Sun2Solar XD1 Style Solar Powered Add-On Heater for Above-Ground Swimming Pools with Hoses CUTS THE CHILL: The use of this ecologically friendly above-ground pool heater will add degrees to the water temperature while removing the shivers. The single add-on unit heats most efficiently on pools measuring up to 8,500 gallons. Help retain the heat generated through use of a solar cover when not swimming. SOLAR POWERED: Go green with free energy from the sun. The coiled hoses within the domed cover are designed to warm up the water as it passes through your filtration system. Let the warm UV rays do all the work while you get to relax. SIMPLE TO INSTALL: Place on the ground near your pump where the most sunshine throughout the day is found. The Sun2Solar XD1 Solar Powered Heater requires no gas or electricity to function. This item measuring 22.8 x 22.8 x 9.84 should NOT be mounted on roofs. INTEX OR STEEL WALL POOL FRIENDLY: Adapters and connections are provided allowing this domed heater to be put into use quickly. Fits 1 1/4" to 1 1/2" flexible hose fittings. Includes two sections of hose along, stainless steel hose clamps and a protective cover. PUMP POWER MATTERS: This single add-on unit is designed for swimming pool pumps measuring less than 1 HP. For stronger pumps, a Bypass Kit is necessary as the water pressure will adversely impact the coiled hoses causing leaks.