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Articles by Gary Hamilton P.E.

ASHRAE 170 Update: Standard Operating Procedure

Air changes in some but not all spaces, duct liner here but not necessarily there, rooftop unit requirements … do the rounds and get a feel for the current condition of ASHRAE Standard 170, Ventilation of Health Care Facilities.
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Chiller Retrofits In Health Care Facilities

One of the worst things you can do is note the capacity and replace the chiller. Have the building loads and usage changed? What about motors and cooling towers? Consider these and your part-load realities to create real long-term improvements.
The replacement of chillers for hospitals and other health care facilities are often done out of absolute necessity, and it is often avoided for as long as possible.
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Motor Selection HVAC Design

Who actually specified that motor? Did they keep the entire system in mind or were they simply specifying one component at a time? And will that spec require over-speeding the motor?
Often, an HVAC system is designed by the selection of individual components and not by a whole-system approach
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Calculated With Care: Ventilation in Health Care Systems

A Mississippi clinic needed above-average design on a budget. The equipment was nothing unusual. However, creativity and attention to detail uncovered opportunities to fine-tune the design and exceed ventilation benchmarks for less.
Engineers’ daily challenges include calculations for outside air, supply air, and return or exhaust air flows — all while balancing mandated code requirements with owners’ expectations for performance, equipment first-cost, and future energy costs.
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2014 December

Check out the December 2014 issue of Engineered Systems.
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Tomorrow's Environment Podcast

This series from longtime columnist and chronic forward-thinker Howard McKew covers a lot of ground -- from retrocommissioning to systems training, on toward checklists for drawings and tips for meeting minutes. Click HERE to be taken to the podcast page!

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