Hi,
I have a bathroom (14.7 cubic metres) which also includes a walk in shower. The only internal extractor grill (100mm) is installed above the shower and is currently connected to a cheap inline fan (currently broken) via flexible ducting in the loft. The exhaust of the inline fan (if it actually worked) vents into the loft space.
I have checked that the electrical supply and switched live (independent of the room light) to the fan and this still works so, I plan to do the following.
Thanks in advance,
Matt
I have a bathroom (14.7 cubic metres) which also includes a walk in shower. The only internal extractor grill (100mm) is installed above the shower and is currently connected to a cheap inline fan (currently broken) via flexible ducting in the loft. The exhaust of the inline fan (if it actually worked) vents into the loft space.
I have checked that the electrical supply and switched live (independent of the room light) to the fan and this still works so, I plan to do the following.
- Replace duct work with insulated plastic pipe (assuming it exists);
- Replace the inline fan with one more appropriate for the volume for the room;
- Cut a hole in the gable wall of the loft for the external vent.
- I used the TLC calculator and it says I need to have a fan performance of 295 cubic metres /hour for "In Shower Area", do I need to also account for the bath? Or do I use the small "Bathroom with Shower" at 265 cubic metres /hour!?
- Given that my internal grill is currently 100mm, I guess I'm going to have to get a bigger grill as it seems fans of the performance above, I need larger pipework, or is there a 100mm fan that is also quiet?
- What fans would be recommended for this use case? I was looking at:
- Given that the bath is located in the opposite corner of the room from the shower, would it be beneficial to have another grill above the bath and then have a Y junction in the loft to join with the shower duct before the fan? Could I then also use two 100mm grills before the Y junction and then use 125mm duct into the fan and out through the wall?
- If so, I have read in other posts on this forum that I should keep pipe work vertical before the fan. How would I achieve this if I use a Y junction, especially since the bath grill would be closer to the gable?
Thanks in advance,
Matt