You can save by reducing AC use

Sweltering Florida heat makes it a difficult choice

If you’re gone from home a lot, a programmable thermostat provide comfort and save you money. Photo by R. Wayne

With the heat index at 100 degrees or higher in many parts of the country, you might be adjusting your thermostat to save money. But some people, and a few experts, say you shouldn’t change it too frequently or by too much.