Pool Heating (large scale): The cost of heating a commercial pool—whether public or private—can be a significant portion of its operating budget. This is because heating large volumes of water requires massive amounts of energy, whether gas or electric and its associated environmental impact. Many commercial pools require certain minimum temperatures and in recent years have exceeded budgeted heating costs. With higher energy prices in recent years, pools are reducing their swim season, or just not using the heating system to reduce expenses. Commercial solar pool heating systems are relatively simple, inexpensive and highly reliable. A solar pool heating system offers one of the fastest return-on-investment (ROI) and payback times of any installed commercial solar energy system.