In this white paper, you will find some real-world definitions of many of the confusing terms thrown around in VFD manuals and technical articles.

The 2019 International Roundtable met at the Renaissance Orlando at Sea World on April 16-18 for its Annual Meeting.

Beginning July 3, 2019, the Department of Energy is requiring a maximum fan energy rating (FER) for furnace fans.

This product features multicolored Chroma LEDs that allow users to choose from 24 hues with the included wall control.

Let’s look at five hidden reasons HVAC systems might not keep up when the temperatures get hot, how to test for them, and potential repairs.

Superseding AMCA Publication 511-21, AMCA Publication 511-21 (Rev. 12-22) outlines technical procedures and the proper presentation of data for the certification of air-control devices through the AMCA Certified Ratings Program (CRP).

Frost on an evaporator coil will prevent the correct amount of airflow across the coil. Anytime the evaporator coil experiences reduced airflow across its face, there will be a reduced heat load on the coil.

Once considered a temporary solution, portable heating and cooling units continue to evolve as consumer demand calls for new units and new uses.

Unico Inc. announced it is making highly efficient EC motors standard for all blower models within its modular air handling units.

Here is the potential problem: A contractor quotes a customer on the compressor replacement, and he agrees to repair the cooler at the quoted price. Then, as the technician is completing the job — or even after he has finished replacing the compressor — he finds out there is another system problem.

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

Troubleshooting the high side of a refrigeration system will often give service technicians valuable information. That’s because what happens in the condenser is a direct reflection of what is happening in the rest of the refrigeration system.

Occasionally while servicing refrigeration equipment, technicians may come across a system utilizing a water-cooled condenser instead of an air-cooled condenser.

There are several reasons why the compressor discharge temperature of a refrigeration system can be high when the condensing temperature is not, and a checklist can help a technician figure out the root problem.

The higher the inlet water temperature, the more sensible heat must be removed from the water and the longer the freeze cycle. The latent heat removed causes the water to change state, thus producing ice.

In this puzzle, a restaurant manager complains that one of the ice machines in his high-volume establishment isn’t producing enough ice.

Don’t assume equipment capacity or conditions. Instead, do some digging and find the tables for the equipment you install and service.

In the end, it's about airflow control. Unless your solution involves airflow and pressure measurement, you're guessing whether the repair worked.

Here are three lessons I learned while setting out to improve my skills selling duct upgrades.

Many in our industry believe the duct material used in an installation determines how well the HVAC system moves air. The issue isn’t the material type, it’s how we install the product.

I hope you see the potential for this formula. It will make your life easier and help you predict changes to blower speed settings with more accuracy and reliability.

Volunteering a total of 244 hours of work, Arista’s employees put their skills and passion towards a great cause.

The industry touches our lives directly, and an HVACR-literate public would be a boon to it.

While hydronic systems have long been recognized for their energy-saving properties in HVAC and plumbing applications, designing an efficient hydronic system and narrowing down the necessary system components can be challenging.

With modern technology, HVAC contractors can leave paperwork behind, and instead share information in real-time.

The advent of smartphones has made life both simpler and more complicated for people around the world.

HVAC contractors can incorporate a variety of best practices to ensure fleet vehicles are kept running as much as possible.

HVAC software companies Bluon Inc. and Sera Systems Inc. intend to join forces, bringing a new level of modern productivity to the HVAC industry from OEM to distributor to contractor to technician and all the way to the consumer.

This product combines field leak detection reliability with cloud hunting mode, which helps the operator to find the area highest in concentration and then switch to pinpoint mode to quickly find the leak.

When installing or repairing a refrigeration system, technicians should look for opportunities to slightly modify the system (without changing its design) to make it more serviceable.

Portable cooling products used to be considered “temporary” solutions, but consumers are now looking to portables to solve more of their residential and commercial needs.

Portable cooling systems work well as temporary solutions and can also serve as long-term options for unconditioned spaces like factories and warehouses.

The Endeavor Line provides tech-savvy and environmentally mindful consumers like the Horwitzes with smart home compatibility and sustainable features.

Increased cooling capacities, remote monitoring technology, and the need for backup units are all part of the mix in the portable a/c market, experts say.

How does a tech know the a/c compressor he or she is diagnosing is actually failed and that the problem is not a crankcase heater, condenser fan, or rubbed out wire?

The Fieldpiece booth commanded a lot of attention on the show floor at this year’s AHR Expo in Atlanta. Those who didn’t have time to wait in line to find out why may be wondering, “What was all the rage about?”

Now available with Bluetooth, this product provides users full access to all features of their devices, such as apps and email.

Through the new integration, ecobee thermostat owners who also own Generac home standby generators can easily see the status of the generator and remedy potential issues.

Motivated both by rising energy costs and sustainability concerns related to climate change, consumers have grown more desirous of energy-efficient living.

HVAC manufacturers share their latest heating products — including photos, specifications, warranty info, and more — in this detailed showcase.

AHRI launched an interactive US map showing state codes for A2L refrigerants, alongside a video series on low-GWP refrigerant transition.

Different areas have particular needs and also embrace new technology at different speeds.

Once only found in mild climates, the technology now stretches across the U.S., thanks to advances in inverter technology and zone controls. On the other hand, the level of sophistication in these systems sometimes makes them difficult to troubleshoot when something goes wrong.

An HVAC solution was the headliner for an event on Feb. 19 at a 121-year-old building in the nation’s capital named after one of America’s greatest composer-musicians. The event at Duke Ellington School of the Arts demonstrated how stepping beyond traditional non-inverter HVAC systems can preserve a building’s historical architecture, enhance energy efficiencies, minimize noise, and earn design-award accolades.

With over 1,000 Sunday service attendees and many church activities throughout the week, energy efficiency for the sake of cost savings was critical.

Both commercial facilities and residential domiciles are taking advantage of heating and cooling technology at accelerated rates.

As HVACR technology advances, contractors often find themselves navigating new learning curves on a regular basis. VRF is no exception.

The equipment in this month’s troubleshooting situation is a split system that has only been in service for two years, but there is a lot of history.

The EEV is often used in modern refrigeration systems, but troubleshooting its common failures may be complicated.

Troubleshooting refrigeration systems can be complex and frustrating, so put aside any assumptions and inspect the system thoroughly before making any diagnosis.