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Typical bg scare tactics saying parts not available, there's only really 6 main parts to these and trust me most are on the shelf across the country

Not sure how the grant works but the bigger manufacturers all use hot water priority, so as soon as the tank has water used it re heats it straight away. You need to make sure your heating is on all day ie 6am to 10pm at 20c, then set 10pm to 6am at 18c MINIMUM, this will keep the fabric of the...

Why do yours pull on immersion mate, mine don't as its unplugged :wink: can't say I've ever needed to go and plug it in either, we set a hw legionnaire programme for 2 hours once a week at 3am in morning. That's it immersion wise

On the note about high cost in winter you have to ignore that, you have to take a 12month period and then compare with other months, had a customer who was running a 5 bed house at nearly same cost as oil last winter, issue was it was colder than previous year and cost of elec had gone up :roll...

Helllooooooooo :D Ok in Scotland for an mcs install you would be designing a system so the unit runs to at least -5, me personally I'd design it to about -7, if customer had any data on actual average land temps of that area we could adjust the curve accordingly, lets start here What's...

You'll need a meter twice the size of the box containing the current meter :shock: