Weil-McLain Aqua Plus 45 Indirect-Fired Water Heater (Series 2)

The Weil-McLain Aqua Plus 45 Indirect-Fired Water Heater (Series 2) is a high-performance system component engineered to deliver premium domestic hot water efficiency and reliability. Built with a heavy-duty 316L stainless steel tank and high-output internal coil design, this unit provides exceptional durability and outstanding resistance to demanding, aggressive water environments. Its low-maintenance, high-performance architecture eliminates the need for a sacrificial anode rod, making it an ideal solution for residential and light commercial hydronic heating loops.

Operating seamlessly as an independent zone connected directly to your primary heating boiler, the Aqua Plus 45 generates ultra-fast recovery times and continuous hot water delivery by utilizing a tightly wound 1-inch diameter heat exchanger coil. The tank features a high-density, 2-inch thick CFC-free foam insulation jacket that reduces standby heat losses down to an exceptional 0.4°F per hour, maximizing overall fuel conservation. Encased in a resilient, dent-resistant pewter gray polymer resin outer shell, this indirect water heater provides long-lasting mechanical protection and reliable domestic thermal staging.