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That’s pretty good considering you have solid walls!
our 80sqm 2 bed flat costs £160 PM for gas and electricity in a very cold month with most of the rooms at 21º-22º 8am-12pm and the bath full to the brim with piping hot water that’s too hot for me but not my partner.
We are both home most days, what can make a difference is the sun coming out even if it’s freezing outside that can warm the lounge up to 23º+ and mean the boiler isn’t firing up until late afternoon.
Have found an issue with some cold bridging on a concrete pillar that’s part of the external wall in a wardrobe that’s rammed full and not been opened, there’s been some condensation and a bit of mould on the clothes squeezed up against the uninsulated wall/pillar, i have some insulated plasterboard left over so i’ll do that section in the summer. there’s a concrete pillar in some room corners which i always knew would be a cold bridge after insulating the walls but it’s this one with no airflow in the cupboard that’s caused problems.
the flat is usually around 45-55% humidity and doesn’t get above 60% when washing is hanging up but a small Maeco de-humidifier might be on order.
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Mr_Smyth
Fackinell, £20!!
Just to soothe you, our ~145sqm half-insulated solid brick house needed 29kWh of electric to run the heat pump yesterday, average outdoor temp of 1 degC, entire house at 21 degC 24 hours a day (heating is always on). Cost for this, including full 250L tank of hot water, was £4.60 on Tomato Lifestyle.
Who's installing your ASHP, and which one are you getting?