Product Description Eco smart Pool Heaters operate by utilizing the latest flow sensor technology instead of the traditional pressure switch activation to reduce the risk of burned elements, which increases its reliability and longevity. The Smart POOL series comes with digital thermostat control so you can set the temperature exactly where you want it. From the Manufacturer Ecosmart Pool Heaters operate by utilizing the latest flow sensor technology instead of the traditional pressure switch activation to reduce the risk of burned elements, which increases its reliability and longevity. The Smart POOL series comes with digital thermostat control so you can set the temperature exactly where you want it.