The new cast iron OWB oil-fired water boiler features a high-efficiency flame-retention oil burner, PSC motor, solenoid valve, and solid-state igniter, says the manufacturer. The boiler offers easy service capabilities through a swing-away door and convenient top-access clean-out cover. Other features include cast iron sections with built-in air separator, low draft loss, and an insulated heavy-gauge steel jacket, the company says.