We've been pretty spoiled in residential and light commercial in the USA because we haven't needed to deal with glide much. R22 has no glide, and R410a is a near-azeotropic blend, which means it has almost no glide. The days of being able to ignore glide are coming to an end. Carrier has announced their […]

There is so much to consider on any sort of design project, and HVAC system design is no exception. Unfortunately, the priorities of engineers, builders, customers, and HVAC contractors don’t always align when it comes to designing and installing the “ideal” HVAC system. On the one hand, the customers may prioritize aesthetics; they don’t want […]

I don't do much in the way of “rack” refrigeration. However, I recently had a conversation with experienced rack refrigeration tech Jeremy Smith, and he got me thinking about EPR valves. I've heard EPR (evaporator pressure regulator) valves called suction regulators or hold back valves. In essence, they hold back against the suction line to […]