Top of its Class for Performance

The Onex series of condensing boilers utilize a patented tri-parallel flow heat exchanger and state of the art premix air/gas modulation firing system for optimal combustion. Onex series boilers have AFUE ratings of 91% and come in a convenient space saving wall-hung design. Units are offered in both “combi” and “heat only” configurations.

“Combi” units provide both hydronic heat and semi-instantaneous hot water all in one complete compact package. “Combi” units include as standard features a mounted and wired system circulator pump and expansion tank.

“Heat only” units are offered with no integral domestic hot water package allowing customers the use of their current hot water supply equipment. “Heat only” models can be easily piped to an indirect-fired storage tank for additional storage capacity.

All units utilize a panel mounted “on-board” electronic control platform that allows for easy set-up and custom system configuration.

Onex series units are installation and maintenance friendly. All fuel and water utility connections are conveniently located at the bottom of the unit, external to the cabinet for ease of connection and service.

The Onex is at the top of its class for performance and safety.

Standard Features

("Combi & Heat only" units)

  • 91.1% AFUE
  • ASME heat exchanger
  • Patented tri-parallel flow stainless steel tubes
  • Premix burner technology
  • Full 5:1 modulation (30,000 – 160,000 btuh)
  • Environmentally friendly – low NOx – less than 15 ppm
  • Space saving wall mount
  • Easily converted from natural to L.P. gas
  • Outdoor air sensor

Standard Features

("Combi only")

  • Semi-instantaneous domestic hot water coil (4 GPM)
  • Integral system circulator pump
  • Integral expansion tank and air vent