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Home » Authors » Miles Ryan P.E.

Articles by Miles Ryan P.E.

Manual drain valve

Using MAU Cooling Coils as Dry Coolers, Part III

Three-part makeup air unit case study saga offers valuable lessons
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Miles Ryan P.E.
August 13, 2024

This is the third and final installment in the series on using makeup air unit (MAU) cooling coils as dry coolers.


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cx-author-WebImage.jpg

Using MAU Cooling Coils as Dry Coolers

Part 2 of a three-part series
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Miles Ryan P.E.
July 10, 2024

Using chilled-water cooling coils within makeup air units (MAUs) as dry coolers offers enhanced operational stability even in lower ambient temperatures. Explore real-world case studies, where smart sequence modifications optimized performance.


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cx-author-WebImage.jpg

Using MAU cooling coils as dry coolers, Part 1

Cooling coil placement presents opportunity
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Miles Ryan P.E.
June 5, 2024

This is the first of three articles on the application of MAU cooling coils as dry coolers.


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The trouble with troubleshooting during new construction commissioning

Learn to walk the tightrope between the pros and cons
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Miles Ryan P.E.
April 18, 2024

Treading lightly with your involvement in troubleshooting in new construction commissioning is necessary to avoid busting your budget or having others shift their responsibility onto you.


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Commissioning conversations: Addressing cringeworthy resistance to problem-solving

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Miles Ryan P.E.
April 15, 2024

Ideally, recommendations for addressing complex issues will prompt healthy collaboration between team members who all keep an open mind and remain committed to doing the right thing for the building.



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Identifying when HVAC modulation is hindered

Avoid poor performance, energy waste, and premature equipment failure
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Miles Ryan P.E.
March 4, 2024
Simplified schematic of the DHW system.

The case for softening DHW systems

A standard recommendation when hard water is present
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Miles Ryan P.E.
February 21, 2024

Recommendations from commissioning providers to owners, designers, contractors, etc., are often validated by field experience.


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Excessive scale buildup on an isolation valve that had been partially closed for balancing purposes.

Identifying back-feed potential of DHW risers

Commissioning efforts focus on the installation and operation of water heaters and recirc pumps
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Miles Ryan P.E.
January 8, 2024

More effort and money are spent on making those new condos look pretty than on making the building systems function correctly.




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Figure 1: Critical space diagram.

Adding resiliency to pressure control of critical spaces

How can we make our HVAC systems "bend," so they don't break, when something goes wrong?
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Miles Ryan P.E.
January 2, 2024

Resiliency has been a buzzword for the past few years in the U.S. Air Force. It's the ability to bend, but not break, when something goes wrong.


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Appropriate range for minimum outdoor airflow set point reset in DCV

The awkward conversation about DCV

Challenging the Big Mistake
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Miles Ryan P.E.
November 28, 2023

I've found if your recommendation includes challenging the Big Mistake often seen with a demand-controlled ventilation (DCV) sequence for air-handing units (AHUs), you better be prepared for some unexpected arguments.


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