New Build, 7 months in with a Danfoss heatpump

matrat

Update as of 25 May 2019:

House located in Letterkenny, relatively sheltered site.
Total Number of Days Recorded: 1092 (156 weeks / 3 years)
Total Hours Heat Pump: 8715
Average Daily cost: €2.24 (Based on average 0.1928c per unit paid)
Average Weekly cost: €15.66
Total Heating cost: €1718.09
Total DHW cost: €724.68
Total HP cost: €2442.77

Heating Cost & DHW Costs calculated based upon figures provided by Danfoss for HP, each hour on Heat mode is 2kw, each hour on DHW mode is 2.7kw.

Lowest recorded temperature in kitchen is 19.9c.
Lowest recorded temperature in Master Bed is 19.1c.
No other sources of heat.
No maintenance costs, although may look into a HP Service this summer.

Overall still delighted we made the choice to go for Geo HP, completely faultless so far!

Please feel free with any questions etc.

KCross

matrat wrote: »

Average Daily cost: €2.24 (Based on average 0.1928c per unit paid)

You're not really paying 19c though, are you?

Surely you have night rate electricity and only paying a fraction of what youve shown above?

matrat

KCross wrote: »

You're not really paying 19c though, are you?

Surely you have night rate electricity and only paying a fraction of what youve shown above?

Yeah, take the total cost of bill, including VAT, divide by number of units and that's what I'm paying. Could switch to night rate but would mean taking more control of when appliances and hp are used etc which i may do in conjunction with using solar on our next build but not something we spent anytime working on at the min.

KCross

matrat wrote: »

Yeah, take the total cost of bill, including VAT, divide by number of units and that's what I'm paying. Could switch to night rate but would mean taking more control of when appliances and hp are used etc which i may do in conjunction with using solar on our next build but not something we spent anytime working on at the min.

I think you are screwing yourself big time.

You should be on a night rate bill. You will see significant reductions in your bills if you do.

Your heat pump runs at night and you can also tell it to only heat water at night. All of that will be done at half the price you are paying right now and doesnt require any micro managing on your part.

It will still run during the day too but if all your night usage is half the price you will see a reduction in your bills.


NOTE: When you switch to day/night rate your day rate will go up 1c/unit but your night rate will be half price and the standing charge is about an extra €45.... even with the extra standing charge and 1c increase on day rate you will still save significantly.

I currently pay 17.44/8.63 inc vat for day/night respectively. You are paying way over the odds.

Water John

Ha had misread that, didn't see the 3 years. so it's about €800/year. As Kcross says you should be able to knock a good bit off that, with night rate management.
BTW don't think I could sleep if the bedroom was at 19 C, staying very cosy.

matrat

Can't argue with your logic, will give bord gáis a call tomorrow and give it a go!! Thanks for the advice!

KCross

matrat wrote: »

Can't argue with your logic, will give bord gáis a call tomorrow and give it a go!! Thanks for the advice!

Price around. Energia and airtricity might be cheaper again.

Shaunoc

matrat wrote: »

Can't argue with your logic, will give bord gáis a call tomorrow and give it a go!! Thanks for the advice!

use the comparison sites and set a reminder annually and keep changing provider as they all do you after 12 months by upping the price per unit. never once have elec provider offered to match or beat unit price of the competitor so i switch every year. Treat them same as you would any other bill - only takes a few minutes. O yeah a night rate for the A2W !

Ging Ging

Hi guys, I built a 2,400sq ft house, single block on flat with external insulation (200mm), ground source danfoss heat pump (not borehole), heating and electricity on 12 months but only living in house 9 months, cost to date for all electricity (includes heating and hot water) is €1,115. Normal bill seemed to be €240ish every 2 months, last 2 months was €140, the heating barely kicked in all during this period so its hot water production plus other electricity usage, its on weather compensator so I didn't actually have to turn it on/off. The difference between latest bill and my winter bills is about 100 euro so I take it from this that last winter the heating cost about 50 euro per month to run, house always 19/20/21 degrees depending on stats, a few warm days might see solar gain push it to 22.


Heat pump is Danfoss DHP-H Opti 8 SP ground collector loop is 400m I think. MY question is there a better way to control hot water production, currently it gives it prioity and if it falls below a set point ( I think around 42 degrees) it will kick in and heat the tank up to 58. However I don't use a lot of hot water at the moment as it is only me living here, and as I am on night rate I would like to restrict it from automatically running during the day time higher cost hours. I cant see any options in the Danfoss controller to time hot water or anything like that.

matrat

My danfoss machine has a separate power supply for hot water over heating so you could always put a timer switch on the power feed but prob not advised. Might be a bit late now but I think more standard approaches are to use buffer tanks or solar tubes to achieve higher efficiency.

Ging Ging wrote: »

Hi guys, I built a 2,400sq ft house, single block on flat with external insulation (200mm), ground source danfoss heat pump (not borehole), heating and electricity on 12 months but only living in house 9 months, cost to date for all electricity (includes heating and hot water) is €1,115. Normal bill seemed to be €240ish every 2 months, last 2 months was €140, the heating barely kicked in all during this period so its hot water production plus other electricity usage, its on weather compensator so I didn't actually have to turn it on/off. The difference between latest bill and my winter bills is about 100 euro so I take it from this that last winter the heating cost about 50 euro per month to run, house always 19/20/21 degrees depending on stats, a few warm days might see solar gain push it to 22.


Heat pump is Danfoss DHP-H Opti 8 SP ground collector loop is 400m I think. MY question is there a better way to control hot water production, currently it gives it prioity and if it falls below a set point ( I think around 42 degrees) it will kick in and heat the tank up to 58. However I don't use a lot of hot water at the moment as it is only me living here, and as I am on night rate I would like to restrict it from automatically running during the day time higher cost hours. I cant see any options in the Danfoss controller to time hot water or anything like that.