Viessmann 200-W Gas Boiler - The most efficient boiler sold in the UK?

Screwdriva

MeteredOut said:

Pardon my skepticism, but he just happened to be filming the conversation?

Who is the person giving the glowing "report"?

Used to skepticism when it comes to claims that go against the herd - this thread is full of it - the service engineer, Jason, is a well respected heating engineer and works at Jar mechanical. Feel free to reach out to ask if any doubts linger - I'm sure he won't mind as he works on several boiler brands outside of the one's he mentioned in the video. 

FreeBear

Due in part to this thread, I fitted a heat meter to my boiler and started logging data for heating, DHW, and gas consumption. Based on the numbers for this year, I've managed to achieve a combined efficiency of 93%.

There is scope to tune the system a little more, but I need a sustained period of cold weather to get some decent readings. This winter has been pretty mild and gas consumption was under 3000kWh for the year.