Electric Storage Heaters

How Efficient is Your Storage Heaters ?

These heating units are typically found in apartments, where there is no mains gas available. They are connected to a 2 rate electricity meter (also known as Economy 7) as they use the cheaper night tame rated supply to generate and store electricity within the units. There are thermal blocks built into the heaters, which retain the heat, and this can then be released the following day, as required.

These heaters are not the most efficient, as it is not always easy to predict the following 24hours temperatures, and ensure that you have generated and stored the heat over night, to release. . They can be switched on manually, but this makes them very uneconomical to use, as they use electricity at the expense day rate. Hot water is generated via a cylinder, and an emersion heater, which is a control which purely manages the water temperature within the cylinder.

Quantum stores energy up during periods of low demand, turning it into efficient heat only when needed. Through its use of a sophisticated self-learning algorithm, our IQ controller is able to take just the right amount of heat to match the user’s lifestyle and changing weather, intuitively and precisely.

Quantum is up to 27% cheaper to run than a standard storage heater system. It's also up to 47% cheaper to run than an electric convector or radiator system.*

Quantum is fitted with our iQ controller so you can pre-set your heating requirements – just like central heating. Manual adjustment, if required, is also simple with its easy-to-read LCD display and user-friendly low torque rotary knob – designed with the visually impaired in mind.

If your Storage Heaters looks old and your energy bills feel expensive, then most likely you would be better off with our advice. A good quality condensing boiler can offer considerable savings on your annual fuel bills.

The running costs of electric heating systems in the case study documented are calculated using energy consumptions derived from SAP2012 energy use estimation methods. This energy use is combined with a standard electric heating tariff for electric radiators and an Economy 7 tariff for storage heaters and Quantum. The kWh unit rates are as stated in SAP2012 Table 12 (BRE – published on behalf of DECC) ‘SAP2012 – the Government’s Standard Assessment Procedure for Energy Rating of Dwellings’, 2012 edition, February 2014.

With these assumptions SAP2012 has been used to calculate the space heating running costs for 3 property types with two different levels of insulation. The first level of insulation is based on 1960s building regulations and air tightness, whilst the second level of insulation is based on 1990s standards. The annual space heating energy requirements are based on average regional weather conditions for Northern Ireland.

The results show that certain properties with a Quantum heating system using an E7 tariff can reduce, on average, running costs by between 44-47% when compared with direct acting systems such as electric radiators using a standard tariff. Quantum can also achieve savings of up to 27% if used in a property to displace conventional manual storage heaters on an E7 tariff.

40m2 1-Bed Flat

Annual space heating energy requirement - 6,840kWh

Built with typical 1960's Building Regulations

  • Direct acting electric radiators
  • Manual charge storage heating and panel heaters
  • Quantum and panel convector heaters
  • £902 (Standard tariff)
  • £664 (E7 tariff)
  • £494 (E7 tariff)

Refurbished with typical 1990's Building Regulations

  • Direct acting electric radiators
  • Manual charge storage heating and panel heaters
  • Quantum and panel convector heaters
  • £523 (Standard tariff)
  • £371 (E7 tariff)
  • £291 (E7 tariff)

65m2 2-Bed Flat

Annual space heating energy requirement - 10,610kWh

Built with typical 1960's Building Regulations

  • Direct acting electric radiators
  • Manual charge storage heating and panel heaters
  • Quantum and panel convector heaters
  • £1,399 (Standard tariff)
  • £985 (E7 tariff)
  • £745 (E7 tariff)

Refurbished with typical 1990's Building Regulations

  • Direct acting electric radiators
  • Manual charge storage heating and panel heaters
  • Quantum and panel convector heaters
  • £849 (Standard tariff)
  • £575 (E7 tariff)
  • £455 (E7 tariff)

90m2 3-Bed Semi-Detached House

Annual space heating energy requirement - 15,910kWh

Built with typical 1960's Building Regulations

  • Direct acting electric radiators
  • Manual charge storage heating and panel heaters
  • Quantum and panel convector heaters
  • £2,099 (Standard tariff)
  • £1,542 (E7 tariff)
  • £1,124 (E7 tariff)

Refurbished with typical 1990's Building Regulations

  • Direct acting electric radiators
  • Manual charge storage heating and panel heaters
  • Quantum and panel convector heaters
  • £1,248 (Standard tariff)
  • £857 (E7 tariff)
  • £663 (E7 tariff)
* Calculated using SAP2012 – the only Government approved energy performance assessment method.

Each manufacturer will provide a manual for their specific unit, but generally they have few controls and so are quite straightforward to operate.

Electricity is an expensive means of fuel, but by using storage heaters correctly and effectively, you will maximise their efficiency by generating the heat during the night, at the lower tariff electricity.

NO, storage heaters need to be installed by a qualified electrician as they are wired into the main electrical supply of the property.

Contact your electricity supplier and request a 2 rate meter to be installed. This should be provided free of charge if you have storage heaters installed.

These are electricity tariffs set up to assist with managing storage heaters and other expensive appliances (EG tumble dryers). The economy 7 operates roughly between 12 midnight- 7am (check with your supplier for exact times) at a cheaper rate, when your storage heaters are charging, and can also be a good time to run appliances such as dishwashers and tumble driers, via a timer, at the reduced electricity rate. Economy 10 also offers a discounted rate during the afternoon, but again you would need to check with your supplier for availability and details.

In order for your Quantum to qualify for the standard 2 years, plus an additional 8 years warranty, you must register your details by clicking here, This offer is only applicable for any Dimplex Quantum heater installed on or after 1st October 2014.

Applying for Funding

ECO grant funding is available for qualifying occupants and households, to replace electric storage heaters with new models. Please contact our office to see if you qualify for this funding.

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