Installing 2nd bathroom fan

[glider26]

Hi,

Not strictly electrics but here goes...

Just bought a house and the family bathroom has a fan (not timed) that spurs off the light, ducts into the loft and out through a hole in the gable end.

Next door, the ensuite bathroom has no ventilation and gets very humid as we use it most.

As the two rooms are adjacent, is there a solution whereby i'd install a fan in the ensuite using the existing hole in the gable end for both outflows? I've drilled 4 inch holes through masonry before and don't fancy doing it again. Does it mean both bathroom would be ventilated when the light was switched on in one of them?

Thanks

 

[holmslaw]

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[sparkwright]

Alternatively, you may be able to pass the duct through the soffit board, if this is an option, rather than break into the original ducting.

 

[holmslaw]

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