Should I replace my old night storage heaters

Hi I have two 15 years+ old Dimplex night storage heaters one of which has stopped working. Should I upgrade to modern storage heaters or change to an air source heat pump or wet underfloor heating downstairs. I have a wood burner as well and oil filled electric radiators in the 2 bedrooms. I’m on Economy 7 and have a 10 year old electric hot water tank. My grade II listed house is stone/cob so not great insulation.

Many thanks


  • QrizB
    QrizB Posts: 13,624
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    Do your old (but not ancient) storage heaters keep your house warm? If so, fixing the broken one might be the most economical option. It's unlikely to need more than £100 in parts, unless something really drastic has happened to it.
    New HHR storage heaters will cost £6-700 each, plus fitting if you aren't comfortable doing it yourself.
    You can get an idea of the cost of an ASHP from Octopus here:
    N. Hampshire, he/him. Octopus Go elec & Tracker gas / Shell BB / Lyca mobi. Ripple Kirk Hill member.
    2.72kWp PV facing SSW installed Jan 2012. 11 x 247w panels, 3.6kw inverter. 30MWh generated, long-term average 2.6 Os.
    Ofgem cap table, Ofgem cap explainer. Economy 7 cap explainer. Gas vs E7 vs peak elec heating costs.
  • My grade II listed house is stone/cob so not great insulation.

    Cob is quite a good insulator but also has a high thermal mass. Stone also has a high thermal mass. I suspect a heat pump would pair well with that construction, if you use the "low and slow" approach to heating. A coat of hemp and lime render on the outside of the house would confer some insulation as well as allowing the walls "breathe".

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