Detached property, hosted by Andy

Old traditional Cornish stone cottage with extensions (EPC F).  Ongoing major renovation and retrofitting project.  300mm+ loft insulation.  Double glazing throughout.  No EWI or IWI (wall insulation) on solid stone walls.  No cavity wall insulation (1970's extension).  Decided to install UFH throughout - this was a big and disruptive job, but glad we did it.  Have plans for another extension.  We have done a lot of the building and prep work ourselves.  The actual installation week went very well.  Also installed: 3.84kWp solar array and a 9.5kWh/3kW AC coupled Givenergy home battery system.  Currently on Octopus Cosy time-of-use tariff.

Stiebel Eltron ASHP (WPL25AS; A2/W35: 8.32kW; A-7/W35: 13.05kW); positioned 13m from the property (underground insulated pipes); 100-litre buffer tank; 300-litre DHW tank; DHW secondary return installed; heating circuit: UFH throughout ground floor, radiators first floor; Heatmiser controls for the heating circuit.  Very pleased with: comfort and hot water, efficiency, reduced emissions, and cost effectiveness.