I hardly remember to change the air filter, however our current programmable control device tells myself and others when it is time. I bought the programmable control device this weekend, when our ancient digital device stopped working. All of the numbers disappeared as well as I thought it was time to change the batteries. When I put a fresh set of batteries in the control unit, I still had no digital display. I looked up the complicationshooting information online as well as everyone said it was time to replace the control unit. I want to the hardware store with a friend of mine, as well as the people I was with and I evaluated out the wide selection of temperature control devices. The sales person tried to get myself and others to buy a wireless control unit, however I did not think that was a nice option! Sometimes the internet can be spotty in our neck of the woods. I would dislike to have no control over the temperature if the internet is out. Instead, I decided to go with a programmable control unit. It has a lot of the same features as the wireless control unit, however it works without being hooked up to the Internet. The programmable control device has multiple odd settings, so I can set the temperatures differently throughout the morning. Another great feature on the programmable control device is the notifications. When our air filter needs to be changed, there is a small beeping notification on the control unit. It’s truly aggravating as well as will not stop until I reset the unit or change the air filter. I think it’s a great way to remind every homeowner that it’s time to perform the monthly service.