Heat Pump Running Costs

Going by usage and not taking account of day and ev units, on ESBN we had a total of 1141.3 for Jan so close to 33% was for heat and hot water.

We are now a full electric household so the 1141 includes for two EV's also, previously I was paying more for diesel just to run a van for the month.

I would expect Oct - Nov, Dec - Jan are the only billing cycles that we will actually pay for electricity and hope to be cost neutral or in profit for the remainder.

What size is the house?

442kwh for Jan 22 downstairs and 19 upstairs UFH downstairs and Alu Rad upstairs this includes Hot water. House is 200swm retro fit with external wall insulation.

I know this will be a varying answer as every house size is different and everybodys usage will be different etc

But roughly, how much are your 2 month electricity bills on average during the colder winter months?

There is some great information, insights and analysis in this thread - thanks.

I am running a Samsung Joule HP system, full UFH throughout bottom floor of a mostly bungalow (2450 sq ft)and stats on a schedule and I have been experimenting on and off for a couple of years and happy to see I am in line with many on here in terms of average kwh usage.

I do have a question and hoping someone might have some advice. I have a single insulated office/gym space in my upstairs (4m x 7m) and it is wired and ready for two smart electric radiators in the future though I suspect one large is enough. It is a warm space 9 months a year due to solar gain from two velux windows and also a bit of heat rising through the stairs entry.

The latest cold snap has got me thinking about adding the electric rads/panels again as I did feel a chill working in the space in December and January. Wondering if anyone has taken advantage of their heat pump for a similar heat requirement?

The electric radiator seems quick, easy and relatively low up-front cost (300-400 euro for the rad) but perhaps I am missing a trick with my plant room being directly beneath the space.

Also curious - what are you guys using to clean the coils on the outside unit?

My last one covered Nov & Dec and was around €350 excluding government credit.

Expecting another big one next month which will cover Jan&Feb, then hopefully plain sailing until next Winter.

Really impressive low heating costs here for the house sizes mentioned.

In term of total running costs ..ie + depreciation.

I'm just wondering what the typical life span for an Air to water unit is? Less than 10 years? (I've A standard oil burner that'll go for 20yrs + easily, indoor model).with maybe a 5 to 6k replacement cost.

Would the depreciation be €1,500 per year for an Air to water unit replacement. (I've read some disaster stories here on boards where models went out of state & parts not available.)

Just completing an online survey and obviously Energia are looking at the tariffs with heat pumps in mind, this is one of the questions:-

That was my thinking as I don't know how they could differentiate.

Even though the graphs are the wrong way around I think having the two cheap windows, depending on price, would be the way to go and allow a bit of flexibility for charging batteries, ev's etc. In winter, dull days you could be charging a battery at night for the morning and in the afternoon to get you through the evening.

assume it would be similar to what OVO have in the UK, where you allow the electricity provide to connect to your heatpump data.

https://www.ovoenergy.com/heat-pump-plus

Feb stats for myself.

245 m2, A3 rated dormer bungalow. UFH downstairs and rads upstairs

527 kWh which is comprised of 103 for DHW and 424 for heating. Bit on the high side for my liking but I'd attribute some of that usage to a dodgy HP service which reset some settings and had the HP consuming too much energy.

In any case, that 527 kWh converts to 2.15 kWh/m2 which isn't too far from the previous poster.

A1 210sqm house. Used 197kWh for heat and 54kWh for hot water. UFH upstairs and down. Hotwater set at 50c and downstairs set to 21.5c We run the heatpump at night rate 11-8am and hotwater at 2am on ev rate.

Heating cost 25.61 euros and hot water 3.42 euros for the month of Feb.

you dont run the HP at all during the day?