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ACSYS thermostats are . They’ll get the job done if you need a basic programmable thermostat on a tight budget. However, for not much more money, you can get a Honeywell or a used smart thermostat that offers far better convenience and energy savings. If your home has a simple HVAC system and you don’t care about app control, ACSYS is fine. Otherwise, spend a little extra for a more modern device. Tip: Always check your system’s compatibility (C-wire required for some models) before buying.