UPDATED: Air Source Heat Pumps/Air Con - Full Info & Guide, is it cheaper to run than mains gas?

richardc1983

lovesgshp wrote: »

Look at P15 of the manual you emailed me, that gives a lot of info. Set the unit up in test mode, you do need a 17ltm flow rate. Check the filter to make sure it is clean on the heating circuit.

Yes that is all set correctly other than flow rate is too low and should be 30l on this model. Awaiting installers to sort this.

lovesgshp

Think we may have come to the stop on this, until the flow problems etc are resolved. Still suggest that you change the reduction in temperature of the room to only 1-2C less than what currently have.

richardc1983

It's only set 2c less from 21c to 19c on the night set back is that what you mean?

lovesgshp

richardc1983 wrote: »

It's only set 2c less from 21c to 19c on the night set back is that what you mean?

Yes, you need to balance the room temps evenly and not get the pump working too much to compensate.
What is the house size in m2.

richardc1983

lovesgshp wrote: »

Yes, you need to balance the room temps evenly and not get the pump working too much to compensate.
What is the house size in m2.

I'll have to get back to you on that.

crumbleman

Hi,
I’m looking for some advice if anyone can help.
Shortly I will be having a house built in North East Scotland, where temperatures can often be well below freezing for days at a time. I am trying to decide which heating system to install. The developer has costed for a mains gas fuelled system boiler and suggests that as the property will have four bathrooms a system boiler provides sufficient hot water and heating. There will be underfloor heating installed on both floors.
I would like to install some renewables, taking advantage of the great interest free loans and RHI, I have considered ASHP, GSHP and solar thermal. Looking at the great MSE forums there seems to be great disparity between what the manufactures state these systems will provide and how they operate and what end users are actually finding.
One of the themes of the heat pump forums is that they seem to not be fit and forget technology in the way that a gas boiler would be, is this due to poor installation and specification from the start or is it just part of running a heat pump?
So as I’m going to be on mains gas should I even be considering a heat pump and if so any suggestions on which type?
Should there be any difference in the design of underfloor heating if the heating is provided by the system boiler or a heat pump?
Thanks in advance.

richardc1983

In a nutshell if you have mains gas stick with mains gas it is cheaper per unit of gas than it is per unit of electricity and will be for some years in this country.

lovesgshp

Agree with richard, if you have mains gas then stay with it.

TiredGeek

Another agreement for gas.
You'll save more in the long run by spending more on insulation than by fitting a heat pump / renewables system.

Cardew

crumbleman wrote: »

Should there be any difference in the design of underfloor heating if the heating is provided by the system boiler or a heat pump?
Thanks in advance.

Obviously another vote for gas.


Underfloor heating for a heat pump is designed so that water at 30C to 35C will raise the room temperature to the desired level - the lower the water temperature the higher the efficiency with a heat pump.


With a system boiler the water can be double that temperature.


Rather than solar thermal, have you considered Solar PV?