Inline extractor - DB level
Discussion
I am replacing an extractor in the bathroom with an inline in the loft with a manrose 100t. The rooms 1.5x2.7m.
Its all plummed in but about 40db when on fast and down to 30db when slow.
Missus says its fine im in the mind it would wind me up when in the bath so wouldnt want to flaf with isolating it when getting in and out.
Weve not used the fan before tbh.
Its a matter of 20cms from the ceiling outlet that wasnt an issue before due to the duct going all the way out.
Will moving this to be further away from the ceiling outlet (over the shower section) make that much difference or am i worrying about this too much and a fans a a fan.
Its all plummed in but about 40db when on fast and down to 30db when slow.
Missus says its fine im in the mind it would wind me up when in the bath so wouldnt want to flaf with isolating it when getting in and out.
Weve not used the fan before tbh.
Its a matter of 20cms from the ceiling outlet that wasnt an issue before due to the duct going all the way out.
Will moving this to be further away from the ceiling outlet (over the shower section) make that much difference or am i worrying about this too much and a fans a a fan.
Is it actually the fan you can hear and not simply airflow?
It’s the same fan as I tend to fit in any properties we buy that don’t have good extractors already and the airflow noise can be noticeable. Never hear the actual fan, but inlines can sometimes be noisy if they’re not properly mounted.
It’s possible that flexible ducting might also generate more noise than smooth solid duct, either through movement or turbulence.
It’s the same fan as I tend to fit in any properties we buy that don’t have good extractors already and the airflow noise can be noticeable. Never hear the actual fan, but inlines can sometimes be noisy if they’re not properly mounted.
It’s possible that flexible ducting might also generate more noise than smooth solid duct, either through movement or turbulence.
LooneyTunes said:
Is it actually the fan you can hear and not simply airflow?
It s the same fan as I tend to fit in any properties we buy that don t have good extractors already and the airflow noise can be noticeable. Never hear the actual fan, but inlines can sometimes be noisy if they re not properly mounted.
It s possible that flexible ducting might also generate more noise than smooth solid duct, either through movement or turbulence.
I've not actually cable tied down the ceiling end yet until confirming it was all ok and working. It s the same fan as I tend to fit in any properties we buy that don t have good extractors already and the airflow noise can be noticeable. Never hear the actual fan, but inlines can sometimes be noisy if they re not properly mounted.
It s possible that flexible ducting might also generate more noise than smooth solid duct, either through movement or turbulence.
I'm going to try (after a cup of tea);
1. Making the existing run a bit longer/further away from the hole
2. Checking the vent in the ceiling is secured/set right and tied down
Photo taken before the wiring was tidied up:
Solid ducting, twin 45deg angles (longer radius than a single 90) slight downward angle towards outlet to avoid condensation running back. Foil insulation isn’t the best but it’s neat and more than most people would do. No extra noise dampening needed, the wood was just spacing to get above the insulation and get the angle to the outlet.
I hate core drilling in loft spaces but figure that if I’ve got to do it then the rest of the job might as well be as neat as I can make it (within reason).
Solid ducting, twin 45deg angles (longer radius than a single 90) slight downward angle towards outlet to avoid condensation running back. Foil insulation isn’t the best but it’s neat and more than most people would do. No extra noise dampening needed, the wood was just spacing to get above the insulation and get the angle to the outlet.
I hate core drilling in loft spaces but figure that if I’ve got to do it then the rest of the job might as well be as neat as I can make it (within reason).
LooneyTunes said:
Is it actually the fan you can hear and not simply airflow?
It s the same fan as I tend to fit in any properties we buy that don t have good extractors already and the airflow noise can be noticeable. Never hear the actual fan, but inlines can sometimes be noisy if they re not properly mounted.
It s possible that flexible ducting might also generate more noise than smooth solid duct, either through movement or turbulence.
I've not actually cable tied down the ceiling end yet until confirming it was all ok and working. It s the same fan as I tend to fit in any properties we buy that don t have good extractors already and the airflow noise can be noticeable. Never hear the actual fan, but inlines can sometimes be noisy if they re not properly mounted.
It s possible that flexible ducting might also generate more noise than smooth solid duct, either through movement or turbulence.
I'm going to try (after a cup of tea);
1. Making the existing run a bit longer/further away from the hole
2. Checking the vent in the ceiling is secured/set right and tied down
I moved it to a light hole I've prepared that must had been 500mm and DB level went down to 30 from 40.
I will need to move the hole and run pipe a few metres to the opposite end.
Condensation concerns me a bit with the pipe I'd bought anyway (Cheap UPVC flexible) so I think I'll get some PVC Pipe in the week when the merchants is open and use this existing PVC flexible for the corner sections.
Can't seem to get long runs of 100mm pipe in the sheds.
I will need to move the hole and run pipe a few metres to the opposite end.
Condensation concerns me a bit with the pipe I'd bought anyway (Cheap UPVC flexible) so I think I'll get some PVC Pipe in the week when the merchants is open and use this existing PVC flexible for the corner sections.
Can't seem to get long runs of 100mm pipe in the sheds.
Ive now moved it about 120cm with a 1m run of pipe not the 2m and its slightly better but im not entirely convinced.
When i close the duct up it goes much quieter so its extraction noise and measures just jnder 30db which on the manrose spec says it should be 24db at 3M.
https://streamable.com/lxcnht
Maybe i am being picky.
Another thing is the room is currently going through first fix so echoey anyway.
When i close the duct up it goes much quieter so its extraction noise and measures just jnder 30db which on the manrose spec says it should be 24db at 3M.
https://streamable.com/lxcnht
Maybe i am being picky.
Another thing is the room is currently going through first fix so echoey anyway.
Edited by fourstardan on Sunday 4th January 16:32
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