Preferred™ Series BW4 Boiler BW4


Engineered for efficiency and built cast-iron tough, this boiler is one of our most advanced oil-fueled radiant heat systems. It delivers quiet, even, draft-free warmth and an AFUE rating of up to 86.5% for unbeatable energy savings.

AFUE Efficiency: Up to 86.5%
  • Oil fuel
  • Up to 86.5% AFUE
  • Sectional cast-iron design
  • Cast-iron heat exchanger Small compact design
  • Swing burner door
  • 5-year parts limited warranty and a 20-year parts limited warranty on heat exchanger section