To be frank, @profzarkov, I'm not sure that'd be a great idea whether it's possible or not.

If you do a simple search for "hive" on this forum you'll see several previous discussions on the subject. Hive might be a smarter thermostat but it's still a thermostat and, along with your new generic Neomitis ones, it can still only tell the heat pump to stop or start which is not the best, most efficient or most effective way for your heat pump to operate.

There are many people on here much more knowledgeable than me who can give far better advice than I could ever hope to, but the better scenario would normally be that the heat pump operates according to a weather compensation curve that has been tuned to keep your home to a constant temperature, and that the thermostats are set to a degree or two above the preferred internal temperature purely as a backstop. In effect, they should never normally take an active part, only overriding the heat pump in exceptional circumstances to avoid wasted energy if the room is already hot enough. In my case, the thermostats only really get used for stopping the heat pump doing its stuff if we've got the log burner going.

I'll wait for said more savvy forum members to drop by and give more detailed thoughts but you may be about to start a bit of a learning journey into changing your way of thinking about how to run your heating system. 

@majordennisbloodnok 

Hi

Thanks for that. Yes you're right the ashp is a much more sophisticated system than the old on/off boilers .

I just wanted the chance to access it remotely like when on holiday and to use the system via my phone rather than press annoying buttons in the hallway...

I'm due yet another inspection. Good old CES. This guy will be the 23rd person to visit our house...it seems never ending ...July thru September...still, it is for free!

I haven't a Samsung, @profzarkov, but I'd be immensely surprised if yours has been installed without making it internet-enabled and controllable via an app. I've just seen your thread about trying to get their "Smart Things" app working, so personally I'd concentrate on that rather than try hamstringing your new system with Hive.

@majordennisbloodnok 

Yes, it states that the WiFi is enabled, i.e. it's in blue but I can't detect any signal. Nor can Smart Things...

Neomitis have their own app Myneomitis, so depending on the thermostat model you have you may be able to connect to it remotely.

I have over the last six months stripped every unnecessary thing from the ASHP. So no longer have thermostat, buffer, volumiser, additional pump or mixer. Nearly 200m² on a single zone. My heat pump currently clicks on for half an hour every couple of hours (full weather compensation mode) only running overnight at the moment as that's all the heat pump sees it needs. When running I am getting CoP of between 6.0 and 6.5 (9.5 to 12 degs outside).

So to answer your question, no to Hive, and really consider getting rid of the other thermostats, your buffer etc. Operate fully open single zone, trv's on bedrooms if you need to keep them cooler. 

Do you need smart anything with an ASHP - not convinced you do. Just let it tick over low and slow.

@profzarkov welcome to the forums. The general consensus on Hive is that it’s not a good solution or product for heat pumps. Having said, I know several people that are working on a complete redesign that’ll make it ‘better’ for heat pump systems.

How many Neomitis thermostats have they fitted?

Posted by: @editor

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working on a complete redesign that’ll make it ‘better’ for heat pump systems.

"Better" but still not really good. 3rd party controls normally equal poor performance, with a heat pump, or a gas boiler 

@johnmo 

Thanks for all the replies.

Very interesting. My background is physics but this area is still quite novel to me.

I only wanted to use hive because (a) I already have all the kit and app,  (b) i wanted to access the system remotely - we're away soon for a fortnight - any ideas on how I should set the system? Turn it off?

The installers created two zones - a bit daft in a small 2 bed bungalow! But we have zone two as the two bedrooms. So we have two thermostats. Second one just around the corner from t'other!

We're still on octopus go until we install the battery, so cheap electric 0030-0530...

I've just done the following.

Dumped all thermostats except one is still there, but not really used as set to 23, but is there to give a remote on off signal to the heat pump should I need too.

I would wind up the thermostats you have, to 23-25 so they do not interfere with heat pump doing it's thing. Concentrate some time getting weather compensation curve set up. Start it at 25 flow or 20 if your heat can go that low a  temp at 20 degs outside, then at the other end whatever your installer says was the design temp for flow and outside temperature. Leave it to run. If the house starts to get warmer as temperature drops lower the design end of the curve a couple of degrees at a time.

You really need modulating TRVs on the bedroom rads, so they keep flow going all the time and to the temp you want.

Keep an eye on electric usage so you know what's going on.

Going away I tend to leave everything running. Certainly with a heat pump switching on off often leads to big bills.