In this troubleshooting situation, you have been called to a restaurant to check an older model ice machine that isn't working like it should.

Grocers are becoming more vigilant in keeping their refrigeration equipment as clean as possible.

Once restaurants started reopening, smart owners asked contractors to clean and sanitize ice machines before they were returned to service.

Customers are now more aware of their HVAC systems and the air it circulates.

This month’s troubleshooting situation involves an air-to-air, package unit heat pump that is approximately nine years old.

Designed to do their job without wavering, hydronic pumps do require maintenance to optimize their performance — even the maintenance-free ones.

Let’s look at how the density of refrigerant entering the compressor’s cylinders affects the mass flow rate of refrigerant through the compressor.

When working on a refrigeration system, technicians may occasionally come across one where the type of refrigerant is unknown.

With two airside measurements and a little math, you can test and even adjust an outside air duct in a few minutes.

Coil cleaning. Glamorous? Hardly. Worth it for system performance? Absolutely.