Making your home more energy efficient by upgrading your air conditioners and furnaces, sealing the ductwork and air gaps, installing shade screens, and more efficient pool pumps, has never been easier with the National Bank Green Returns Financing! For APS customers, financing rates are set at a fixed 4.99% rate, and at a 5.99% fixed financing rate for SRP customers. From time to time, the rates will vary, so keep checking for updates on the latest rates!