Wohlfarth has more than 30 years of real-life experience inside boiler rooms and uses humor and jobsite stories to teach the class.

The HTP Elite XL is a powerful commercial boiler that is available in six sizes ranging from 400,000 Btu/h to 2,000,000 Btu/h.

The MACH® condensing boiler from Patterson-Kelley increases turndown, with emphasis on system efficiency, reliability and serviceability.

Pennant boilers and volume water heaters received a substantial upgrade with the Laars Linc intuitive control system with color touchscreen.

Weil-McLain’s Stainless Steel Vertical Firetube (SVF) commercial boiler features thermal efficiencies up to 97.1%.

Slant/Fin’s VGH Boiler offers the next generation duo stainless steel water tube heat exchanger featuring larger water passages increasing the heat output, the company says.

Raypak’s XVers commercial fire-tube boilers offer installation flexibility, easy commissioning, optimum seasonal efficiency and long-term reliability, the company notes.

AERCO’s Benchmark Platinum condensing boilers with the Edge Controller saves time and money on installation and operating costs, simplifies start-ups and maintenance and strengthens system efficiency and performance, the company notes.

Using an internal combustion natural gas engine, Lochinvar and EC Power’s Micro CHP (< 50 kW/hr) XRGI25 is designed to be an efficient, easy-to-install system intended for light commercial use.

Navien NFB series high-efficiency condensing fire tube boilers are available in two models, NFB-175 (175,000 Btu/h) and NFB-200 (199,900 Btu/h).