Meet Ray™, the first condensing cast iron low mass boiler engineered and built for the American home. Its performance allows contractors, architects, and homeowners to live the good life—for a good long time. Fully Modulating at 47,000 to 200,000 BTU  at    93 % efficiency . 

Cast Iron + Condensing

Nothing lasts longer, holds heat better, or is more resistant to damage than cast iron. The Ray cast iron heat exchanger is built for a lifetime of low maintenance. This resilience allows it to fully recover the latent heat produced by the condensing process while standing up to its inherent corrosive effects.

Down Fired + Low Mass

The top-mounted burner directs flue gases counter to water flow. This maximizes efficiency and condensing performance in the cast iron exchanger. The lower mass of the internal water content means faster recovery of temperature and less heat loss between cycles—doubly so with cast iron.

Simple Digital Control: With a bright screen with large characters and plain-English descriptions (not codes or colored lights), Ray’s control interface simplifies system setup and diagnosis. One onboard controller can network up to 16 individual units.

No Fuel Conversion Kit: The symmetric air-to-fuel coupled burner not only adjusts automatically to altitude, it adjusts for either propane or natural gas with the turn of a single screw. No complicated adjustments, calculations, or extra parts.

Direct Spark Ignition: Choosing direct spark versus hot surface ignition is just one of many commercial-strength components engineered into Ray specifically for the condensing environment. No premature or unexpected vignition failure.

System Pump/Zone Valve: With commercial-strength componentry that accommodates today’s variable speed pumps, Ray provides operational efficiency as well as easy integration with older systems that use zone valves and zone pumps.

Graphite Port Connectors: Water joints are sealed with graphite connectors, making ports impervious to contamination by water-borne corrosive substances. Graphite stands up to higher pressure than ordinary metal seals and requires no field preparation.

Steel Mesh Intake Filter: The easy-to-remove, easy-to-wash intake air filter takes out unwanted debris or contaminants before they enter the system. Its steel mesh construction won’t tear. No filter replacement costs for the homeowner, no callback problems for contractors.