Heat Pumps - post here.

fairly close to what the PHPP calculated. if i upped my solar array by another 1.2kW it would bring the Energy Value down to zero.

@randombar I suppose for it to run at max efficiencies & COP that is what is required however you could ask him to design to a higher flow temperature and see if that makes a difference to your radiatior sizes.

It will mean that your efficiencies are lower though.

For the sake of the better efficiencies it would probably be worth it all right.

Rads are under windows so would be limited by height but I could go 600 high maybe and narrow it down.

option to move rad away from windows?

Not easily, had a look this evening a 600 rad.

500x2000 = 600x1600 ish

Also waiting on heat loss survey so hopefully figures might go down a bit.

Triple panel looks good but coming out into the room a good bit.

For heat pumps? I was quoted a similar price for a heat pump and cylinder by a local distributor in Cork. In the end I went with a supplier from Louth. Both were competitive compared to the quote I got from a supplier in Larne. That is supply only, my plumber is fitting.

indeed. my plumber was happy for me to order it from the distributor. i got it for the same price he was quoted previously.

i discussed the various brands out there and he personally recommended thermia as he had installed a number of them including at his brother and sisters homes respectively without the slightest issue. the spark ran the cabling for the thermostats, outdoor unit and cylinder. it ain't rocket science to these lads.

It depends on the make of unit. My outdoor and indoor units are thermia. According to the plumber they are a fairly simple design and easy to install as the cylinder is pre-plumbed. He advised against other named brands which I won't mention as they are difficult (he used more colourful language) to get at when a problem occurs or he has had to return to sort out warranty issues with them.

When it comes to installing what the plumber has to do is run two 50mm (I think that's the diameter) pipes from the outdoor unit to the cylinder and connect the cylinder to the rads/UFH manifolds and mains. It isn't rocket science and doesn't take very long. Depends on location but my house took a couple of days max. The sparky has to run power from consumer unit to the outdoor unit, a thermostat cable to the outdoor unit and thermostat cabling throughout the house. He then needs to wire the cylinder.

well it depends on a number of factors e.g. how many litres is your tank, how long do the adults take in the shower etc.

the best way to find out is to record what happens on a daily basis and judge over lets say a two week period. the data should inform whether you need to reduce or extend the durations the HP kicks in. it might take a few goes before you're happy with the output from the HP.

I'd imagine so although the user guide should be able to tell you that. the thing is though is if the tank doesn't reach the desired temperature in that timescale will the HP cut off? highly unlikely not to reach that temp in two hours but lets say you change it to 1 hour.

seems a good plan ill try that! no idea what size the tank is, will see if i can find out.

https://youtu.be/AXamAjE0juw?si=UBfmhYDjiEhCZJ-1

What are peoples advice on wall vs ground mount for a heat pump?

Heatgeeks seem to think alley ways are less of a problem:https://youtu.be/L5O2BSFqWwY?si=-QKnC6OlIs1lgKd_