Another satisfied Heatweb customer here. We've had one of their heat banks for about 5 years now and it's very good. Mains pressure hot water all the time, fills a bath in very short order and gives you really good showers without a high pressure cylinder sitting there with its maintenance requirements. We got one with all the solar gubbins inside but haven't got panels on the roof yet.
I'd like to say the same about the boiler I chose to go with it, but it's currently not working. I got a MAN Heiztechnik one ( www.mhg.de/ ) and it's not been brilliant - a couple of breakdowns since installation and it was not cheap. To be honest I don't think I've had a typical experience in that when it arrived the cover was dented and I asked the supplier to take it back. They said they hadn't got a replacement in stock so it would be about 4 weeks for a new one, we were in the last stages of a long building project and to hold things up for that long would have been a nightmare so I allowed myself to be talked into fitting the original one. I got them to extend the guarantee to 4 years but I've never really been convinced by it and I'm not sure that it's ever really worked to its full potential even though one of the suppliers own technicians came to commission it.
I'm interested that your heating circuit seems to be connected to the heat bank. I don't think ours is.
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