Crown Boiler’s stainless-steel, condensing Phantom boiler fires at AFUEs up to 94% and features a water tube heat exchanger. It is offered in five sizes — 80, 100, 120, 150 and 180 mbh — with four more sizes (210, 285, 399 and 500 mbh) set to be available this fall. stainless-steel, condensing boiler

It features a compact design for wall-mount installation; a touch-screen user interface; a modulating burner with a 5-to-1 turndown ratio; and an intelligent boiler control. The standard outdoor reset function allows the boiler to adapt proportionately to outdoor temperature changes.