retro commissioning by John A. Herbert

The principal is sound, if not the name. If you are old enough to remember the adverts for a crypton tune-up, you’ll understand the gist.

Due to mechanical wear and tear the engineering systems in our buildings inevitably need attention, and some twenty years ago, the phrase re-commissioning entered our vocabulary to brand the process of tuning the often forgotten ACMV systems.

But it is not really commissioning, not even close. Commissioning occurs after a new system is installed and those static systems are set into operation for the first time, complete with the countless startup and shutdown checklists.

Here in Hong Kong, T&C (Testing and Commissioning) is commonly used for starting new systems. To fix old buildings, the term “commissioning” is a misnomer in my view, it simply doesn’t apply to an existing system already operating.  Building tuning, my preferred term, is apter. We want to check and adjust, not start from scratch. For example, for the chilled water circuit, the point of re-commisisoning, as it is called, would be to check the flow rates and pressures satisfy the design intent, Because pumps and motors may have changed, the control valves need checking, what’s the value authority, etc. From experience, flow direction labels installed backward are confusing.

John A. Herbert energy expert

Indeed, a key target for undertaking re-commissioning is the same as an energy audit, to find cost saving opportunities and lower operating costs. Particularly for air conditioning systems, warmer weather over the last three years has caused increased energy costs, and the Observatory is predicting that this season will be another record.  Yet, some buildings are still operating today where the set points were checked at Practical Completion.

Yet, some buildings operating today have set points last checked at Practical Completion. Although buildings appear to be static, internally the mechanical and electricity systems need attention.

For advice regarding re-commissioning contact the experts today!

Green Building defined by John A. Herbert

green building, john herbert is green building expert

by John A. Herbert

What is the definition of green building? First, some definitions [1] from around the world. Continue reading

Secret Life of Chillers by John A. Herbert

energy audit expert

Every energy audit is the same but different, the goal, searching for cost and energy savings is the same. whether its factory or office. And we follow the same published process, yet every energy audit guide attempts to detail how to identify those cost savings, and that is where the document evolves from its clinical, prescriptive list of requirements into vague generalizations because examining data, sometimes imperfect data, to find cost savings is more art than science. Continue reading

your life in the hands of the building owner by John A. Herbert

fire safety, fire survey, Hong Kong buildings

Considering Hong Kong’s maze of skyscrapers you might be surprised to learn that the Hong Kong fire department does not routinely check your building. After opening building fire safety, and your life, rests with the building owner. Once a year the building owner must engage a Registered Fire Services Contractor to check the fire fighting equipment, that is the theory.

Continue reading

No excuse to delay energy upgrades on HK Island by John A. Herbert

Funding Energy Upgrades

John Herbert - Green Building Seminar 2011
Cost is always the key issue for energy upgrading projects right? Yet dollar matched funding, upto HKD 200,000 is available for residential projects on Hong Kong Island. For example, for Incorporated Owners (IO) where the total cost of your energy saving project is for example HKD150,000, HKD 75,000 is refunded!

Kelcroft is a Qualified Service Provider (QSP) with practical expert advice to lower your costs, and energy consumption, call the experts today!

For commerical buildings you might be interested to view our Hong Kong Building Energy Consumption Mapping Project (beta) web page.

About the Author

John A. Herbert is a veteran energy expert with more than 30 years construction experience, educated in the United Kingdom he has been working across Asia for two decades for international and local companies. He is a Hong Kong Registered Energy Assessor (REA), and BEAM Professional.

Green but not the colour for cooling towers by John A. Herbert

The world is catching on, the Green Building concept, where Green equates with Good, but not for cooling towers. Cooling towers need to be audited every year in Hong Kong, here is an example of a very poor Hong Kong cooling tower, with algae covering the entire floor of the cooling tower cell1 and cell2 … Legionella risk: severe

Kelcroft conducts the annual EMSD cooling tower audits in accordance with EMSD code for annual audit requirements, call the experts today.

About the Author

John A. Herbert is a veteran professional with more than 30 years solid construction experience, educated in the United Kingdom he has been working across Asia for the last two decades, serving international, and local companies. And involved with the development of Hong Kong Green Building for more than a decade. He is a Hong Kong Registered Energy Assessor (REA), and a BEAM Professional.

John A. Herbert attended Eco Expo Asia 2015

Kelcroft’s director Mr John A. Herbert, attended the annual Eco Expo Asia 2015.

Kelcroft in HK Trader Magazine by John A. Herbert

John Herbert interview published in Hong Kong Trader Magazine, Kelcroft

We are proud that Kelcroft’s John A. Herbert was featured in the HK trader magazine, he was interviewed about the future outlook for green and environmental products in the region.