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Heat pumps

A place to get help with air source and ground source heat pumps, sharing experiences with other MoneySavers.

Heat Pump - KwZ usage through the roof
Hi, We moved to a newbuild in March 2021 with gas and electric provided by heat pump. Each year, we are using around 17,000 kWh, according to British Gas, and spending more than £5,500 in the process. We are a family of two (and a dog) and it's an average-sized 4-bed house. The heat pump installer insists that there is no…
Very confused about Air Source Heat Pump
Hello,My Mother has qualified for a grant to have Air Source Heat Pump installed with new radiators and solar panels with battery backup. Unfortunately, due to having existing passive solar water heating panels, the installer says they cannot install the pv solar panels, but can do the Air Source Heat Pump. On the leaflet…
Mitsubishi Ecodan. Hot water but not heating. Help!
So, room temp is 19C, I have put the desired temp at 24c. Flow temp I have turned up to 50 to see if that will kick start the heating. No luck. Water is on timer and when forced play, the fan works and water is heated. On the main control panel the heating is showing as restricted and paused, however, when you go into the…
ASHP - Flow Temperature Result
I ran my underflow heating for the first time yesterday. I have attached a small temperature probe which is connected to the flow side of the heat pump as it enter the storage unit. Below is the result. The first peak is for DHW and the second is the flow temperature for the UFH. The system ran for 8 hours and was…
Annoying issue with Daikin Altherma 3M Disinfection
Hi, I am hoping you may be able to assist in finding a solution to an issue I have been having with my heat pump (Daikin Altherma 3M) disinfection that runs once per week. My setup: I have the heat pump, solar panels (not relevant), and battery (partially relevant). The issue: The issue is that the disinfection starts as…
Old boiler beeping - what does it mean?
I have an old Ideal WLX CF40 boiler. It probably should have been replaced years ago but following ill health and redundancy I have not managed to do it. But it has always been reliable. Now there is a chirping sound coming from the boiler and I have no idea what it means. Can anyone tell me what this means? Is it safe to…
Danfoss tp5000 thermostat
Hi, I have an older model Daikin ASHP, fitted with what I believe is a Danfoss tp5000 room thermostat. I believe that the temperature sensor in the thermostat is not working accurately.It always seems to think it's around 17 degrees when it's a lot colder. I was advised to keep the desired temperature to 18 degrees, all…
Heatmiser UH1-W, UFH Actuator and Manifold Pump
Hey guys, have an issue. Noticed rooms are cooler than should be. Checked the Heatmiser UH1-W and although the lights are on for room circuits and pump, there are no actuators energised. These are Emmeti actuators which are closed normal state. There are 7 circuits on the ground floor, all run by wireless (not wifi) room…
ASHP - Underfloor Heating - Warm Up Time
ASHP with underfloor heating. How long does it take to warm up (i) in autumn 1st year switch on (ii) following a overnight setback (iii) an increase in temperature demand of say a degree C? I know every property is different, but just looking for some general data. Updated. The floor is screeded.
IVT HT Plus E7 - what happens next?
back in 2009, I ordered a GSHP for a New Build House. I ordered from Ice Energy who spec'd 6kw HT+ E6. My new build house is 160m2 over 2 floors, ufh on both floors. I told them I wanted to extend in the future so they up'd the spec to 7kw. I dug 2 x 50m trenches for 200m of pipe in each trench as per their plans -…
3 Port Valve
so I have a problem with pressure increase on the heating side (underfloor heating) of an IVT HT+ E7. Every time the domestic water is heating, the pressure climbs on the under-floor heating side. I telephoned ALTO who told me my expansion vessel must be bad. I wasn't entirely convinced, thinking it must be the 3 Port…
ASHP - Maximising Efficiency
This will be my first season with a ASHP so looking for some advice on the best way to get the most efficiency out of the system. The property is a 200sq m bungalow, with a large south facing family room with a large bi-folds (lots of solar gain). There are 4 bedrooms, 2 bathrooms. All rooms have their own heatmiser…
GSHP and UFH maintenance interval
Hi folks. I wonder if I could ask for your experience and recommendations. We have a GSHP with vertical boreholes and UFH throughout the house. The installer is recommending a yearly annual service. Having had it done once, it seems to me to be checking filters and concentrations, topping up levels and the like. Given how…
Octopus refund.
I had a survey from Octopus for a heat pump. Even though we have a rural semi, the surveyor said there wasn't anywhere suitable to put the pump. He said my £500 deposit would be refunded within 14 days. The survey was 14 August and I hadn't heard anything from Octopus about the refund since then. I phoned them up this…
Zoned Areas in Open Plan House..any point?
Good evening. I have seen a property which internally has rooms but no doors as such , you can literally see from room to room and through to the staircase. The person selling says it has ‘zoned’ heating control. It may be my age , but not sure how the heating is contained in a zone if its all open plan(ish). Surely the…
Air-to-water heat pump woes
Hello, I just wanted to share my experience living in a flat with an air-to-water heat pump and ask your thoughts. Since I moved into this flat, my energy bill has been high (it's a newly built one-bedroom flat - loft (EPC C), I live by myself and am not frivolous with the energy I use). Does anyone (perhaps an engineer)…
EDF Heat Pump tariff
I recently signed up to EDF 1 year fixed tariff, August 25, that was 26.36 day, 10.52 night and 64.57 standing. I have an all electric bungalow with air to air HSP and plenty of other energy saving technologies. EDF offered a 10p a kw cheaper tariff for heat pumps and enquired, but the first response was 'thanks for…
Just moved - help with new boiler!
I've just moved to a new flat on rent. And got charged a whopping £140 for electricity this month. Our boiler is an Oso 20 RD and has 2 switches - One on the thermostat and one on the wall. What are these switches and what's the best way to use them to still get hot water to shower only?
ASHP - heating issue - Aquarea
Hello I’m trying to help someone with their newly installed air source heat pump. I have absolutely no idea about them or how they work but I’m reasonably good at working things out. The problem is we want to test the heating before it gets cold but turning up the thermostat and boosting the heating doesn’t engage the ch…
Heat pumps with extra batteries
Hi all Been debating for a few years now on whether or not to get an ASHP. We had octopus out but they couldn’t make it work. I then tried other suppliers/installers, but their quotes stood out as significantly higher than octopus. Anyway, I’m still keen to make it work, especially as our gas boiler is approaching 17 years…

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Heat pumps

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