Hello @ClareB! I'm part of the official support team for the Google Nest devices for Europe. My colleague Mark is part of the North American support team and his explanation is better suited for the device sold there, hence the confusion. The thermostat has been optimized in such a way to be as energy efficient as possible, but I understand that it may not be perfectly fit for every single person. If you want to set the thermostat to a certain temperature, it will call for heat until the target is reached and then will only start the boiler to maintain it, so even if it is an half an hour or an hour set point, the thermostat won't keep the boiler on if the target temperature is reached. As for the Hot Water, it also takes a while for the boiler to heat sufficient water and store it into the tank, and it is more efficient for the thermostat to call for hot water for half an hour, rather than do it multiple times for shorter periods. As I said this may not be exactly fitting to what you would prefer, and that's why I'll further your feedback, and you can rest assured that it will be taken into account. Thanks for the interest you've showed on this matter.
