There are a few solutions i can think of that will help prevent this. If this helps please click on "like" T09:10:01+00:00īasically your problem is the cold air from outside going into the duct and the warm air from the loft is causing condensation in the pipe and due to the fall in the duct its running into your fan. The only other potential solution is to fit a condensate trap on the route of the duct at some point? Seems strange that no one has mentioned this before? Whoever installed the ducting/fan orginally has not complied with building regulations as condensation in the duct is a known isuue, hence the need for the outlet to be below the highest point of the ducting. This is the only way to stop condensation running back down the duct line and into the fan. You wrote "The point at which the fan exits the bathroom ceiling is lower than where the duct exits the building, so there has to be a rise on the duct pipe somewhere in order to reach the exit" - in essence that is the problem! the duct needs to have a high point higher than the wall/grille outlet to the fresh air. Hi Helbels, in a roundabout way the answer to your question is within the question! The only thing that's changed in that time is that we've had 2 new extractor fans fitted!Ĭan anyone possibly shed any light on this? I'm beginning to think this is an unsolvable problem!! The thing that's really throwing me about all this is that about 5-6 years ago, we never had any drip problem. But I am concerned that we are still going to have to raise the ducting at some point to reach up to the exit, and therefore we will still get condensation coming back down towards the bathroom. ![]() It's now been suggested that we should consider f removing all the existing plastic ducting in the loft, replacing it with flexible ducting and an in-line fan, so that we can create a rise in the ducting down towards the exit. The point at which the fan exits the bathroom ceiling is lower than where the duct exits the building, so there has to be a rise on the duct pipe somewhere in order to reach the exit - it currently goes up from the fan diagonally about 4 feet before then travelling horizontally alongexiting the building. Every person that comes to look at the problem suggests something different, and I'm now at the point where I feel I'm just throwing good money after bad as nothing's worked. It died within 4 weeks due to the water coming through it.ģ) Investigating the duct pipe up in the loft to ensure it's not blocked.Ĥ) Replacing the grille at the end of the vent on the outside wall (this had fallen off). So far we have tried:ġ) Fitting a new extractor. ![]() The extractor fan in our bathroom (1st floor flat) drips in cold weather.
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