Category Archives: energy audit

energy costs

2015 was the hottest year on record so far, so without reading your bill we know the result, your energy bills were higher than before if you used air conditioning, because air conditioning is the largest portion of energy usage … Continue reading

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energy audit: inefficiency

by John A. Herbert Part of the energy audit process should be to review the condition of the plant, and equipment, generally if problems are discovered these can be categorised as deferred maintenance. Here an example, an 800 mm axial fan, … Continue reading

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What is the condition of your AHU?

by John A. Herbert The above pictured AHU cooling coil was ‘maintained’ by the term Air conditioning contractor. However, during our energy audit we inspected the AHU, dropped the air filters and found that the cooling coil was plugged, approx. … Continue reading

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Anatomy of the Energy Audit

by John A. Herbert An energy audit is much like an annual financial review but instead of profit and loss, the data and information is based on historical energy usage, the energy audit deliverable is the energyLAB energy audit report, … Continue reading

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Government Energy Audit EMSD

by John A. Herbert, REA The Hong Kong Government enacted the BEEO in order to regulate the energy efficiency of key building services installations inside prescribed buildings, building owners are required to hire Registered Energy Assessor to undertake energy audits, … Continue reading

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your air conditioning system handling the heat?

It’s the summer, and it’s hot, and humid, over the last few days it have been around 32 Deg C. And air conditioning systems across the region will be working overtime to keep your building cool. In Hong Kong and … Continue reading

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Is this what your AHU looks like?

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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clean labels and motors

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

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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