The days of only being able to choose from large traditional solar pool heaters are long gone. It’s designed to extend your pool season by gradually increasing the water temperature by a few degrees. The unique threaded ports have been added for versatile plumbing options. Features: This innovative heater utilizes a dome design with curling connector tubes to extend your swimming season in the most cost-effective, eco-friendly way possible Environmentally-friendly heating energy Dramatically reduces or eliminates pool heating costs compared with gas or electrical heater Able to connect multiple heaters together Pool pump or filtration flow rate should not be higher than 10,000 liters/hr Dimensions: 11.25"H x 23"W x 23"D Material(s): plastic/metal