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That's interesting thank you. GT 10 is 3.4 GT 11 0.0 So by that would you be able to be sure the ground loops are OK? Or is that just an observation? Not sure if I have a TMV, nor where my U/F pump is.... News from installer is that they now know I am contacting MCS with a view...

For those interested, my HP readings from one pump are: Heat is set at 5. However the heat slope on the step controller is at 6. MENU 3: GT1 - OFF 60.2 NOW 34.5 GT2 -27.2 :shock: Went into service mode to get the following: GT6 Compressor 78.6 timer in menu 6: DHW Peak...

Do you mean supplementary heating is essential in any GSHP installation? On in this case? If it's the latter, I will have the whole system removed and replaced before adding more expense, if they've got it wrong then they are liable in my opinion! we have an area of flat, south facing garden...

Ground loops are straight runs, not coiled. 400m. Getting any other supplementary heating is a no no - this system has cost a fortune to install and now a fortune to run, I'll go to court first!

If there was anyone with the expertise to offer their services, then please let me know as that may prove invaluable. I am Nr Marlborough SN8, perhaps someone would be happy to do it? Obviously there would be a cost involved. Anyway do shout if so, I need to press on gathering data with a...

We're a single detached house, and we have 2 7kw IVT heat pumps. (single phase as we couldn't get 3 phase here) One serving DHW and the other CH & DHW if I recall correctly. Opinion thus far is that the loops are insufficient and so are the pumps.

The issue is definitely climate related in the sense that we a re comfortable as long as it is mild. As soon as we get a cold snap, the rooms in question become very cold. (My son's room is 12 degrees, from 16 degrees last week) How can I find the flow return temps to the ground loops? Whats...

I was worried - my relative in question has 1000m vs my 400m! We have already added another two pumps to try and solve the rad heat problem! I've attached a few pics for interest //www.diynot.com/network/nudgerreturns/albums/14916

pump added to attempt to improve rad temp upstairs

pump added above HW cylinder

Thanks everyone, I think I really need to bring in an independent engineer to go through this in detail and submit a report. If anyone can recommend a way to find anyone in the Wilts region, that would be brillant. Cheers once again.

SNB, thanks very much, I will look into sorting all those points, in the meantime I've found the spec list (I have noticed the incorrect floor size for a start!): I have also seen one to an identically sized property, and that has been specced by the same supplier with a IVT Greenline HC+ 33kW...

Is this done by accessing the HP's? I'm not technical enough to mess with them, all I know is that the heat slope is set to 6, which according to the supplier is as high as should be necessary for rads. But the rooms are too cold so something's not right! U/F areas are toasty - never had a...

Ive been through parameters many times with the supplier - they always insist the HP's are doing their job and that there is a balancing issue. However, the plumber's opinion is that the Rads offer not nearly enough heat fo the rooms. (would the rads only ever run at the same temps as the...

Thank you very much. My relative has built a house of almost identical size and used 1x7kw and 1x14kw heat pumps. I think I should be at LEAST 21kw. During the last few day's dip in temperature, 2 Bedrooms are reading around the 14 degree mark and we can't seem to get them above that. I...

Hi all, any thoughts on the following gratefully received. I'll bulletpoint to keep things short! New build house, obviously well insulated Block and lime render. Completed 15 months ago. 6,100 square feet. 2X 7kw IVT GSHP's Installed. Underfloor heating loops on ground floor, rads...