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Just replace the boiler in a 
90-140 sq m house.

"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 

Install a
heat battery and a smart hot water cylinder to supply hot water and heating.  The addition of the tank gives you more power output, more flexibility of use and ultimately reduces your bills because you are almost guaranteed to charge only at night.

Bear in mind
The combination can be very
for the house's main fuse, so you should speak to an electrician to ensure you won't need to upgrade your power supply.
The heat battery is quite heavy, so ideally, it should be installed on the ground floor.

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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