We recently replaced our pool heater at Summit middle school with 98% efficient Sentry Pool Heaters. This system is operating above and beyond expectations. The pool runs at a more constant temperature and with the installation of the more fuel efficient pool heating equipment that is Energy Star rated we also received a rebate from our energy provider (MidAmerican Energy) in the amount of $8,151.00. The energy efficiency rebate alone paid for a good part of the pool heater project. The fuel efficiency of the new pool heating equipment will soon pay for the rest of the project. We are very happy with completed project.