As the upgrade to our highly successful Envision Series, the 5 Series represents some of our best features and efficiencies yet. The 500A11 provides forced air heating, air conditioning, and even generates a portion of your home’s hot water – all from a single unit that offers a level of comfort and savings that’s far greater than any ordinary system. Available in many sizes and configurations, the 500A11 provides exceptional performance, versatility, and quiet operation. All 5 Series products utilize environmentally friendly R-410A refrigerant and the best in system components, including all-the next generation of WaterFurnace controls – Aurora. Aurora controls provide two-way communication between components for the ultimate in performance and troubleshooting capabilities. 500A11 units also feature an all aluminum air coil for durability and extended system life. The 5 Series upholds the standards we’ve set over three decades and the trust associated with the WaterFurnace name. Every unit is computer run-tested to ensure flawless performance at start-up – and in the unlikely event of a malfunction, they’re backed by the best warranties in the industry. Choose a geothermal system that’s Smarter from the Ground Up.