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Dimplex Quantum night storage heaters

Dimplex Quantum storage heaters work in the same manner as standard night storage heaters, by charging up overnight using the cheaper rate of electricity on an Economy 7 tariff.

But unlike older models of night storage heaters, Quantum heaters have thermostats and a digital programmer, meaning that operating them is much more ‘hands-free’.

Once you have chosen the room temperature and times of day when the heater is active it automatically works out how much to charge overnight. A fan helps to draw air through the heater and warm up the room when the thermostat senses that the temperature has dropped.

Quantum heaters are better insulated than older models, meaning that less heat escapes when it isn’t needed. They also respond to seasonal temperature changes and ‘learn’ how much heat to store to warm the room to the desired temperature. The running costs of quantum heaters are around 27% lower  than standard night storage heaters due to these improvements. 

Getting started

Firstly, make sure that both switches on the wall are turned on and ensure they are left on all the time, including overnight. This will not mean the heater keeps heating 24 hours a day, it will just keep the low powered programmer active. You can turn off the wall switches in the summer, but it’s best to avoid turning the heater off and on at the wall during the colder months as as this can hinder the intelligent charging function.

The controls are on the top right of the heater under a flap. There is a selector dial which can be rotated and pressed (1), a display screen (5) and three buttons: menu (2), back (3) and advance (4).

Press down the dial and the display screen shows you the thermostat target temperature and timer mode.

Turn on the child lock by pressing and holding both back and the dial for five seconds. Do the same to unlock. You can also set a four digit PIN code lock by going into the settings menu.

When the heater is active, “Heating on” shows at the bottom of the screen. “Heating off” shows that the heater is not currently providing heat, as set by the programmer.

Step 1: Set the time

Your Quantum heater may already have the correct time set, but you may want to double check:

Press menu; rotate and then press the dial when “Date/Time” is highlighted; rotate the dial to the correct day, and press the dial to select. Repeat this process for the date, month, year and time. (On the latest Quantum models, the time is automatically adjusted in Spring and Autumn when the clocks change.)

Step 2: Set the temperature

Rotating the dial changes the target temperature. Rotating left lowers the temperature, rotating right raises it. When the room reaches the temperature set, the heater will turn off. The recommended temperature range is 18-21°C. If you change the temperature during the day, remember to set it back to your preferred temperature before midnight so the heater knows how much heat to store overnight.

Step 3: Set the timer mode

There are four timer modes which decide when the heater will be active (“Heating on”):

1) User timer: Select your desired timeframes (four periods)

2) Out all day: 7.5 hours heating per day in two periods (morning and evening)

3) Home All Day: 13 hours of heating per day, for people who need heat throughout the day.

4) Away: Allows you to reduce the heating while you are away. Set the number of days you are away from home and the desired temperature for this period.

To choose a timer mode, press menu and rotate the dial to highlight ‘Modes’ and press the dial to select. You can then select ‘Timer Mode’ or ‘Frost Protect’. Choosing ‘Frost Protect’ will maintain a room temperature of 7°C. Select ‘Timer Mode’ by rotating and pressing the dial and a list of Timer Modes will be shown. Their default settings are shown in the table below (the factory setting on your heater may vary from the example shown): 

 Period 1Period 2Period 3Period 4
User timer06.30-09.3011.00-13.0015.00-17.0018.00-22.00
Home all day08.00-21.0000.00-00.0000.00-00.0000.00-00.00
Out all day06.00-08.3017.00-22.0000.00-00.0000.00-00.00

You can then choose to ‘Select’, ‘Preview’ or ‘Modify’ the timer mode. Pressing ‘Select’ will choose this timer option. You can view the times currently set with ‘Preview’ without risking accidental changes. If the pre-set time periods don’t suit you, ‘Modify’ allows you to customise them.

Advance button

If the heater is in “Heating off” mode but you need heat earlier, pressing advance will turn the heater to “Heating on”, bringing forward the start of the next time period. This will use heat already stored in the heater and so can leave less stored heat available for later in the day, so use this setting sparingly. Pressing advance when “Heating on” is showing will turn the heater off until the next heating period. Advance can be useful if you are in and out of home at different times to those set on the timer.


The “Boost” option (found by pressing menu) switches on a booster heating element which uses the expensive rate of electricity, and should be avoided except for emergencies (e.g. unusually cold weather). You can choose the target temperature and the duration of the boost (in minutes). Once the boost has run for the selected time it will automatically switch off.

Two further things to remember ...

Leave a gap of 30cm in front of your heater to prevent a fire hazard.

The latest model of Dimplex Quantum can be controlled remotely via the Dimplex Control app.

Sometimes watching a video is the best way to learn about using Quantum heaters.

There are some excellent short guides in this Dimplex playlist.

And here are instructions for using the Dimplex Quantum:

And if you want the full operating manual, you can download it or read it online here.

Frequently asked questions

Are electric storage heaters as cost effective as gas central heating?

Generally electric storage heaters are more expensive to run than gas central heating. However to keep costs down homeowners with electric storage heaters should ensure they are on Economy 7 or Economy 10 tariffs to take advantage of lower, off-peak electricity prices at night.

Need more help?

We can advise you about saving energy, or help you understand what grants and support you're eligible for:

Contact us Or freephone: 0800 082 2234

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Who should I contact to get my electric storage heaters serviced?

A qualified electrician would be able to service electric storage heaters.

Need more help?

We can advise you about saving energy, or help you understand what grants and support you're eligible for:

Contact us Or freephone: 0800 082 2234

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How do I switch to an Economy 7 tariff?

The Economy 7 tariff is only usually recommended for people who use night storage heaters as their main form of heating. You'll need to have an Economy 7 meter installed so that your electricity use can be recorded at both 'day' and 'night' rates. You supplier may charge you for fitting a new meter. If you are switching tariff it's best to shop around to get the best deal. There are a number of independent online or freephone services that can help you.

Need more help?

We can advise you about saving energy, or help you understand what grants and support you're eligible for:

Contact us Or freephone: 0800 082 2234

Next question

View all frequently asked questions

Download the PDF

Download this PDF document

This information is available as a freely downloadable PDF from this page.

For more domestic energy advice, view all our advice pages.

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Depending on where you live, and who you buy your energy from, we can help you with grants and support.

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