DESC: SunGrabber Solar Pool HeaterSunGrabber has been designed to heat your above ground poolwith the best technology in the industry:Available in 2 - 2 x 20 pre-plumbed panels (hoses/clamps soldseparately by your dealer)Disc UnitHeats a 16'-24' Round PoolIncreases your pool water temperature up to 10 degreesMost efficient solar panel in the industry - producing over80,000 BTUs a dayCompatible with your existing pool pump10 year prorated warrantyBetter than a gas heater - no gas line, no gas bills, nopollutionMade in the USA for quality you can count on Recommend number of AGP SunGrabber systemsbased on pool size:Pool Size# systems (two 2x20 panels)16 round 120 round 124 round 128 round 212x24 oval 115x24 oval 116x26 oval 216x32 oval 218x34 oval 220x40 oval 3We would suggest that you start with two2x20 solar panel for your above groundpool if your pool is 27 round or smaller.You can always add another solar panel ifyou would like to get more heat from yoursystem. Adding another panel is easy,