90+ Resolute is ideal for fin tube baseboard, cast iron radiators, air handlers, and unit heaters, complementing its exceptional performance with high efficiency and nearly endless hot water. Save on energy costs without cutting back on comfort!
Non-condensing boiler that sidewall vents or vents through your existing chimney without an expensive stainless steel liner.
The Department of Energy’s Brookhaven National Labs study demonstrates this design as the top performing system, saving up to 38% over boilers from around the world. The 90+ Resolute improves on the highest real efficiency of all systems tested, delivering even better peak and annual efficiency.
