Bruspark

Some multi-meters will blow (at least a fuse) if you apply voltage to a resistance test. At 12V most good ones will just bleep angrily...

Back to college Watts are a measure of an instant of instantaneous energy/power. For things like heat generation measuring Watt Hours...

Maybe??? https://www.ebay.co.uk/itm/166254250558 https://www.ebay.co.uk/itm/404917648661 Just Googled.. "100mm vent duct blanking plug"

Further tip remember to remove the cover before departing

Thanks guys . . I had wondered about cutting the old duct at the inside wall, then foam filling the remaining ducting IN the wall up to...

flap vent sealed shut and fill the void with insulation / foam other than that, they can get a builder to come and brick it up

I'm wondering what you are all doing when the new tumble drier doesn't have a vent (e.g heat pump type) but the wall behind it still...

I think there are plenty of people in some slightly lighter corners of the trade doing it as well The big problem is we have trade scams...

Seems to me : Some Landlords feel they might need a certificate but if so it's more as an alternative to complete or up to date...

No - but I was being generous as very few cowboys are even borderline safe /competent