One of the highest energy costs in your home comes from running your HVAC system. One myth about saving energy with your heat or AC is that setting it to an extremely high or low temperature will help the system work more efficiently. However, this is one of the worst things you can do in terms of saving energy. Your system will not reach a certain temperature any faster if you set it for a number beyond that. In truth, changing the temperature frequently causes your system to work less efficiently. Instead, choose a temperature that you are able to tolerate well and stick with it. Investing in a smart or programmable thermostat is a great way to save even more, since this ensures the temperature is comfortable when you’re at home but the system isn’t running too hard when no one is there.