50, 75, 100, 150 and 200 MBH – All Dunkirk Helix VX capacities are 95% efficient and meet the criteria for Energy Star 2017 Most Efficient.
The Dunkirk Helix VX gas-fired, wall hung modulating condensing boiler is Energy Star 2017 Most Efficient. All capacities are 95% AFUE with a 5:1 turn down ratio. The VX features Dunkirk’s innovative 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 VX 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.