The KNIGHT XL®, engineered with Lochinvar’s exclusive SMART SYSTEM™ control and an array of other innovative features, places it far ahead of any commercial heating boiler in its class. It promises and delivers ultimate ease of installation and maintenance. With up to 94% thermal efficiency, low-NOx emissions and a fully modulating burner, it is the best “green choice” for today’s environmentally focused market.

Five modulating/condensing stainless steel KNIGHT XL boilers are available with 399,000–800,000 Btu/hr inputs and remarkably small space-saving footprints. All are equipped for direct-vent installation with air intake and exhaust runs up to 100 feet using PVC, CPVC, Polypropylene or AL29-4C vent materials. This range of choices is ideal for light-duty applications such as small hotels, schools and office buildings. For higher-demand applications, up to eight KNIGHT XL units can be installed utilizing the built-in cascading sequencer to deliver up to 6.4 million Btu/hr heating capacity.

THE KNIGHT XL BOILER reflects Lochinvar’s constant commitment to providing all the options you need to serve every application.

  • – 5 models from 399,000 to 800,000btu/hr
  • – 94% thermal efficiency
  • – 5:1 turndown radio
  • – Stainless steel watertube heat exchanger