Watkins Manufacturing, producer of HotSpring portable spas, has saved enormous amounts of energy and water through upgrades and retrofits. During 2007 and 2008, Watkins saved over 1.3 million kWh, or $250,000, and reduced natural gas use by 156,000 therms. To achieve these savings, Watkins reduced their engine runtime, upgraded their lighting, A/C, and HVAC, installed vendor misers on all vending machines, and replaced old roofing with high-reflection Energy Star rated roofing. Watkins also saved over 1 million gallons of water through upgrades to water system controls.