HeatsavrTM is a liquid pool blanket that forms an invisible layer on the surface of pool water. It reduces evaporation and heat loss, saving energy and lowering costs. Independent trials found it is completely safe, does not affect water chemistry, and can save facilities 10-40% annually on fuel, water, and maintenance costs. A 2014 case study measured a 21.7% reduction in gas usage and £4500 savings with a return on investment of over 150%.