Category Archives: energy audit

Is this what your AHU looks like?

Posted on December 28, 2011 by John Herbert, REA, energy consultant

The AHU pictured above is failing to deliver adequate service, We found the entire surface of the unit and frame is covered in condensate, forget about the mess, it is expensive wasting energy 18 hours per day instead of cooling … Continue reading →

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designed for full speed

Posted on August 25, 2010 by John Herbert, REA, energy consultant

Vary Your speed HVAC equipment and industrial machinery are designed to operate at the peak capacity, to handle the worst case scenario.  However, during normal operation periods of partial load occur when the load is less than the design load. … Continue reading →

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clean labels and motors

Posted on August 23, 2010 by John Herbert, REA, energy consultant

Buy the most efficient motor available, and keep it clean. Electric motors account for nearly sixty percent (60%) of the global electricity consumption!  Comparing the total life operating cost with the first cost is instructive. Typically the CapEx (capital cost) … Continue reading →

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percentages beware: we do math

Posted on August 4, 2010 by John Herbert, REA, energy consultant

Recently I was talking to a colleague about the pervasive use of the “percentage”.  You will have seen the advertising offering up to 30% energy savings ,  and no doubt you will have seen NGO’s giving awards for 25% percent … Continue reading →

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