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2 bedroom bungalow with a Daikin ASHP

RE: 2 bedroom bungalow with a Daikin ASHP

LittleRed · 2021-11-28T23:23:10Z

Hi, just moved into a brand new 2 bedroom bungalow with a Daikin ASHP and am shocked at how expensive it has been costing so far. We have been in a month and today we used £12.50 in a single day and were not even warm. Each room is thermostatically controlled and it is all under floor. We do not know what temperature it is best to turn it all down to overnight or if we need to keep it a set temperature all the time so any advice appreciated. We are with Eon and the tariff is 21p per kw and according to moneysavingexpert this is the cheapest rate we can currently get. We have just retired and on a fixed budget so were not expecting such high fuel bills. So just looking for expertise on how best to use it most efficiently please.

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Air Source Heat Pumps (ASHPs)

Last Post by Derek M 4 years ago

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Derek M

(@derek-m)

Illustrious Member Member

Joined: 5 years ago

Posts: 4425

05/12/2021 3:09 pm

@littlered

You may find that it is a symptom rather than the root cause of your problem, if your ASHP's are sitting in a 'cold well', they will be pulling the cold air coming out, back into the intake, which in turn will make the cold air coming out even colder. This could continue until your ASHP is running at maximum power, the air going through your heat pump gets cold enough to trigger the backup heater, and your electricity meter goes into overdrive.

Has anyone carried out the temperature tests that I suggested?

If you are not prepared to help me locate the cause of your problems, then I am afraid there will not be much more I can do to help.

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LittleRed

(@littlered)

Eminent Member Member

Joined: 4 years ago

Posts: 37

Topic starter 05/12/2021 3:19 pm

@derek-m Thanks, you have been very helpful. I have not taken any temperatures yet as currently have no thermometer but plan to do it this week as we have already queried the position of the pump. My testing of any advice on here is slow because we only moved here 4 weeks ago, and have been told not to touch any settings otherwise we jeopardise the warranty, all neighbours in same position, apart from one who has ignored this and has been experimenting. We are currently all liaising with him - he is an engineer with some experience in the heating field, so he has been the most informed and most pro-active, the rest of us are all new to this type of system and are therefore more reluctant to change settings we have been told not to, particularly as we do not know what we are doing.

👍

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Derek M

(@derek-m)

Illustrious Member Member

Joined: 5 years ago

Posts: 4425

05/12/2021 3:28 pm

@littlered

I am not asking you to change any settings, just for someone to take two temperature measurements.

Maybe you should ask your neighbour to contact me or maybe I should let him guide you.

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Derek M

(@derek-m)

Illustrious Member Member

Joined: 5 years ago

Posts: 4425

05/12/2021 7:40 pm

@littlered

Hi LittleRed,

What I am trying to do is to establish the airflow around your ASHP. If you know someone who uses an electronic cigarette, you could ask them to blow the vapour near the fence in front of the ASHP, and see if any gets drawn into the rear or side of the ASHP. An alternative, though I have never tried it, would be to use a jostick or similar as the smoke source.

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LittleRed

(@littlered)

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Joined: 4 years ago

Posts: 37

Topic starter 05/12/2021 7:51 pm

@derek-m Yes, I understand. Will try and get a test done asap.

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Derek M

(@derek-m)

Illustrious Member Member

Joined: 5 years ago

Posts: 4425

05/12/2021 9:01 pm

@littlered

Hi LittleRed,

Here are a few thoughts that you may wish to consider before your next meeting with the developer.

First of all I would suggest that you contact Daikin customer services, preferably by e-mail, and clarify what you can, and cannot do, within the terms of the warranty agreement, and how long the agreement lasts. You may find that the developer has been 'selective with the truth'.

Get as many affected people to the meeting as possible, so that it is clear that it is not an isolated case.

Ask the developer, who installed the ASHP's and if they are MCS accredited?

Ask for the heat loss calculations, and a full set of manuals for all the equipment, if these were not provided in the handover pack.

As far as I am aware, it is the developers responsibility to provide a 'correctly' operating heating system, not one that works but costs a kings ransom to run.

👍

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LittleRed

(@littlered)

Eminent Member Member

Joined: 4 years ago

Posts: 37

Topic starter 05/12/2021 9:49 pm

@derek-m Thanks, very useful. I have emailed Daikin and the developer with all of the above and a few other questions, as are all the neighbours. It makes no sense, and would not be possible in the long term to stop owners from adjusting settings on their own heating systems, but for the period of the warranty our hands may or may not be tied, so we are checking this out too. Unlike you, who responds almost immediately, neither Daikin or the developer are in any hurry to help right now which is why one neighbour is currently acting as our tester. I am just used to turning the gas central heating system on or off and not having to think about any controls, so this is all very confusing for me.

👍

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Derek M

(@derek-m)

Illustrious Member Member

Joined: 5 years ago

Posts: 4425

05/12/2021 11:30 pm

@littlered

Hi LittleRed,

I agree fully with your sentiments, your heating system should be set up correctly in the first place, and the only thing that you should need to do is adjust the temperature setting. Unfortunately, as it would appear, many of the installers either don't know how to set up an ASHP system correctly, or cannot be bothered to spend the time and effort necessary. It is about time that more customers started complaining to their installers, the regulator, their MP and anyone else who will listen.

Try telling your developer that you will all be sending your electricity bills to him for payment, until he provides you with heating systems that work correctly. That may give him an incentive to get things moving.

👍

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Derek M

(@derek-m)

Illustrious Member Member

Joined: 5 years ago

Posts: 4425