Ducting in loft space for bathroom shower

[Ackoman]

Hello,

I've got an Xpelair C4R in my bathroom ceiling, which vents to the outside world via a vented roof tile and some 100mm diameter flexible ducting.

The problem is, the ducting is so flexible that it presses on the flaps on the top side of the fan and prevent them from opening - I am planning on putting in a short length of inflexible ducting such that the flaps are unimpeded, however I was just wondering whether this is standard practice?

Thanks,

Ackoman

P.S. I think what is causing the ducting to press down onto the flaps is the weight of the loft insulation that is pressing against it

 

[KenGMac]

Ackoman, good evening.

If your loft insulation has been increased by a "specialist" loft insulation company then there is a very, very good chance that the flexi-duct will have been shall we call it "hammered"

Very worth having a look at the above scenario that of the duct being deformed by a ham fisted installation??

 

[Nige F]

You can use any amount of rigid ducting - but insulate it ( probably easier than trying to wrap flexi ) or you'll get condensation inside the duct.

 

[dilalio]

Hello,

I've got an Xpelair C4R in my bathroom ceiling, which vents to the outside world via a vented roof tile and some 100mm diameter flexible ducting.

The problem is, the ducting is so flexible that it presses on the flaps on the top side of the fan and prevent them from opening - I am planning on putting in a short length of inflexible ducting such that the flaps are unimpeded, however I was just wondering whether this is standard practice?

Thanks,

Ackoman

P.S. I think what is causing the ducting to press down onto the flaps is the weight of the loft insulation that is pressing against it

Can't have your flaps not opening