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Dimplex Quantum heaters

  • January 1, 2024
  • 20 replies
  • 3836 views

Updated on 06/03/25 by Ben_OVO

The Dimplex operating manual can be found here.

I have asked before on this forum and still not had an answer. I have Dimplex Quantum storage heaters which were installed by my local authority after they ripped out gas central heating. Quantum meant to be economical and environmentally beneficial. However, to run just one of them is £25 per week I have 4 in total, but only run one of them. I am over £200 per month. I have two electric panel heaters which are more controllable and cheaper to run. But still over £200 per month for all my electric. I’m on economy 10 which I was told they should run on, but there’s hardly any providers can give this. I’m with OVO, formerly SSE. My next door neighbour still has gas central heating, is on a pre paid meter and is £125 per month for that and electricity. Same size house as mine. She runs her tumble drier umpteen times each week too.

We’ve also got some great Forum topics which you might find useful 👇

 

 

20 replies

Blastoise186
Plan Zero Hero
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  • Plan Zero Hero
  • January 1, 2024

Your question was already answered by a forum visitor. Please check out the thread below to find it.

Trying to directly compare your own bills against that of someone else is unreliable - it’s impossible to get an apples to apples comparison with a sample size of just two.

As the previous thread suggested, there may be other heater types you can use that might be more suitable for your use case.


BPLightlog
Plan Zero Hero
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  • Plan Zero Hero
  • January 1, 2024

Hi @Sleepysusie , I’m not sure if you responded to the last message regarding your current tariff. If you’re not on an economy tariff (E7 or similar), then you will be paying at a higher rate to charge your heaters overnight. 
Edit: just seen your latest comment regarding economy 10. In that case, you will need to make sure that you are being charged accordingly for the times that your heaters are being powered on. If you have a smart meter then this is easier to compare 


  • Carbon Cutter****
  • January 1, 2024

Well l don’t know what to suggest . l only have a valiant boiler and radiators. Put the heat on when needed and feel cold. try not to have it on to much if possible.


Blastoise186
Plan Zero Hero
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  • Plan Zero Hero
  • January 1, 2024

The other problem is that while Dimplex Quantum heaters can be smart, most councils and housing associations cheap out and de-select the optional controller module that gives them their smart functionality. As a result, they don’t have any of the smart/intelligent features that Dimplex intended… And that kinda makes the problem worse.


  • Carbon Cutter****
  • January 2, 2024

I feel for you. I bought a house with storage heaters and they cost a fortune and I never felt warm. Like you I ended up  buying oil filled radiators. When I was buying the next house I refused to even look at houses with storage heaters. I think councils use them as a tick box filler, ticks for green & ticks for cheaper installation not thinking of those who have to live with them


  • Carbon Cutter**
  • January 8, 2024

I feel for you. I bought a house with storage heaters and they cost a fortune and I never felt warm. Like you I ended up  buying oil filled radiators. When I was buying the next house I refused to even look at houses with storage heaters. I think councils use them as a tick box filler, ticks for green & ticks for cheaper installation not thinking of those who have to live with them

Thank you Sally 123, I so appreciate your reply. I’m going to take the council up on this one, 3 years I’ve been asking for their help. They are my Landlords, they have a duty of care to their tenants surely. 


  • Carbon Cutter**
  • January 8, 2024

Which meter do you have? Can you see when it changes from peak to off-peak? What is your daily usage for day and nith time rate? If you check your meter readings, it might help.


I have asked before on this forum and still not had an answer. I have Dimplex Quantum storage heaters which were installed by my local authority after they ripped out gas central heating. Quantum meant to be economical and environmentally beneficial. However, to run just one of them is £25 per week I have 4 in total, but only run one of them. I am over £200 per month. I have two electric panel heaters which are more controllable and cheaper to run. But still over £200 per month for all my electric. I’m on economy 10 which I was told they should run on, but there’s hardly any providers can give this. I’m with OVO, formerly SSE. My next door neighbour still has gas central heating, is on a pre paid meter and is £125 per month for that and electricity. Same size house as mine. She runs her tumble drier umpteen times each week too.

  I have quantum  heating in a local authority one bedroom terraced cottage in Scotland. The bills are astronomical and I am still frozen. Over £340 a month in winter. I don’t cook a lot as I am disabled. All money is for heating and hot water with a great big tank. I have an electric shower so only use hot water for kitchen sink and bathroom sink. The heaters charge up over night and also during the day. A during the day  two or three times a day. I have two meters.  This can’t go on. we had the old heaters that were much better and cheaper. Where I live we have extreme weather. No piped  gas. 


