Most places don't require rigid ductwork. it also appears that 2014 NY code doesn't either. 603.6.1 Air Ducts. Air ducts shall be permitted to be rigid or flexible and shall be constructed of materials that are reinforced and sealed to satisfy the requirements for the use of the air duct system, such as the supply air system, the return or exhaust air system, and the variable volume/pressure ...

2023年11月23日 · I think the ducting is the problem as it's taped to the exit point in the roof, there are peaks and troughs in the ducting, and the ducting is over 1.5m in length. We're in a new build as well, but the developer (obviously) cut some corners. The ducting on the left is the one causing damp in the room below (our en-suite, for context). When we ...

2021年6月28日 · The old extractor had a 100mm duct, so there was a 100mm hole going through the wall. The installer placed a 150 -> 100mm reducer at the top of the hood, and ran 100mm concertina ducting from this to the wall.

2020年12月5日 · I'd like to add a similar piece of ducting to vent the tumble dryer outside, plus I'd like to add another length to add an extractor fan to vent the bathroom. The layout of the flat makes it quite easy to bring all three lengths of ducting to the inside of …

2025年2月1日 · There is a about 0.5m of flexible ducting that connects onto a 90 degree bend and about 3m of straight ducting that then feeds out the house. With the draught-excluder off, front grill off, around the edges of the fan a piece of tissue is being blown out rather than sucked in (in the centre of the fan its sucked in) - so the fan isn't ...

Determine the proper sized fan. Once you've got all the information, it's time to select an appropriately sized fan. To do this, you can use a chart like this. Using this chart, you'll find that for a 640 cu. ft. bathroom and 70 ft. of duct (equivalent length), you'll need a 110 cfm fan to achive the recommended 8 air changes per hour.

2023年1月24日 · The bathroom extractor fan is old and weak, and there is some distance between the bathroom and the outside, which means the bathroom often gets damp: here is a diagram. I would like to replace the extractor fan, however, the current extractor fan is quite difficult to access, with only a small port to the fan in the side of the ducting.

2011年7月30日 · Interestingly, pretty much all the houses I've been into were built with the fan venting into the attic, which does appear to lead to moisture damage up there. All the good repair guys vent those fans straight to the outside with their own dedicated vent right away, and those moisture problems disappear! –

2015年4月30日 · Our bathroom extractor fans are vented into the attic of our ~70yr old house in Philadelphia. According to our home energy auditor this is pretty common here. We want to vent these to the outside before we proceed with insulation which might involve spray foam spray foam bringing the attic into the envelope of the house.

You can replace the fan opening with a grill for each washroom. Then add an 'inline fan' to the remaining leg of the Y adapter and run ducting to vent outside. The above scenario will work provided the following: 1. When inline fan is in operation, air from both washrooms will vent out. 2. Both washrooms must have nearly identical square ...