GSHP - I need help with making it as efficient as possible!

markin

Where you able to reduce you daily KWH for Feb, March comparing it to previous years readings? This year was apparently mild so may make it difficult to tell, if that applies to Scotland.

countryhouse39

Actually - frighteningly - you were right - it was the reading for just from midnight til 10am. Yesterday usage was 29.6kwh. It’s not been great weather here yesterday, but pump hasn’t been on that much, just sits at this base rate of almost 1kwh which seems insane to me. Any ideas what ‘resting’ rate I should expect?? Thanks

Reed_Richards

29.6 kWh of electricity usage should have given you at least 60 kWh of heat.  That's a lot; something you would surely notice.  Something must be wrong; as a sanity check, this much electricity must be most of what your house is using so is your house electricity meter recording over 30 kWh of use per day? 

countryhouse39

Stupidly I didn’t take main meter readings yesterday, so I don’t know. But have taken a reading at 9am this morning and will check both later today again to compare, but recently we have been using more than I expected for the weather actually in the region of 35kwh a day…but that’s an average over about a week. I will take readings daily for a bit to check it out. 

paul991

i can not  see why your consumption is so high this time of year has it  got a back up water heater that is  on and do these readings stack up with your house meter reading.
failing that get a small monitor like a shelly at put on different parts of  the heater    

Magnitio

Have you tried contacting Vaillant for advice? Some manufacturers are quite helpful and if you provide them with the details of the equipment you have (serial numbers etc) and the issues you are experiencing, they may be able to help or put you in contact with local experts.

Reed_Richards

paul991 said:

i can not  see why your consumption is so high this time of year has it  got a back up water heater that is  on 

Even then it must be water in an uninsulated container or the water would get too hot and a safety cut-out would operate.  It's rather as if the heat pump is running backwards and heating the ground; is it capable of a cooling/air conditioning mode?

1961Nick

countryhouse39 said:

Stupidly I didn’t take main meter readings yesterday, so I don’t know. But have taken a reading at 9am this morning and will check both later today again to compare, but recently we have been using more than I expected for the weather actually in the region of 35kwh a day…but that’s an average over about a week. I will take readings daily for a bit to check it out. 

Have you got a tank stat that's set higher than the flow temperature? 

countryhouse39

Reed - not as far as I’m aware, no, no cooling mode! 

1961Nick - hmmm, I have no idea about a tank stat, but we did turn the flow temp down recently, hoping to save money - so this might be possible. 

countryhouse39

Can I check - when you ask about whether we are heating a swimming pool or something - how much electricity should it take to heat a full domestic HWT? Trying to get an idea of just how much over the expected we are…