plumbing applications. However, manufacturers do not permit their use for venting a dryer. PVC or Vinyl duct trap can easily melt because of the hot air coming from the dryer.

Can you use flexible duct for dryer vent?

Modern dryer heating elements are very powerful and can ignite the lint accumulated inside the plastic duct and the dryer, starting a house fire. You can use a 4-inch flexible aluminum foil duct that is UL 2158A listed and marked for safe dryer venting.