Air,scource heat pumps

[Flyfisher]

I scored a rebadged 1.5m³ L&G T230 on ebay for the princely sum of £18. An MBus to USB converter from China coupled with some simple software allowed me to integrate it in to my Home Assistant system. You don't need to set up a computer to log the data as energy & volume can be read just by pressing a button - Just like reading your gas/electricity meters. But if you do record the data, you can produce graphs showing energy used throughout the day. e.g.:

I recently became a convert to Home Assistant and (among other things) have 'flooded' the house and heating system pipework with temperature sensors based on the ridiculously cheap ESP32-C-zero board (£3.50 at PiHut) and similarly cheap 3-wire temperature sensors. It can be integrated into Home Assistant using ESP Home Device Builder to give real-time readings and the sort of graphical history data you described.

Admittedly a very 'geeky' thing and something I wouldn't have mentioned if you hadn't brought it up, but it really does give a useful insight into what's really happening 'behind the scenes' and very helpful in my case where we have a mains gas boiler and a multifuel boiler stove integrated into a 'heat-store' type system and four heating zones including two UFH zones.