What is a high heat retention storage heater. Is it just a posh name for the LOT20 storage heaters or are they something different.

Not a term I'd come across before, but a quick search suggests that "high heat retention" simply means that they have better thermal insulation (so they keep the heat inside for longer when it's not needed) - so a feature that's likely to be in LOT 20 devices, but LOT 20 looks at overall efficiency and will tend to include lots of other strategies as well (such as open window detection).

   - Andy.

Not a term I'd come across before, but a quick search suggests that "high heat retention" simply means that they have better thermal insulation (so they keep the heat inside for longer when it's not needed) - so a feature that's likely to be in LOT 20 devices, but LOT 20 looks at overall efficiency and will tend to include lots of other strategies as well (such as open window detection).

   - Andy.

Thanks Andy.  I was hoping that was all it was. Every time i searched the LOT20 heaters kept popping up.