Director at Kelcroft, focused on energy efficient M&E services, energy including energy auditing and sustainability consulting for Asia. He is an EMSD Registered Energy Assessor (EA00496G) Fellow of the Charted Institute of Plumbing and Heating Engineers, and a BEAM Professional.
Building infrared inspection reveals hidden defects not visible to the human eye, the temperature image can locate the source of water ingress, damp, water damage, locate missing sections of thermal insulation missing, identify overheating switchgear, and much more.
Hong Kong notched up another record, 2019 was the hottest year since records began in 1884 the Hong Kong Observatory (HKO) revealed .
It should be no surprise really, almost every year HKO reports that temperatures have been steadily increasing year on year, a trend that is not so easy to reverse.
Asia is dominated by the use of electricity for air conditioning, and warmer weather means higher energy bills, and it is not just a local affair either, Australia is also suffering from hotter temperatures and devasting wildfires.
In addition to warmer weather, increasing the air conditioning running hours, the Hong Kong electricity tariffs increased again in 2020, which will add 3-5% to your energy bills.
To offset the increasing costs, building owners can use the subsidies provided by HEC  and CLP to help finance energy efficiency upgrades for the building communal systems, including air conditioning, lifts, lighting, and pumps.
Positive building pressurisation and proper filtering of the outdoor air will be more important as testing reveals plastic in the air we breathe!
Plastic particles have been found in the air in the mountains but now in cities . It may take years for the human studies and research but commonsense dictates plastic inside the human body, particularly in the lung should be minimised now.
Youtube means you can watch construction in motion, what happens if you hire a contractor without professional supervision, enjoy
This project is in New York, USA, apparently, the contractor quoted to install plywood flooring but instead installed a different material, reported to be OSB which as we know practically dissolves in high humidity, the saga continues…….
Fear not, RTHK reports that some Hong Kong Electric corporate customers will be exempt, but that is bad news for the individual customers who will be paying for that corporate windfall.
In this context, we suspect that corporate customers really means their highest electricity users, and automatically reducing the financial incentive to lower their energy consumption and lower costs.
Part of the problem is related to Hong Kong’s energy policy, it only targets lowering carbon intensity which seems fantastic until you know their plan, to importing more electricity from China generated by nuclear power, this policy is short-sighted, it encourages the status quo, keeping the energy-wasting business as usual culture in place, causing energy waste which has reached epidemic proportions in Hong Kong.
Last year we predicted these increasing tariffs, so looking forward we’ll predict and expect the same type of Christmas gift form HKE and CLP next year.
Moisture is a problem in the tropics so its important to understand two issues, moisture is transported within the air, and through a process known as Diffusion.
One property of air is the water vapour pressure, for air-conditioned buildings, we are mainly concerned with the difference between the outdoor and indoor water vapour pressure. Why air-conditioned buildings? Cooling and dehumidifying indoor air lowers the indoor water vapour pressure.
In the CIBSE guide or equal, properties of air, look up the water vapour pressure for outdoor air say 35 db/28 wb and an air-conditioned space, lets say 24 degC and 50% rh. That delta P, the pressure difference is the driving force for moisture diffusion through the building envelope, including curtain walls, towards the lower pressure space inside buildings.
Typically, we expect that “Good Ventilation” inside the building will transport that moisture and condense it on the cooling coil. However, if the internal face of the external wall is blocked, with a vapour barrier on the inside or obstacles preventing air movement, moisture will accumulate internally causing mould.
Often vinyl wallpaper or a polymer type paint, essentially a layer of plastic, is used inside buildings, which stalls diffusion, causing moisture to accumulate internally, causing damp and mould as shown in the diagram above. If the room is naturally ventilated the water vapour pressure inside and outdoor are effectively equal, and adjacent air-conditioned rooms would with similar conditions means the delta P is also effectively zero.
So its important to understand the different processes, to solve IAQ problems.
The Hong Kong outdoor air quality and therefore the indoor air quality will be miserable for the first week of Oct. 2019 impacting productivity as the number of sick days is likely to increase in the urban areas (the places where people work).
The AQICN.org website is an invaluable resource reporting the real-time outdoor air quality but also providing a prediction for the next few days, and its bad news, it predicts Unhealthy (over 100) air quality.
Study after study shows poor air quality correlates with increasing hospital visits for respiratory problems.
Can we improve the Hong Kong Indoor Air Quality? the simple answer is yes, controlling the outdoor air is important to prevent condensation, and properly cleaning the air, before pumping it around the office, is the most practical solution.
Hong Kong’s IAQ certificate requires the outdoor air quality to meet the same criteria as the indoor air quality values, so we guarantee no measurements can be taken this week!
And that’s its weakness, those measurements are a snapshot, taken on days with “good” outdoor air quality, this gives owners a false sense of security, on other occasions the Outdoor Air Quality and therefore the Indoor Air Quality does not meet the objective.
Proper air outdoor air management, including air cleaning, will improve the indoor air quality in your building, in your lungs, and lower the number of Hong Kong sick days.
HEC and CLP can provide a subsidy to building owners/managers to upgrade the communal services in buildings, including air conditioning, lifts, lighting, water pumps, etc. in commercial and residential buildings.
It’s a fantastic opportunity for capital (CAPex) funding for energy efficiency improvement work! Both schemes are arranged to provide the rebate AFTER the work is completed and approved by the respective utility.
Greening of existing buildings can be a challenge, but the HEC Eco building fund and CLP Smart Power fund can help finance energy efficiency improvement to lower your CAPex and your future energy bills.
For more information call us on +852 2335 9830 today!