Modern models pay for themselves very quickly.
Top Reasons to Install a Programmable Thermostat
Programmable thermostats are a low-cost investment with a fast pay-back. Estimates for how much they save vary, but hover around 10% of annual utility bills!
Our lungs weren't made for warm, dry air 24/7. Sleeping in cooler air in winter eases allergy symptoms and leaves eyes and skin less dry.
You don't have to worry about getting up to a cold house on winter mornings. Just program the thermostat for your wake-up time and wake to a warm house.
Most models allow for three standing schedules (Monday-Friday, Saturday and Sunday); some let you set a different schedule for each day of the week. You can set it to adjust the temperature while you're at work or school, on vacation or away for more than two hours.
"Smart programmable thermostats" cost more, but can be adjusted from a smart phone. Need to stay late at work? Can't recall whether you set the thermostat back before leaving for a weekend get-away? No problem: Use its app to adjust it.
Learn more from Energy Star here.
How to Program Your Thermostat
Find your thermostat's instruction booklet.
Can't find it? Just do an internet search for "[your thermostat's manufacturer] [its model number] instructions." (Save it as a PDF file on your computer for future reference.)
Note that manufacturers often use the same booklet for more than one product; be sure to follow the instructions for your model. If you don't see the model number on the outside of the thermostat, carefully open its cover to find it. Then, follow the "set-up" instructions.