The Retrofit That Made Things Worse

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Bourdon Tube Investigation

Industry experts contacted indicated that the volume of a Bourdon tube does not change while flexing or they had no data on this consideration. If the industry consensus is true, work output can exceed work input (Wout ˃ Win) as per an APS experiment.

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150 Years of Actuators in One Room

From an 1874 patent to David Strain’s latest designs — this video puts them all in motion. Watch the fluid flow through each one. Understand how mechanical advantage actually builds. The history of actuator design, demonstrated side by side.

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How efficient are HVAC systems in filtering virus

The APS manual highlights concerns about the effectiveness of HVAC system upgrades in mitigating COVID-19 transmission. While authorities have recommended increasing ventilation and upgrading filters to MERV 13, APS questions the necessity and efficacy of these measures.

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Questions?
Induction units provide heating and cooling for offices in many commercial buildings. This video explains how these systems operate and highlights two major BAS retrofit errors that we have encountered in the field. While these issues can significantly impact performance, the original induction unit design is also inherently energy inefficient. That broader design issue, along with practical methods for improving efficiency, will be addressed in a separate video.