Preferred™ Series BW4 Boiler at Apex Air in Vancouver WA.

Preferred™ Series BW4 Boiler BW4

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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
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Easy no-obligation quotes.

Seasonal Service Plans

Worry-free HVAC care.

0% Interest Financing

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24/7 Emergency Service

Apex is here – anytime.

FREE Estimates

Easy no-obligation quotes.

Seasonal Service Plans

Worry-free HVAC care.

0% Interest Financing

Start your project.