Heat Pumps - post here.

Has anyone retrofitted air-water roof panels into an old stone farmhouse with existing back boiler and OFCH? House is recently fully externally insulated, triple-glazed PVC windows. Attic is a balls though cos only approx half is insulated due to the design (vaulted ceilings upstairs mean there is no space between ceiling and roof to put insulation without blocking ventilation to roofspace) but I'm trying to look into rectifying that.

Is it a waste of time/money unless the house is totally and utterly insulated to the Nth degree?

Yep, my bad, sorry. I misunderstood what air source heat pumps were.

Anyway, allow me to rephrase that while the embarrasment fades.

Has anyone retrofitted an air source heat pump into an old stone farmhouse with existing back boiler and OFCH?

Does the house essentially have to be sealed tight as a drum or you're burning money? Chimneys bad etc?

You mean on for a hour here and there like the gas: no.

You may need to upscale the rads.

yes you can turn pumps off entirely over the summer. A lot of people would leave them on as they will automatically know they arent needed, and some units can indeed I believe cool a home

So your homework on insulation / airtightness requirements. There's many disappointed folks out there expecting same levels of performance as gas or oil. Go in with your eyes well wide open. If your house isn't suitable you'll have to do other works to make it suitable.

Cooling without dehumidification can be a recipe for disaster.

Warm air rises, cold air will not, it will sit on the slab

If you drop the temp below the dew point which depends on the RH then you will get condensation

its a bigger problem with MVHR in humid days in summer,

Would just be using the heat pump for cooling for a few weeks in summer. Is condensation that big an issue for a few weeks?

Have limited knowledge of heat pumps. Still can't find a company in cork who retrofit ductless mvhr( came across a company in Dublin that do this and seems the best approach for a 4 room house). Would love to invest in heat pump (especially after hearing about the cooling effect) but until sort the MHRV issue, then the gas boiler upgrade is winning out as less complicated .

So would that be a case of just ensuring the stat is set above the DP on a hot day?

Hadn't known what air to air heat pumps do. They're cheaper to install from my quick google? Wonder if might be more suitable option for us. I hate the house being too warm. We have an electric shower ,no immersion,so what's the need for hot water in taps anyway? We rarely have it . Alot of fact finding in store for me in next few months before decide what to do.

I have a NIBE heat pump and use it to cool during the summer with UFH. No issues but the information mentioned about the dew point by others is very valid.

Wonder if cooling only works with ufh which we don't have. Have rung a few local companies about heat pumps and mvhr but none of them have come back to me.

Hi.. we moved into a house with a air to water heat pump early last year. We were just wondering if we need to get it serviced. How often? We way that heat merchants for a bronze, silver and gold service package..are they worth it..also is it worth fitting the Smart Cloud Remote Monitoring & Control module that is available or is it a waste of money?

Hi

We have a heat pump for the last 8 yrs .. the heating will be switched off around April, what means the heat pump is used for warm water only. About cooling ...... really you really want to spend money to cool your house ? Bear in mind that the cooling is not going to be very efficient .. = more cost.

To replace the gas boiler yes , you can retro fit but the temperature of the water from the heat pump is lower so you need to tweak on the radiators ( replace with more efficient once ) potentially .. also bear in mind your insulation .. the better the insulation the less energy you need.

At the moment we use level pay whereby we level out the bills of the winter through the summer ( most electricity providers have a option for that) it works well for me .. (before I get a ton of responses) So far I have had one major fault on the heatpump that I managed to fix myself .. the softstarter failed.. quick replacement and we're back up and running

outside unit did not start ( breaker flipped as well) .. and a good few alarms on internal unit. I have the heat pump online and received a couple of emails from the heat pump. For 8 yrs one Soft starter is not that bad. what is a challenge was the availability of someone to fix it .. (did it myself in the end .. not very difficult but again you need some experience with electrics )

We're in the process of doing that. As mentioned elsewhere, during the months when there is maximum sunshine, there is minimal heat pump operation! But I'm hoping that there is some overlap, and we've sized a slightly larger battery (8.2kWh) against the array size (5.55kW) for that reason.