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Can I upgrade it without making a bigger hole? < <
You might find something with a higher flow rate due to better blade design etc. Check flow rates on the fans available. I'm guessing that one is 4"/100mm
Will that really make much of a difference? < <
Not sure how much they vary from the one you have.
If I clean out the one I have, will i see a performance increase? < <
Of course, but minimal gains etc. etc.
Is it likely the one I have has adjustable timing and will elongating it actually make a difference? < <
Does it stay on after the light is switched off? if not you are limited to it only working when the light is on or rewiring it with permanent power. There should be recommendations for the length of time it stays on and lengthening that time should help reduce warm moist air in the room.
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It looks like a 4" or 6" fan. Replacements are like for like so just get the same size again
You can get different ones for different things. There's ones with timers or manual pull cords. One with a humidity stat on would be helpful if you get lots of moisture.
Our bathroom is always steaming up so we bought a dehumidifyer
We have some condensation issues in our main bathroom...
Multiple causes:
It's double glazed at least but still...
The fan is small and runs off the light ring (I assume... As it turns on with the lights).
Couple of questions:
This is the one I have:
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