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Extraction fan in a bathroom

Former Community Member over 5 years ago

I have limited areas my fan can go. It is going to have be wall mount at the other end of my bath/shower head. My consumer unit is 30mA RCD protected.

I have found a fan

MONSOON ZONE 1 SILENCE TIMED EXTRACTOR FAN MON-S100T

it is main powered, I can’t do a 12v as there is No where the transformer can go.

is the monsoon okay to use? It says zone 1?

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0 ebee over 5 years ago

Can`t your 12v transformer go on the wall outside the bathroom a bit below ceiling line to allow venting?
0 ebee over 5 years ago

If it has a 3pole isolator above it then it will provide a venting space?
0 Former Community Member over 5 years ago

I have no where for the transformer to go, it won’t have an 3point isolation point. It will be straight from light fitting and will come off once the light is off. There is no way to get a 3core from switch without destroying the room. It’s a flat roofed , no access from above the room, joists run across meaning a big strip would need to be taking out of ceiling along with a chase down the wall to the switch. So going from the light fitting to the fan is only way without destroying my house. The fan is at opposite side of bath, so about 1m from shower and about 1.5m from bath bowl.
0 Colin Haggett over 5 years ago

Basically yes it’s ok, as it meets the IP for zone 1.
0 Chris Pearson over 5 years ago

701.55 permits the use of ventilation equipment in zone 1 subject to being suitable according to the manufacturer's instructions. From the sound of it, it is in zone 2, or even outside the zones.

Having the fan go on and off in parallel with the light, as opposed to running on for a period, probably contravenes building regulations.
0 geoffsd over 5 years ago

Having the fan go on and off in parallel with the light, as opposed to running on for a period, probably contravenes building regulations.

Building regulations do not go into such minor details.

Do they even require that a fan must be fitted?
0 Chris Pearson over 5 years ago

geoffsd:

Having the fan go on and off in parallel with the light, as opposed to running on for a period, probably contravenes building regulations.

Building regulations do not go into such minor details.

Do they even require that a fan must be fitted?

The Building Regulations state: "Means of ventilation. F1(1). There shall be adequate means of ventilation provided

for people in the building."

10 minutes in a steamy shower, turn off the fan and step out of the room is probably not adequate.
0 geoffsd over 5 years ago

What do you think will happen?
0 AJJewsbury over 5 years ago

geoffsd:

What do you think will happen?

Excessive condensation?

- Andy.
0 old school sparks over 5 years ago

it would depend if the room has a window or not, if it has not , then it would need its own means of isolation as per the building regs

Extraction fan in a bathroom

MONSOON ZONE 1 SILENCE TIMED EXTRACTOR FAN MON-S100T

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