The Utica SSV gas-fired, wall hung modulating condensing boiler is recognized as the Most Efficient of ENERGY STAR® 2019. All capacities are 95% AFUE with a 5:1 turn down ratio. The SSV features Utica’s original vertical, patent pending heat exchanger design. This low maintenance, self-cleaning heat exchanger was designed in the U.S. for the U.S. to withstand up to 150 psi MAWP. The SSV is approved for PVC, CPVC and Polypropylene venting and comes with a 15-year limited manufacturer’s warranty plus and industry-leading first year $500 heat exchanger labor warranty.