Storage heaters were developed in the 1960s as a low cost heating system that could take advantage of night time electricity tariffs like Economy 7. Demand for electricity is lower at night time but it’s not easy to shut down a power station so electricity suppliers offer cheaper rates during off-peak hours to encourage their customers to use more electricity during those hours.

Storage heaters contain bricks made of special materials that are very good at storing heat. The bricks have heating elements embedded in them and they are surrounded by insulation trapping the heat inside. The heat is released throughout the following day and then the storage heater charges up again when night comes. Storage heaters were very popular for a time but the technology was very basic and they had limited controls. They would often release heat when you didn’t want them to and that heat would quickly run out.

High Heat Retention Storage Heaters are the 21st century version of this technology and the improvements are significant. As such all High Heat Retention Storage Heaters are LOT20 compliant. This is the legal directive that specifies minimum energy efficiency standards for electric heating systems