The Sensaheat Heat Pump Interface is designed to operate your filtration system when filtration is called for by either the chlorinator or heater./ Heat Demand – As most pools filtration systems run for 8 hours a day, extra run times are often required to maintain the water at your desired temperature. The heat pump is equipped with a ‘Demand Heat” function that will assist in maintaining the temperature of the pool by communicating to the Sensaheat Heat Pump Interface. The Sensaheat Heat Pump Interface will over-ride the filtration system when heat is required from your Sensaheat heat pump, which monitors the temperature within its defined run times. By this mean, the user is sure the water is always ready for use, day or night.