Heat Pump Running Costs

2421KWH for the year, 733 of this was hot water. A2 house 260m2

Bar the hot water, heating was exclusively on night rate @ 14c inc VAT

(Water heating can come on at any time) Mitsubishi Ecodan HP, during winter maintains a pretty constant 20' but could dip to 19' on freezing mornings but would recover back to 20'+

2022 was 2559Kwh

2021 was 2774Kwh

Pretty consistent and very happy with cost, your looking at under E500 to heat the house and provide constant hot water for the year.

HP running at about 20kw per day this cold week, could prob do with a bump as ive seen 19' by night in the house.

Very low usage, I'm averaging about 30kWh at the moment due to cold spell.

Lad I know has a Geothermal System from 10 + years ago , His bills are massive and we looked at his half hourly usage the other day (recent smart meter installed) and this week he is using 150 to 180 units per day ! What can he do to lower the usage - Installer not interested in resolving.

Yea it's really hard to know how to help without you providing as much info as you can.

If house is block then it is going to use a lot in the 1st days to get building fabric up to temp. Timber frame much faster(but cools faster too).

House size?

Underfloor/rads?

Heat pump: brand? Split/mono? Size?

What temp is dhw set to heat to?

Unit usage before and after renovation(not how much the bill was) . Ideally compare to unit usage of the same periodbut the year before. Or go into heat pump controller to find your usage. All heat pumps should show this.

My 7 day average is up around 30 kWh/day and that includes DHW eg showers which is pretty good. No where near as much as December 22 (42kWh/day) where we had another really cold spell but that was a lot more windy. What I find if its windy it sucks a lot more heat out but this spell of weather is way more settled.

Hoping this does not derail thread but what kind of electricity plan would most heat pump users have. Like is there a call for electricity for heatpump 24/7 or can the majority of heating been done via a day/night plan thus most of the kWh used is at least at a cheaper rate?

Similarly would it crazy to switch to smart plan with like 3-4 hour EV cheap rate but higher day rate as you'd be using expensive day rate for most of the winter to power heatpump?

Approx 28-30 this snap including dhw. Running fixed flow 31 9am to 10pm. House cools to 19/20 overnight and back to 21/22 by midday. Last winter would have been using 60+ on these days with installer settings 242sqm ufh.

Do you mind me asking what were the errant installer settings?

How do you open the zones?

Using approx 15kwh per day for heating and 3.5kwh for hot water. 220m2 recently renovated. Inside temps around 20-21 degrees. Running weather comp. Flows approx 27 degrees

Unreal usage in this weather. My hp cycles too much below x28 but not hope 27 would, get my house to 22/21.

Have you a lots of loops in your ufh? Haven't seen that low flow temp these conditions before.

I would try running a fixed flow of 31 for say 13 hours and on again at 9am. See how the house reacts. That's my exact schedule. Best I found so far. Again though that doesn't mean it will work for your house. Have you insulation done?

13 loops. I think it's low cause build quality and insulation is very high. House has a continuous unbroken wrap of insulation. UFH throughout. It's also airtight, triple glazed with heat recovery.

Our a2w hit 75-85kw usage yesterday. Previous two days 55-65 each day, had been 20-25 up to the cold spell. 😔

Label each actuator for what loop it is before removing. You could try dominatinmc approach first, fixed flow before my approach. He has similar usage to me.