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Electrical

Bathroom fan stopped working due to humidity

Anonymous user 15/03/2024 - 2.37 PM

Hi. We had an icon airflow fan fitted into our bathroom ceiling about 3 years ago. All was fine until it shorted out and stopped working due to water inside the fan. The ducting went into our loft and out of the side wall. Since then we have built a side extension where the ducting was and there is quite a lot of condensation built up in the bathroom. We are deciding whether to fit a venting brick into the bathroom or replace the fan but not sure where the ducting can go. What advice do people have for the best course of action to reduce the condensation.

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2 Answers

Anonymous user

Loft spaces are generally very cold in winter nower-days as we all have thick (effective) loft insulation. It sounds like you appreciate that if you blow warm moist air through pipes up there then condensation will form. The best solutions, in combination perhaps, are to 1. insulate the ducting(take care not to crush it), 2. Ensure fan has a good length of run-on time to flush all moist air through and fully warm the ducts, 3 fit a trap at and significant lenth of vertical duct, 4. Make ducting runs as short as possible. 5. Fit ducting in such a way as moisture does not run into fan, 6 fit fan in oriantation than electronics are not below the fan duct, ie upside down. 7. Fit a fan with good power to ensure as much flow as possible.
Answered18 February 2018
2

County Electrical

Rating: 5 out of 5
Inverness
Airflow fans are only suitable for installations when the fan is mounted on an external wall. This is because they can only extract using a duct which is not very long, 50cm or so. The longer the ducting, the less air will be extracted. The warm, moist air isn't moving quickly enough. This is why the moisture has turned into droplets. I would always recommend a fan over an air brick. Choose a centrifugal fan which can extract through longer lengths of ducting. Pre-insulated ducting is available if you would like to insulate the duct.
Answered18 February 2018
2