A user interface for climate control. The purpose is to save energy by bringing in fresh air at times when the outdoor air temperature is more desirable than the indoor temperature. Primarily the user chooses their own savings; during the hot seasons energy is saved by cooling the location cooler than the desired temperature; the greater the parameter chosen the greater the efficiency. If the desired inside temp is 70 and the night time low is 50 and you accept that then the location will cool to the lowest temperature you allow causing your air conditioner to come on much later in the day; if at all depending on parameters set. It works the same way in cold seasons, only in reverse. allowing you to freshen your indoor air. The interface can be set up to operate all air handling systems, exhaust fans, intake fans, furnaces air conditioners, ERV's etc.