Can anyone tell me what this is? It's on the ceiling in a flat, which has a mechanical ventilation system with heat recovery.
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Discuss Any ideas? in the UK Electrical Forum area at ElectriciansForums.net
Just trying to follow some instructions to upload the image, not having a lot of luck!
Can anyone tell me what this is? It's on the ceiling in a flat, which has a mechanical ventilation system with heat recovery.
Reply to Any ideas? in the UK Electrical Forum area at ElectriciansForums.net