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Just replace the boiler in a garden flat. 90-140 square metres.

"A boiler needs replacing" was the condition we originally set out to investigate and solve. Small flats without gardens or terraces that are not planned to be refurbished will be the most important category that will make or break our transition away from gas, one boiler at a time. For this to happen, we need cost-effective and unintrusive solutions.
Depending on the condition of the heating system and your budget, you have two options.

Option 1 

A smart heat battery is potentially a like for like replacement for a boiler (albeit larger and heavier). Combining it with a
smart immersion tankgives you enough power output and flexibility of use. 

Approximate cost: £8,500 

Option 2 

Infrared heati
ng combined with a smart immersion tank is also an option. Infrared requires some building work to connect the panels to the electric supply and install new thermostats. You will also need space for a heat battery for the hot water.

Approximate cost: £7-8,000 for infrared panels

£16-19,000 with plastered-in thin film infrared

One last thing, not needing refurbishment doesn't mean you can't attempt minimal improvements to the building itself. Sealing front doors and leaky windows brings amazing returns in investment and comfort. Replacing or increasing the loft insulation does not require any demolition. In some cases, very smart robots can also insulate under the ground floor floorboards through the undercroft.

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