Kelcroft E&M Limited John Herbert
unit A10 Kowloon Bay Hong Kong
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Retro Commissioning Hong Kong

John Herbert, hong kong energy saving expert, BEAM expert
John Herbert

Good reasons to recommend retro commissioning:

  1. Recover degraded performance
  2. Reducing wasted energy
  3. Improving facility operation
  4. Bring equipment back to proper operational state
  5. Increasing equipment life, lowering the total cost of ownership
  6. Reducing complaints and increasing tenant satisfaction
  7. Reduce staff time spent on emergency calls
Retro-Commissioning also known as re-commissioning fine tunes system performance, adding capital value, lowering operating costs, and improving comfort conditions for the occupants within existing buildings.

building tuning, re-commissioning building services poor sensor location
Room thermostat set at 10 degC to compensate for poor sensor location next to hand dryer
credit: John Herbert

Properly conducted commissioning ensures that the systems operate as intended creating comfortable environment for your employees. But what then? Does the building run for twenty years without a tuning?

Building Tuning

Over time your organisation and its needs will change and evolve and mechanical systems degrade. The E&M systems, particularly the HVAC systems, are often over looked, ignored unless there is a major problem. That's like running your car for twenty years or more without a tune-up.


Retro-Commissioning (re-commissioning) is the equivalent of that essential vehicle tune-up, uncovering opportunities to lower operating costs, recovering lost performance, improving comfort, and importantly rediscovering lost productivity.

The correct diagnosis prevents waste and lowers your energy bill.


BMS systems are like everything else in life, they degrade over time if they are not maintained. Because they are small, hidden, and often forgotten, thermostats are not checked for settings or failure, control loops are not tuned, sensors are not recalibrated (if they were ever calibrated in the first place), dampers get stuck, control valves leak or actuators fail operate correctly, set points are intentionally or unintentionally overwritten.....the list goes on and on.

To prevent interrupting the operation of the building, we find buildings suffer the quick fix, damper motors missing or disconnected, automatic control valves set by hand, etc. all with the best intentions, that it will be repaired at some future time.

retro commissioning hk

But the real question is how can energy be saved, and lower costs achieved without causing other problems? Where can an energy-saving project compete for the same limited dollars an owner has available? One answer may be retro commissioning!

Retro-commissioning is a systematic procedure to identifying operational and maintenance improvements for existing buildings and for ensuring their continued performance over time.

Would you run your car for twenty years without regular servicing?
why run your building that way?

Retro commissioning process should optimize how equipment and systems operate, but also to optimise how the all the various systems function together, in an operational setting.

retro commissioning hong kong

For further information regarding retrox commissioning call us today!

retro commissioning HK

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kelcroft consultants hong kong