Duct and subtract 5 ft.
Can dryer vent go up.
Keeping a clean dryer vent is much easier when you can safely reach the exit.
I generally see problems with drying when the vent is going up through the middle of a 2 story house.
I had an appliance repair guy out to help with some propane connection issues and he said we shouldn t ever vent a dryer up as it makes it a lot more likely to accumulate lint.
The only reason that people vent dryers into water is to contain the lint so it doesn t fly.
Dryer vents should always be vented through the side of the house and not vented through the roof and ideally the exit should be fairly close to the ground.
When a dryer is in operation it s removing moisture and lint and venting it to the outside.
These terminals need to be cleaned on a regular basis to prevent lint buildup.
The blower has to fight the atmospheric weight of a column of air pushing down 14 7 psi at sea level.
For every 90 degree turn and 2 1 2 feet for every 45 degree turn for dryer vent installation.
More dryer vent cleaning information can be found here.
Use no more than 25 ft.
So the dryer has to vent vertically up through the roof.
Great site dealing in all aspects of vent maintenance cleaning and solutions.
Keep exhaust duct as straight and short as possible.
Exhaust systems longer than the manufacturer s recommendations can extend drying times affect appliance operation and may encourage lint build up on pipe lining.
Keep in mind these rules of thumb.
One important way to control condensation is to maintain an upward slope on the vent pipe toward the exhaust opening.
Dryer vent installation can be a bit of a challenge.
This slope allows condensation to drain back toward the dryer and you can.
The laundry is located in the middle of our home in a hall closet.
This causes two problems.
The shorter the distance and fewer the turns the better for dryer vent installation.
The easiest way to vent it was straight up about 6 into the attic then a right turn in the attic 12 out the back of the house.