Advice on electric regulations

Hello,

Had damp issue in my buy to let and got a system put in wherein they put outlets in the bedrooms and a fan sort of thing that pulls air in the property.

The work seems to have been done fine but they didn't add a switch to turn the system off, they just wired it into a socket in the living room.

The tenant is moaning about the noise of the fan at night.

I need to approach this company to ask them that they should have put in a switch so the system can be turned off if needed. Is there a health and safety or some type of regulation I can claim when I talk to them so they don't can't counter my argument and fix a switch into the system.

Please see pics.

It it had a switch, it would be turned off and never used, making it totally pointless.

They are designed to run continuously.

I agree that they are designed to run continuously but what if the fan goes faulty or the unit. There should be a switch to turn it off. Turning the mains off is not an optimal solution

Screw the tenant!
You're the landlord and that device prevents damp, which incidentally is not the healthiest thing for a tenant.
Usually damp problems appearing randomly are due to tenants not ventilating the property.
I once visited a property which had double glazed windows sealed with packing tape.
The windowsills were rotten and water was dribbling down the glass of every window.
Never seen such condensation and the heating was at full blast.
They had a newborn and the air was painful to breathe.
I told the landlord and he said he'd spoken to them about it.
Their answer: the property is damp, so we sealed the windows to stay warm.
I reported them to the council.

Does this sound familiar?

Looks like it has had an fcu spurred off the socket to supply the device so if you needed to isolate the live to repair it then you would just need to remove the fuse.

You have a tenant issue not a damp issue .