Hi, cylinders are outside on an exterior wall with the ground sloping away from the house. Fitted to current standards in terms of distance from drains, windows etc.
I do want to put a detector in the roof space under the boiler where any LPG will pool if there's a leak, but I can't find one where the sensor is on a cable away from the siren - the idea was not to have the siren in the roof where it might be muffled.
Cheers
Richard