Installing a flue for a gas dryer?

Question

I have to install a complete vent system for a gas dryer. It has to go up in the attic and out the roof. It's not possible to go through an exterior wall.

Does the entire section of pipe have to be double wall, or just the part in the ceiling? Does the open side of the double pipe point towards the dryer or towards the roof?

Answer 1

yes doub in ceiling only open end to dryer

Answer 2

Read the manufactures instructions for how many ells and distance you can have for your dryer. Double wall vent pipe is not required per the International Code which is what all states go by with there own amendments. Always the manufacture instructions are what the inspectors go by for new installations. You can vent through a side wall, through the attic to outside, down through the floor and out etc. Most dryers have multiple venting options. The biggest concern with a gas dryer is the required amount of exhaust and combustion air. The requirements have gotten stricter. If your room does not connect to the home with louvered doors at minimum then you will need to add large vents in the room to pull air in from outdoors. This is the reason most new home builders do not install gas dryers any longer. I work for my local Natural Gas co. & it is rare to see a new gas dryer being installed. They do work better by far though which is why they are worth the additional troubles.

Answer 3

Wall Vent For Tumble Dryer

Answer 4

You do not need double wall at all. A gas dryer vent does not get hot enough to require double wall. It is recommended to use metal 4" duct. The overall length of the vent must not exceed the equivalent of 30'. Every 90 degree bend is equivalent to 3' and the hood going to the outside is equivalent to 3'. You should make the vent as short as possible. Instead of two 90 degree bends you may be able to use two 45 degree bends to accomplish the same thing which will save approx 6'.

The crimped end of the venting goes away from the dryer to lessen the chance of a leak and all joints should be duct taped. It only requires the duct tape to be wrapped around the vent once as this will seal the joint and hold it together well and will require less effort to disconnect the vent when cleaning semi annually as recommended.

Answer 5

The exhaust air is no hotter than an electric dryer. The vertical pipe should be smooth wall and no less than 6 inches in diameter. A dryer is not designed to be vented any more than 6 ft. vert. Anything longer effects dry time. It will still work but the longer the rise the longer the dry time. Use foil or flex metal tubing on the back of dryer to the vert.run. The white plastic is flammable. LAUNDRY TECH.

Answer 6

Don't know about your state but Mich. doesn't require double-wall pipe for dryer exhausting. Also, there are no minimum clearances to combustibles. You don't have to go through the roof - once you reach the attic you can go horizontal and terminate through the gable ends. The crimped end on single-wall pipe will point away from the dryer and towards the point of exhausting. You should also check the dryer venting instructions for your particular dryer. Manufacturer instructions normally are considered the ultimate guide.

Answer 7

There is a dryer vent company that does specifically that. Unplug it at the dryer, and stick a leaf blower in it.then re route it out the wall, where it is supposed to go Through the roof ? never heard of that

Answer 8

yes it has to be double wall all the way out. you also have to have a 1 inch clearance around the pipe when penetrating combustibles. the open end goes away from dryer.