Add weeks to the swimming season with no additional energy costs. The SolarPRO XB2 Pool Heater uses the sun's energy to warm the water in your economy-size pool for comfortable swimming conditions after others have closed up shop for the fall. Easy-to-install heater covers about 10 square feet and works with ½hp or smaller filter systems. Clear cover improves efficiency and protects heater water channels. Folds compact for easy storage. Includes adapters for Intex® pools. Full-replacement, 90-day warranty. Dimensions: 3-1/4' L x 3/1/4' W x 3”H (filled).