Specification History
| SWS Version | Created | Specification ID | Title | Specification | Objective | Supporting Materials | Rationale | Status |
|---|---|---|---|---|---|---|---|---|
| Version 2025 | 09/24/2023 - 17:13 | 6.0202.1b | Venting installation | Vent all clothes dryers to the outdoors, which does not include unconditioned spaces such as attics and crawl spaces that are ventilated with the outdoors Choose the shortest practical installation path Install a dryer exhaust duct power ventilator that is listed and labeled to UL 705 for dryer ducts exceeding 35' in equivalent length Install ducts according to SWS detail for "Ventilation Ducts" |
Dryer ducted to outdoors durably and effectively |
Interestingly, the IRC has switched the terminology here in the 2021 version (IRC M1502.4.5). They forbid "domestic booster fans", but allow for "domestic exhaust duct power ventilators" that meet UL 705. They also prescriptively limit the length of dryer duct to a maximum of 35 feet TOTAL length though they allow the dryer manufacturer's instructions to supersede this direction which opens the door for the "power ventilators" and longer duct runs. Therefore, we have removed the booster fan requirement and limited the duct length to 35' equivalent maximum. | Red Line | |
| Version 2020 | 08/14/2020 - 14:27 | 6.0202.1b | Venting installation | Vent all clothes dryers to the outdoors, which does not include unconditioned spaces such as attics and crawl spaces that are ventilated with the outdoors Choose the shortest practical installation path Install a dryer booster fan that is listed and labeled to UL 705 for dryer ducts exceeding 35' in equivalent length Install ducts according to SWS detail for "Ventilation Ducts" |
Dryer ducted to outdoors durably and effectively |
Black Line | ||
| Version 2020 | 08/14/2020 - 14:27 | 6.0202.1b | Venting installation | Vent all clothes dryers to the outdoors, which does not include unconditioned spaces such as attics and crawl spaces that are ventilated with the outdoors Choose the shortest practical installation path Install a dryer booster fan that is listed and labeled to UL 705 for dryer ducts exceeding 35' in equivalent length Install ducts according to SWS detail for "Ventilation Ducts" |
Dryer ducted to outdoors durably and effectively |
Black Line |