The Polaris High Efficiency Condensing Gas Water Heater is available in 34- and 50-gallon models. The product operates at a thermal efficiency of up to 96 percent through an ultra-low NOx modulating gas burner that ensures operation at lower input rates. Compatible with both natural gas and propane, the product features a power direct vent design that fits with PVC, CPVC or polypropylene through a sidewall or roof. Additionally, two front-access panels give contractors access to all serviceable components. The electronic controls touchscreen display give homeowners temperature control and water heater diagnostic. It also has a 10-year limited tank warranty. A.O. Smith. www.hotwater.com