Articles by Rebecca Thatcher Ellis, P.E.

Commissioning

When “Substantial Completion” Is Insubstantial

By Rebecca Thatcher Ellis, P.E.
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A concept created for special circumstances has become a sad S.O.P.
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Commissioning

Documenting Integrated HVAC Controls

By Rebecca Thatcher Ellis, P.E.
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When it comes to manual labor, the buck needs to stop somewhere.
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Commissioning

Data Integration During Construction

By Rebecca Thatcher Ellis, P.E.
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The commissioning agent can steer this to avoid data paralysis later.
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Troubleshooting Systems With Onboard Equipment Controllers

By Rebecca Thatcher Ellis, P.E.
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Skimpy interface with BAS means more points of contention.
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Is Systems Integration Getting Worse?

By Rebecca Thatcher Ellis, P.E.
3 Comments
The latest "progress" has yielded its own growing pains and pressures.
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Heating Hot Water System Trend Analysis

By Rebecca Thatcher Ellis, P.E.
One Comment
Could detecting a manual override suggest deeper problems?
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Single-Zone AHU Trend Analysis – Cooling

By Rebecca Thatcher Ellis, P.E.
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How would you know if you were getting the right result via the wrong sequence of events?
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Single-Zone AHU Trend Analysis

On to a new case after solving a museum mystery …
By Rebecca Thatcher Ellis, P.E.
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In this column, I will describe the “issue” disclosed through analysis of the trend graph included in my January 2012 column. I will also introduce a new system and show its trend graph, leaving it up to the reader to discover the operational “issue” illustrated in the graph. The answer will be given at the start of next month’s column.
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Public Art Gallery AHU Trend Analysis

By Rebecca Thatcher Ellis, P.E.
4 Comments
The $4,000/yr problem was not on display for, or even noticeable by, visitors and staff.
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Art StorageVault AHU Trend Analysis

By Rebecca Thatcher Ellis, P.E.
One Comment
What secret is this dark vault hiding?
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2014 August

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