The Air-Conditioning, Heating & Refrigeration Institute will hold three free seminars at the AHR Expo, Jan. 22-24 in Chicago.

No advance registration is necessary. All seminars will be held at McCormick Place.

Benefits of Flexible Gas Piping Systems for Commercial Applications

Jan. 23, 2-3 p.m.

Presenters will explain how corrugated stainless steel tubing provides efficiencies in cost, installation time, rough-in space, and weight. Its flexibility offers safety advantages in areas of seismic activity and high-rise construction, and works well in system upgrades and electric to gas conversions.

Best Practices for Humidification Systems

Jan. 23, 3-4 p.m.

Learn why humidity control is important, and details on steam system and adiabatic system design. The presenters also will discuss special applications for humidification, such as healthcare and cooling.

Utilizing Variable Frequency Drives

Jan. 23, 4-5 p.m.

Learn about the benefits of variable frequency drives , and how AHRI Standards 1210/1211 are used to rate and test VFDs. This session will also include an overview of the AHRI VFD certification program and how to use VFD certified ratings.