Hi Louise,
I can also recommend the Nest thermostats, I have one of them at home and they are controllable from your phone via wi-fi, so you can adjust the heat from anywhere in the world.
At our holiday let we have a hot tub, which guests frequently forget to replace the lid when they get out for the evening. I have now fitted a BWA Spa wi-fi unit to that too and I warn the guests that if they leave the lid open that the hot tub will send me an alarm and it will go into 'rest' mode and will be cold in the morning, it doesn't - I keep an eye on the temperature after 10:30pm and turn it down if they have obviously left it uncovered!
Fortunately we installed a biomass boiler some years ago, under the renewable heat incentive scheme, so until very recently we've not had to worry too much about the heating / hot water bills, but the was in Ukraine has meant that the price of wood pellets has gone up by 350% since March!.
Has anyone that applied for the Airbnb’s Sustainable Hosting Plan grant heard anything recently? I had an e-mail back from the Energy Saving Trust back on the 8th November saying they were considering my fast track application (as we already had a quote for an EV charger, a 5kw solar array and a Tesla Powerwall), but have heard nothing since.
Good luck,
Adam