In one of its sections on TXVs, the book points out that “this component is widely used for nearly all types of air conditioning and refrigeration systems. The advantage of the TXV is its ability to automatically adjust to match the load, as it is designed to sense changes in the refrigeration load and respond to them.”

If a condenser coil is dirty or fouled, its ability to reject heat is severely affected.

HFCs were created to take the place of HCFCs, but they, too, are being targeted for a phasedown and are likely to be replaced by HFO blends.

From boilers to rooftop units to VRF systems, each technology offers a unique set of benefits sure to keep commercial customers — and their tenants — happy.

Some are calling for the Uber dynamic pricing model to be used in the HVACR contracting world, especially during peak times like summer, when demand for technicians often outstrips supply.

You don’t have to reinvent the wheel. — At some point, you’ve heard, or perhaps said, this phrase. — However, reinventing the wheel may be an ironic cliché, as it’s not clear when the wheel was actually invented. Internet citations suggest the wheel was first crafted in Slovenia more than 5,100 years ago.

I created this service call to help technicians understand flooded unit repair. Dedicated to technicians after Hurricane Harvey and Hurricane Irma — I hope it helps. Good luck.

Refrigeration service technicians often run service calls in which they find a compressor with a higher-than-normal suction pressure along with a lower-than-normal head pressure. Many times, the refrigeration equipment is still running, but the product temperature is too warm, which causes product quality and safety to suffer.

An iced evaporator is a common problem encountered by technicians servicing medium-temperature refrigeration systems. A visual inspection of the coil will show this obvious problem. Most technicians will install their low-side service gauge, find the running pressure to be lower than normal, and conclude the system has a low refrigerant charge. However, an iced evaporator can be caused by a totally different system issue.