We highly recommend the Hive Home setup. We’ve used this now in our apartments and our own home now for over 2 years and the savings in our power and gas consumption are considerable. You can read more about this here.
The main products we recommend are:
The Hive Outdoor Camera is an excellent tool to see who is coming to your home to collect keys, for example. This notifies us whenever anyone comes to our door (our main key collection point) or our apartments, and helps ensure that only the people who’ve booked with us are the people staying.
This really is an awesome choice for managing your heating. It means that if we know the apartments are not occupied, we can remotely turn the heating off. We can also turn it off in situations where, for example, the clean has been done but we know the guest won’t check-in until 6pm. This is an excellent money saver.