Which Heat Pump recommendation would you pick

swanny65

Hi,

Having had solar panels with a Tesla battery fitted earlier this year I am looking to replace our old gas boiler with a heat pump. We also have a 26 yr pressurized cylinder that is likely to need to be replaced in the future. He also switched from a gas to and electric cooker a couple or month ago. There is only my wife and I living in the property.

Our house has UFH in a floating floor downstairs and hung in the roof joists upstairs. The house was extended 12 years ago and UFH was put in a screed in one room and in a floating floor in the other room - there was a mistake made with this UFH installation which means we dont get enough heat in the room with a floating floor. This is because I believe we have a 22mm supply to the original two manifolds in the property. However when the UFH for the extension was plumbed into the existing UFH the plumber tee'd off the 22mm pipe with a 15mm pipe. As part of the heat pump quotation process I now understand that as a result not enough hot water gets to the UFH in the room with the floating floor and its cold in winter (never above 17c) but it is okay in the screeded floor (gets to 23c okay).

I have had 3 local installers visit and quote.

I also had Octopus visit but I agreed with their representative there was no point quoting as they wont fix the UFH installation mistake and they wanted to rip up our recently refitted kitchen floor, and possibly mess around with a couple of kitchen units, as they insist on a 28mm supply from the heat pump to the hot water cylinder which we dont have, but they other 3 installers are happy with the length of 28 mm supply we do have.

The quotes all after deduction of the £7500 Gov grant:

1. Grant HP R290 12. This installer inpressed me with his tech knowledge. He insists we need an additional radiator for the "cold" extension room. Even after I queried this with him following installer 3 visit.
   Cost £7800 no other costs. 250 Litre HW cylinder
2. Navien PEM750 10kW, Media R290 Thermal Arctic HTSeries v14 or Viessman Vitocal 150-A 13kW. This installer was also great on the plumbing side and had several heat pump options. He initial quoted to fit an additional radiator in the "cold" extension room but agreed after I queried installer 3 opinion this could be left out and done later if needed. His recommendations include a Navien heat pump which is the cheapest option. Whilst he was content to remove the additional radiator from the quotes it is included in the Media install price as I had ruled this heat pump out and asked for other options.
   Cost £4700 (Navian) £7000 (Viessman inc's premium to increase to 7 yr warranty) £5400 Media not other costs. 225 litre HW cylinder.
3. Nibe S2060 R290 10kW. This installer was recommended to me. He took time to explain why the extension room was cold and how it could be fixed, not only by fitting the correct size supply pipe but by also, forgive my poor explanation, fitting an additional pump to "push" the return water back to the heat pump - less return water mixes with the hot flow.
   Cost £7400 plus I have to pay for the EPC. 200 Litre HW cylinder
   
   Installers 1 and 2 sent quotes using Spruce ? and their calcs are almost identical. Installer 3 provided far less information.The warrany on all is 7 yrs except Media at 10 years.

Appreciate this is a long read but wanted to try and set out all the facts. I could make a case for each installer. Does anything stand out as good, wrong etc. Are the quotes reasonable. Most importantly which way would you jump.

Please dont refer me to Heat Geeks as I have contacted them. They are near enough to my location.

I have also set aside money to add a second Tesla battery in prep to move to an Octopus tariff

Thanks very much