considering the mass of a home, what’s the efficiency difference between letting the temperature stay in uncontrolled for 8+ hours and then trying to rein it in quickly vs just keeping it in place the whole time? remember to account for wear and tear on the relevant HVAC equipment.
gruez|2 years ago
The energy lost from your home to the environment is dependent on the temperature difference. A warmer house (during the summer) loses less energy than a house that's cooled the entire time. Therefore at least from a pure energy use perspective, it's always cheaper to only turn on the system when you actually need it (ie. when you get home) than trying to maintain the same temperature.
>remember to account for wear and tear on the relevant HVAC equipment.
Without an accurate wear/tear model of HVAC equipment this can easily go either way. You could argue that having the equipment run for longer cycles shortens life because it has to work "harder", but you could also argue the opposite because most of the wear originates from the system starting/stopping and/or thermal stress from it being on/off.