Most hydronic heating systems that have renewable energy heat sources, such as solar thermal collectors, an air-to-water or geothermal heat pump or a biomass boiler also have an auxiliary heat source.
The proposed updated standards address deficiencies identified by the U.S. Court of Appeals for the D.C. Circuit and align them with requirements in the Clean Air Act.
Contingent upon regulatory permits and approvals, Navien’s current plans are to expand the existing facility starting in 2023, which will triple the footprint to nearly 900,000 square feet by 2026.