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Articles by Rebecca Thatcher Ellis, P.E.

COMMISSIONING

Commissioning Action Lists: Keeping Them Under Control, Part 3

Don’t let this trio of developments throw you off your game.
I will close out 2014 with this final column about how to avoid excessively long commissioning action lists (CALs).
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COMMISSIONING

Commissioning Action Lists: Keeping Them Under Control, Part 2

Some coordinated drudgery up front will prevent unwanted drama on the back end.
This month’s column is a continuation of my September and October columns regarding excessively long commissioning action lists (CALs). I will continue exploring the multiple reasons why the CAL might get out of hand, who might be responsible, and what the commissioning professional might do about it.
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COMMISSIONING

Commissioning Action Lists: Keeping Them Under Control, Part 1

Schedules can get out of control for several reasons. What’s to be done to prevent or minimize the fallout?
Last month, this column introduced the concept of an “excessively long” commissioning action list (CAL).
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COMMISSIONING

Commissioning Action Lists: What Is Too Long?

A lengthy to-do list after FPT can cause more problems than it solves.
I am a strong proponent of planning ahead for successful functional performance testing.
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COMMISSIONING

Beware Of Single-Mode Balancing Reports

System success depends on a well-rounded TAB procedure.
Proper air and water balancing is critical to HVAC system performance.
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COMMISSIONING

An Appropriate Level Of Effort

A tricky RFP question gets trickier when the “correct” answer might depend on the particular owner.
The following is a question posed in a recent Request for Proposal (RFP) for commissioning services.
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Commissioning

Designer Copy/Paste

Don’t let this all too common practice create confusing specifications.
In December 2013, this Commissioning column addressed the challenges posed by controls contractors who “cut and paste” the design engineer’s sequences of operation into the controls submittal.
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Commissioning

Just Because You Can, Doesn’t Mean You Should

Complex HVAC systems only stand a chance when endusers have the interest and ability for a long-term commitment.
HVAC systems can do amazing things these days — things that were unthinkable even 20 years ago.
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Commissioning

Remote System Readiness Verification

As technology advances, the pre-functional checklist is becoming a thing of the past.
When I started building systems commissioning 25 years ago, it did not take long to figure out that more was needed to confirm that the commissioned systems were complete and ready for testing than just the general contractor’s word for it.
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Commissioning

Unsampled Systems

Choosing not to sample every system can be a gamble, but here are some ways to lower your risk.
Over the past two months, this column has addressed the issue of sampling systems for field functional performance testing
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2014 December

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