Weil-McLain 386701000 Steam Oil-Fired Boiler Gold S4 85% 133K w/ Burner

A reliable three‑section cast‑iron steam oil-fired boiler engineered for stable steam production, long service life, and clean, efficient oil combustion. Built on the proven Weil‑McLain Gold S4 platform, the 386701000 oil-fired boiler arrives as a factory‑packaged unit with burner installed, ensuring proper alignment, consistent ignition, and reduced installation time. Designed for natural‑draft chimney venting, it is an ideal replacement for older atmospheric steam boilers in residential one‑pipe or two‑pipe systems.

Key Features
Three‑section cast‑iron heat exchanger designed specifically for steam generation, delivering dry steam and stable system pressure.

133,000 BTU heating capacity suitable for medium‑sized homes with steam radiators or steam baseboard.

Factory‑installed oil burner matched to the boiler’s firing rate for clean, reliable combustion.

85% AFUE efficiency providing strong performance with straightforward annual maintenance.

Natural‑draft chimney venting for easy retrofit into existing flue systems.

Quiet, low‑vibration operation supported by Weil‑McLain’s combustion chamber and block design.

Service‑friendly layout with accessible burner, controls, and steam trim.

Ideal Applications
Homes with one‑pipe or two‑pipe steam systems needing a dependable, mid‑capacity oil‑fired steam boiler with a factory‑matched burner and natural‑draft venting.

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

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