M5M Watertube Boiler — Steam and Hot Water

R.F. MacDonald Co. services and sells boilers, pumps, composites and accessories for commercial and industrial applications.

CB Boiler Model M5M

CB Boiler Model M5M

CB Boiler Model M5MDesigned for steam applications up to 500 psig, hydronic comfort heating to 180°F or process water temperature to 410°F, this watertube boiler delivers big in a compact design, yet does not consume extra real estate.

• Steam or hot water
• 2,000 to 6,000 MBTU/hr
• Steam to 500 psig
• Achieves <20 ppm NOx and <10 ppm CO
• Premix burner technology
• Integral burner for maximum efficiency
• Increases boiler room floor space by 50%

Product Overview

Whether your application is a small batch load for food processing, or you are considering a hybrid heating system, the M5M provides an environmental solution to meet today’s energy and emissions standards. Equipped with a premix surface combustion burner, the M5M is environmentally friendly out of the box.


• Linkageless control automatically adjusts the air/gas mixture
• Maintains peak operating efficiency during low system demand