Installed heating explained
Installed heating refers to permanent fitted system for a single room or the whole house. There are two types of installed electric heater:
Designed to use standard rate electricity, these provide fairly instant heat when they are switched on. Panel heaters, convector heaters, fan heaters, electric radiators and radiant heaters fall into this category, providing heat only for the time they are energised.
Direct-acting heaters are 100% efficient at point of use and are used mostly for rooms which only require heating for short periods, like bedrooms – although in compact, well insulated modern properties, they can be used as a complete heating system.
On a given tariff, 1kWh of energy used will cost the same, whether it’s a fan heater, panel heater, oil-filled radiator or even a hairdryer using it. The key to improving efficiency is to use products that have thermostatic control to ensure that the room is not overheated, thereby saving energy.
Off-peak Quantum heaters and storage heaters
These absorb energy in the form of heat from electricity when it is supplied at a lower price (usually at night) and store this for slow release over an extended period.
If the Quantum or storage heater takes a full charge and has a rating of 18kWh, and is charged for seven hours, then it will cost 18 x 7 x cost of a unit of off-peak electricity, per day.
Since Quantum and storage heaters use energy supplied by low-cost, off-peak electricity for a given property, they will always be cheaper to run over a 16-hour day than direct-acting heaters, such as electric radiators or convectors, which use standard rate electricity.