Blastoise186
Plan Zero Hero
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  • Plan Zero Hero
  • May 23, 2024

If you’re on Economy 7, you shouldn’t be charging those heaters during the day.

Just to check, what tariff are you on?


kerr
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  • Carbon Cutter*****
  • April 7, 2025

I had a new smart meter installed today, having previously had 2 meters for cheap rate and normal rate. My question is will my Dimplex Quantum storage heaters charge automatically during my economy 10 cheap rate periods or do they require to be programmed to charge during my cheap rate periods or do they require need to be programmed ?


BPLightlog
Plan Zero Hero
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  • Plan Zero Hero
  • April 7, 2025

Hi ​@kerr , if the wiring to your storage heater has been connected to the meter in the correct way, they will be energised at the off peak times (as long as they are switched on locally.

A 5 terminal smart meter has the extra feed to manage the off peak switching.

It is best to keep a check to make sure.


Ben_OVO
Community Manager
  • Community Manager
  • April 8, 2025

@kerr thanks for your post, and welcome to the OVO Forum 😁.

 

@BPLightlog thanks for your great advice here, and ​@kerr please do let us know if you have any issues with the new heaters, eg if they don’t come on at the correct times. Hopefully it will all work as it should 🤞. You may also find some helpful information in this previous Forum post:

 

Cheers!


kerr
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  • Carbon Cutter*****
  • April 20, 2025

My heaters are charging and heating ok however I’m on Economy 10 but they seem to be charging st the wrong times. Eg. They are due to charge at 13.30 daily and they don’t start charging until 14.30, like wise should stop at 16.30 but don’t stop until 17.30

Ive phoned IVO and emailed with no response !


Nukecad
Plan Zero Hero
  • Plan Zero Hero
  • April 20, 2025

Remeber that we are now on BST, so our house clocks are generally an hour in front of the meter switching times.

Meters work on UCT, Universal Time, and don't usually change for summer time.

If you are looking at half hour readings it can cause some fun with working out which day the midnight hour is being attributed to.

However when you have a dual rate smart meter your bills are usually adjusted to account for summer time.

You just need to be aware that the off-peak can be different summer or winter as we all change our clocks.

 


kerr
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  • Carbon Cutter*****
  • April 20, 2025

I’m in Northern Scotland and was going by the times as shown above on OVO website. I am on Economy 10 but currently appear to be getting the cheaper rate during the periods shown under PAYG on BST. Is this how it should be at the moment ?  I’m totally confused !

 

 

 


Firedog
Plan Zero Hero
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  • Plan Zero Hero
  • April 20, 2025

@kerr  I’m afraid that that article seems to have been compiled before smart meters were invented. You’ll find a more recent list of Economy 10 timings here: Complex Multi-Rate Meter & Heating types | The OVO Forum; Your arrangement is the very last line.

You should find that the actual times when charging starts and stops are in fact a few minutes after the advertised times. It’s a good idea to note just how big the delay is - it will always be the same. Then you can be sure of not switching on something power-hungry before the offpeak tariff rate has taken effect.

 


kerr
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  • Carbon Cutter*****
  • April 21, 2025

Thanks for that, I understand now. From early readings it looks like it’s going to be more expensive than I was on THTC, is this common ?


Firedog
Plan Zero Hero
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  • Plan Zero Hero
  • April 21, 2025

If you’re finding that it’s more expensive now than before, either (a) you’re using electricity which used to be offpeak but isn’t any longer (e.g. running a panel heater at 8 pm), (b) you’re not using electricity when it’s now cheapest to do so, or (c) both of the above. Both peak and offpeak rates are lower for Economy 10 than they are for THTC, so it’s likely that you’re not yet used to not having a 24-hour cheaper heating circuit. 

You must also check carefully that the tariff is changing in the meter when it’s supposed to. We’ve sadly seen several cases where the switched circuit for heating equipment is being energized at the right times but the change from recording on the meter’s peak register to recording on the offpeak one is happening at different times. The two timetables should normally match exactly. If your IHD is working properly, it should show the times when the tariff changes.


kerr
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  • Carbon Cutter*****
  • April 21, 2025

Thanks for all the help, I’ll carry out some checks and try to maximise useage during the cheaper rate. Thanks again, it’s an age thing ! 🤣


Emmanuelle_OVO
Community Manager
  • Community Manager
  • April 22, 2025

Thanks for that, I understand now. From early readings it looks like it’s going to be more expensive than I was on THTC, is this common ?


Hey @kerr

 

I can see Firedog has given some helpful advice here 😊. Just wanted to add the following you may find useful: