Check out these Tips for Setting Your Thermostat for Vacation from Mike’s Heating & Cooling! Great info, including one big tip for how much higher to set your thermostat: 5 degrees higher than you normally set it.
So if you keep it at 70 degrees, move it to 75 while you’re on vacation! Why? You’ll save money AND prevent mold and mildew, which can start growing if your house gets hotter than 90 degrees. Read more on their blog: https://mikesheatcool.wordpress.com/