Combination of increasing solar and sudden warm spell this weekend has suddenly seen our systems kick fully into shoulder season mode. Overnight battery load + solar is now seeing us through to 5/6pm and we just have the evening to pay full price on. Nice to see the smart meter stay at around £7 a day for heating, hot water and power.
We also spent the last couple of weekend's sealing and re-insulating one of our dormers. Taken it from 3cm of mineral wool and no air tightness measures to 20cm of PIR in the ceiling and 15cm in the walls and fighting as many drafts as we could.
Main point of interest to report back is that the smaller the gaps get, the harder the drafts seem to blow through them
. Think we got them all before closing everything back up.
That dormer is a bathroom, and WWHR is being installed. This should remove the need for an evening top up of the HW tank and save us £1-£1.50 a day. Real demonstrable ROI (although not as good as enforcing 4 minute showers would be, but I keep reminding myself this is not the way).