Starting May 3, 2021, Ameristar A952V furnace models will include a new, optimized heat exchanger that is designed to reduce operating noise in both liquid propane (LP) and natural gas installations. The product bulletin below details the models that are phasing out as well as their replacements. Orders will be superseded to the new model as the units become available. Orders placed on models that are phasing out will be filled based on unit availability.