A high‑capacity five‑section cast‑iron oil‑fired water boiler engineered for strong hydronic output, long service life, and efficient system performance. The AO‑5E features an ECM circulator for reduced electrical consumption and smoother, quieter water circulation. This packaged configuration includes a factory‑installed oil burner and is supplied less tankless coil, making it ideal for systems using an indirect water heater or a standalone domestic‑hot‑water solution. Designed for chimney venting, it serves as a straightforward replacement for older atmospheric oil boilers in larger homes.
Key Features
Five‑section cast‑iron heat exchanger delivering high output, thermal stability, and long‑term durability.
ECM circulator reducing electrical usage while providing quiet, consistent water flow.
Factory‑installed oil burner (Beckett, Carlin, or Riello depending on configuration) matched to the boiler’s firing rate for clean, stable combustion.
Less tankless coil configuration optimized for pairing with indirect water heaters or separate DHW systems.
Chimney‑vented design ideal for retrofit installations using existing flue systems.
Quiet, low‑vibration operation supported by the Advantage series’ combustion and airflow design.
Service‑friendly layout with accessible burner, controls, and piping connections.
Ideal Applications
Larger homes needing a high‑capacity oil boiler for hydronic heating, paired with an indirect water heater or standalone DHW system, and using existing chimney venting.
