We recently bought a property that had is eventually be a new build. I mean that the shell of the house and windows and outside doors have been done, but the interior is yet to be finished. We hired a project manager to help get a builder engaged and guide us through the process. He's recommended a specific company for MVHR and another for underfloor heating.
We then had a disagreement with the project manager and changed to a different company. The MVHR people remained engaged but the new project managers suggested we replace the underfloor heating company and they offered two alternative providers.
The original provider was suggesting the use of a Niebe air source pump and a large 400l cylinder based on calculations for air tightness 4. The other providers advised the use of an Ecocent 25kw pump, a buffer tank and two 300l hot water cylinders, whilst the others suggested 2 x 17 kw Mitsubishi pump with 2 x 300l cylinders.
The new project manager was unhelpful as to which is better of the latter two. As it happened, the one with the Mitsubishi pumps is unlikely to succeed because their installation would mean moving MVHR installation, which we won't do.
So we are now looking at Ecocent pump. From what I read online it seems that they are effective in summer but struggle in the winter without aditional heat supply such as a wood burner. In addition, it seems that there are some corrosion concerns around anodes after 1 year of use and the cost of the annual service is very high (£400).
Has anyone used Ecocent with MVHR for underfloor and water heating? If so, how did you find their performance in the winter, particularly for heating?
Thank you