It’s best not to keep shutting down your HVAC system when you’re away and turning it back on when you return. This habit will only strain your system and cost you money. Instead, let your HVAC system run at a low level to preserve its functions.
Ideally, you should set your thermostat at a higher temperature when you’re away. The setting should be around 31°C or as close to the outside temperature as possible. This will create a good balance such that your home won’t feel too hot or too cold when you return.
If you have a programmable thermostat, it’s best to set it such that it raises the temperature when you’re out and lowers it back when you arrive home.