Technical Tips
New Efficiency Ratings (SEER2) – Getting it Wrong
Bottom Line: The US Department of Energy (DOE) has new efficiency standards (SEER2, EER2, HSPF2), effective January 1, 2023. Unfortunately, these […]
Hey Ed, What Can I Do if I Cannot Find the Filter’s Performance Data?
What should you do if you can’t find the filter’s performance data? Find out what to do and in this edition of “Hey Ed!”
We Win!!
NFPA will be exempting all outdoor HVAC from NEC GFCI protection until September 2026. Read what this means for the HVAC industry in this blog.
Hey Ed, Does It Matter Where I Take My Supply Air Measurements for Discharge Air Temperature or Relevant Humidity?
Should you take supply air measurements for discharge air temperature or relevant humidity? Learn how to get the best reading in this edition of “Hey Ed!”
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ACCA Member Ed Lehr Testifies for You!
At the most recent NFPA Standards Council, Ed Lehr represented ACCA while urging the Council to fix a bad code. Read more about this council at this blog.
Impending Electrification
Electrification and heat pumps are coming, and with them, many HVAC problems to look out for. Read this blog to learn more about heat pumps.
Hey Ed, Can I Estimate Latent Capacity Based on the Water Coming Out of the Drain?
Want to know how to estimate latent capacity based on water coming out of the drain? Find out how to calculate latent capacity in this edition of “Hey Ed!”
Hey Ed, Can I Use Different Outdoor Design Conditions if I Live in a Heat Island?
Should you use different outdoor design conditions if you live on a heat island? Find out how to utilize Manual J in this edition of “Hey Ed!”
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Indoor Coil Pressure Drop – “Where’s the Heat?”
Determining the proper pressure drop can be tricky. Ed Janowiak goes over the proper way to approach the pressure drop in this blog.
Hey Ed, Why Do I Have to Use the Indoor Design Condition 75 Degrees Fahrenheit at 50% Relative Humidity for Summer Cooling?
Why do I use the indoor design condition of 75 degrees at 50% relative humidity? Find the answer with Manual S and Manual J in this edition of “Hey Ed!”
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Ready to Prove It?
HVAC Professionals who check their work thoroughly provide an important value to customers. Read this blog to learn about ACCA’s Quality Assurance exams.
Hey Ed, What Is the Minimum Velocity in a Duct System?
Want to find the minimum velocity in a duct system? Find out how to use Manual D to find the minimum in this edition of “Hey Ed!”
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New Safety Standard for Residential A2L Refrigeration Systems
After years of development, a new safety standard from ASHRAE has been published. Read this members-only blog to learn all about the new safety standards.
Hey Ed, Is There a Way to Evaluate the System’s Refrigerant Charge Without Connecting My Gauges?
Want to evaluate a system’s refrigerant charge without connecting any gauges? Find out how to wet-bulb for evaluation in this edition of “Hey Ed!”
Hey Ed, What is Oil Slugging?
Want to know what Oil Slugging is? Find out about compressors and oil backflow in this edition of “Hey Ed!”
Hey Ed, What is Friction Rate?
What exactly is friction rate? Learn where to find the calculation rate in this edition of “Hey Ed!”
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A Quick Reference to Reversing Valve Troubleshooting
The reversing valve is responsible for moving temperatures around. Read this blog to learn how to efficiently troubleshoot your reversing valve.
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The Right Filter – Don’t Guess at Pressure Drop
Finding the correct pressure drop is often made up rather than looked up. Ed Janowiak explains this issue and offers a solution in this blog.
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Working in the Heat Safely
In the summer, working outside can pose a serious threat. Read this blog to learn how to stay safe and cool when working outside during the summer.
