Help - Air source heat pump and 1K/month bills!

bob2302

Spoonie_Turtle said:

I was responding to a poster who hadn't realised that's what the previous person meant by that being a clue the work was shoddy (although as you say, the OP may not have got that understanding right) … lots of communication not quite working here, it seems

I did realize, I just didn't believe that the OP had diagnosed the problem correctly. It doesn't seem very likely that ohmic heating of hot water could account for a  £1k a month. 

matt_drummer

Yep, treating a heat pump like a gas or oil boiler is a recipe for large bills!

They need to run at the lowest possible flow temperatures and for as long as possible to be most efficient.

Turning them off because they are using a lot of electricity on start up is completely the wrong approach.

If the radiators need to be red hot to give out sufficient heat the they are not big enough.

BobT36

bob2302 said:

Reed_Richards said:

12NJK said:

 for some reason best known to the heating advisers, there is no connection between the hot water heater and the air source heat pump.

Sometimes there is a clue that work has been done really shoddily.

My understanding is that the most efficient way to heat with heat pumps is to use big radiators  

Good luck with that in most new builds, they're fitting baby-sized radiators in every room regardless of size. 

ukbill69

bob2302 said:

Reed_Richards said:

12NJK said:

 for some reason best known to the heating advisers, there is no connection between the hot water heater and the air source heat pump.

Sometimes there is a clue that work has been done really shoddily.

Is that really wrong? My understanding is that the most efficient way to heat with heat pumps is to use big radiators and keep the pump's output temperature as low as possible - far below what's needed for hot water.  

Not true, its the pipework I think 22mm or 28mm pipes was fitted in mine, they go right up to almost floor level and then 15mm copper to rads.

ukbill69

The fitter of mine, turned on booster and I said why, anyway when he was gone, turned it off. Never had issue. Also depending on your model, I have a vaillant arotherm plus and its been good, but it did need better settings on it. I did do a review on this, on my poplar video https://youtu.be/lpRNEcK3fGA