PurePro AO-3E Advantage Three-Section ECM Oil-Fired Water Boiler

The AO‑3E is a compact, high‑efficiency three‑section cast‑iron oil-fired water boiler designed for reliable hydronic heating in residential applications. Equipped with an ECM circulator and a factory‑installed burner, it delivers strong performance with reduced electrical consumption and smooth, quiet operation. This oil-fired water boiler is built for chimney venting and comes less tankless coil, making it ideal for homes using an indirect water heater or dedicated hot‑water system.

Key Features
Three‑section cast‑iron heat exchanger engineered for even heat transfer, long service life, and stable operating temperatures.

ECM circulator that lowers electrical usage while improving system efficiency and comfort.

Factory‑installed oil burner (Beckett, Carlin, or Riello depending on configuration) tuned for clean, consistent combustion.

Chimney‑vented design for straightforward replacement of older atmospheric oil boilers.

Less tankless coil configuration, ideal for pairing with an indirect water heater for higher domestic hot‑water output and efficiency.

Quiet, low‑vibration operation supported by the Advantage series’ combustion and airflow design.

Service‑friendly layout with accessible components and clean wiring for easier annual maintenance.

We service and install all types of HVAC heating and cooling equipment throughout Long Island, including (but not limited to):

Nassau County: Oyster Bay, Hempstead, North Hempstead, Glen Cove, Long Beach, Freeport, Valley Stream, Garden City, Great Neck, Mineola, Hicksville, Levittown, Massapequa, Bethpage, Plainview, Syosset, Jericho, Westbury, Rockville Centre, Farmingdale

Suffolk County: Huntington, Babylon, Islip, Smithtown, Brookhaven, Riverhead, Shelter Island, Southold, Southampton, East Hampton, Commack, Deer Park, Lindenhurst, Bay Shore, Brentwood, Central Islip, Hauppauge, Centereach, Selden, Medford, Patchogue, Shirley

Contact us today at (631) 779-3196