We built a new house in 2008 and had a Viessmann 200G ground Source Heat Pump system installed, with underfloor heating upstairs and downstairs. We have lived here for just over 6 years and apart from an expensive start, and a few niggles early on, plus some contractor issues, we have been pleased with the system, the house is always warm and comfortable during the winter. I have read that some people experience a high cost for running the system, I don't have the individual cost of the heating system, but our total electricity bill for the house is circa £2200/year. The problem I felt was that, this increase in renewable energy gave rise to new companies/contractors who new a little bit about what they were doing, and continued to learn on Guinea pigs like us. I expected that as they were just starting, they would take more interest in after sales, and monitor the performance of a newly installed system, to improve their knowledge of how best to set them up?
I have been married for 35 years, with two daughters and two grandchildren. I have worked in the oilfield for the last 37 years. Having lived in town for 53 years (my wife 49 years) we moved to the country.
My first quarterly bill was over £1000. The contractor changed some of the wiring in the pump, I can't remember exactly but it was something to do with 'phasing'. Check the internal wiring is correct
Also, upon investigation I found that the E-heating circuits (1&2) had been activated during commissioning to boost/top-up system temperature. I turned these off and, for my system at least, there was no drop in space and water heating efficiency.
It takes a lot of minor tweaks to get the system on optimum efficiency. Even if it's the same pump, for each house it's different and takes time to get the balance right.
Good for a new house with current insulation specification.