Set to 20 on the thermostat on wall inside.What temperature is it set to for the rooms? Surely not 28!!
Might be a silly question, but are you sure that internal thermostat is connected to the heatpump and not part of the legacy heating system? I just recently put in a Viessmann heatpump and as the weather has now cooled down I'm playing around with the temperature and heat curves to get the house temperature right. With the Viessmann though it only uses the temperatures/curves you set in the app or on the heatpump itself and an external weather sensor, there are no room sensors. But I do have a bunch of old thermostats on the walls to catch out unsuspecting future ownersI have tried adjusting the control on wall inside but it doesnt have much of an affect and bills remain very high.
What do you mean by high?Hi,
I have a danfoss geothermal heatpump.
Our house is pretty warm and our bills are pretty high!
I have tried adjusting the control on wall inside but it doesnt have much of an affect and bills remain very high.
Am I right in saying, if i adjust the heat curve within the heat pump settings itself that might be a more effective way to get my desired temperature? I was thinking of using trial and error and adjust it by 1 degree to see if it makes a difference.
Does anyone have any advice re this?
Thanks.
Arthur, do you have rads or underfloor heating? Rads would need flow temps of 35-45oC, but underfloor might only need flow temps of 23-28oC.Set to 20 on the thermostat on wall inside.
Below is my current heat curve settings (cant share an image of it). Any questions/comments on it, does it look ok?
Heat curve = 26°
Min = 14°
Max = 44°
Curve +5 = 1°
Curve 0 =0°
Curve +5 = 0°
Heat Stop = 16°
Our electricity bill is high by all accounts its 13000kwh per annum (if that makes sense?) Roughly is 3 times national avg.What do you mean by high?
Do you know how much juice your heat pump alone is using every day?
There are legacy thermostats throughout house but theres 1 central one we have been told to use by past owner and plumber that did original install in 2009.are you sure that internal thermostat is connected to the heatpump and not part of the legacy heating system?
House is 3,300 sq feet. No EV but a lot of washing machine use. Other than that nothing out of the ordinary. Electriciry company have even said to me that we re very high domestic usersWhat size is the house Arthur? Anything else using electricity like an EV, or is that 13,000kWh mostly heating and lighting?
House is 3,300 sq feet.
A little perspective is needed here...Our electricity bill is high by all accounts its 13000kwh per annum (if that makes sense?) Roughly is 3 times national avg
But going back to your original issue, we had a similar problem last with the thermostats in that the builder installed fairly basic and useless stats that had too much hysteresis so the house was always fluctuating in temperature. When set too low, the heating just didn't come on.I have tried adjusting the control on wall inside but it doesnt have much of an affect and bills remain very high.
Am I right in saying, if i adjust the heat curve within the heat pump settings itself that might be a more effective way to get my desired temperature?
Thanks, ill check the videos out.Heat Geek
Can I ask - how did you calcuate this. The BER is B3.At 13,000kWh for 306sqm, your property is using 42.5kWh per SQM comfortably putting it in A2 category for BER
Im not so sure. Our bills are very high even allowing for having a large house. From speaking to others with similar house, our bills are off the charts. Through process of elimination its obvious to me that the heat pump is the culprit so if theres any way I can make it more efficient i will. Adjusting the heat curve might be the answer so ill trial reducing it and hopefully that will do the job.I would say your HP is already running very efficiently
the national average electricity usage used by the CRU of 4200kWh's is old
Something doesn't add up here?Secondly, the national average electricity usage used by the CRU of 4200kWh's is old, before many homes had HP's so it was mainly domestic use, i.e. lights, cooking, appliances etc. But it also included 11,000kWh's of space heating.
Just to be clear, I don't think the figure is wrong but it was last revised in 2017 so is based on data when very few HP's were installed so the 4200kWh is domestic use only. But the CRU also includes 11,000kWh of gas in their national average figures.Is it? I didnt know that. Its still the only measure im aware of re national average.
This is why so many people don't like the BER system. For you to buy the house, the seller had to get one done but it is finger in the air stuff for a lot of the inspectors. And they don't actually check the real electricity usage over the previous years.Can I ask - how did you calcuate this. The BER is B3.
Do these other properties have gas heating by any chance??house. From speaking to others with similar house, our bills are off the charts
Your electricity bills in summer vs winter should give you a good sense of whether it’s the heatpump or not. In August our 16kW ASHP used a total of 65kWh heating hot water for showers, no heating of the house. For October it looks like we’ll use 300kWh to cover water for showers and heating the house to a fairly warm temperature during the day.Through process of elimination its obvious to me that the heat pump is the culprit
At least 1 similar house with just geothermal pump and bills are a lot lower.Do these other properties have gas heating by any chance??
Have you had a look in the menus of the heatpump to see if it tells you how much power it's consuming, or perhaps there's an app you can connect? At the very least I think the Danfoss will tell you how many hours the 'internal immersions' have been running for, ideally you'd want that to be as low as possible. I know our system is newer, but in the app I can see live how much power it is using and has done over the last few months.At least 1 similar house with just geothermal pump and bills are a lot lower.
@Zenith63 thanks, this is what ill do. A bit of trial and error
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