Understanding the 4 Types of Air Purifiers

Due to Covid-19 pandemic, there are rising concerns about the potential transmission of the virus in enclosed spaces such as indoor areas, where air-borne bacteria and viruses can circulate when airflow is restricted. To prevent bad airflow, people are becoming more interested in the air purifying system to lower the risk of getting sick. There are four main types of air purifiers that are used at home .

HEPA Purifiers

The most common one is the HEPA purifiers. High-efficiency particulate air (HEPA) filters capture airborne particles from moving air using a dense, random arrangement of fibers. HEPA filters use the physics of particles moving through air to yank them out of the airflow. Their operation is simple but extremely effective. They have an efficiency of removing 99.97% of particulate matter of size less than 0.3 microns from contaminated air ensuring a flow rate anywhere between 150 -400 cubic feet per minute depending on the clogging of their pores.


Pros:

Reduces allergy and asthma symptoms:

Particles like dust, dander, and pollen that cause allergy symptoms are large enough for a HEPA filter to catch

Commonly available:

HEPA filters are found in a variety of home appliances including whole-house air filtration units, portable air purifiers, and vacuum cleaners.

Produces no byproducts:

Other air purifying products like ozone, ionizers, and PECO all emit a harmful byproduct into the air.

 

Cons:

Won’t remove every particle:

will not remove pollutants from the air that are smaller than 0.3 microns, including viruses, some bacteria, and volatile organic compounds (VOCs).

Requires frequent replacement:

HEPA filters trap most of the particulates in the air. This means they tend to clog faster than more porous filters.

Can be difficult to clean:

The shape and size of your air purifier may make it difficult to access the HEPA filter and clean it.

 

Sources:

The Pros and Cons of Using a HEPA Filter in Your Home Air System

https://molekule.science/pros-cons-hepa-filter/


UV Purifiers

Industrial installation for UV water purification

UV stands for ultraviolet. UV Air Filtration is a specialized way of treating your air that reduces biological compounds.  It can also help eliminate potentially harmful bacteria and viruses from the air. There are special products that can be installed in addition to the current HVAC systems so that the UV air filtration or UV air purification system purifies the air as it is conditioned by your AC and heating system.


Pros:

Elimination

eliminate microscopic elements, such as viruses, bacteria, or mold, that can be toxic or harmful

Silent:

you won’t even know it’s running

Won’t accumulate dirt:

there’s no physical filter

 

Cons:

Won’t remove every particle:

most allergens, dust, or other solids such as cigarette smoke, gases, or other chemical fumes cannot remove.

Require some maintenance:

AirCleaner.org tells us “every year, about 15% of an ultraviolet light’s power is decreased.”

http://www.aircleaner.org/uv-air-purifiers/

By-product created:

When UV purifiers expose air to UV light, the same energy that breaks the bonds of DNA in microorganisms can also split oxygen (O₂), which can reform into ozone (O₃). While beneficial high in the atmosphere, ozone is a dangerous pollution in your home.

 

Sources:

https://www.comfortexpertsinc.com/blog/2015/april/pros-and-cons-of-uv-air-filtration/

https://www.schnellerair.com/blog/pros-cons-what-you-need-to-know-about-uv-air-filtration/


Ozone Air Purifiers

Ozone is a molecule composed of three atoms of oxygen. Two atoms of oxygen form the basic oxygen molecule–the oxygen we breathe that is essential to life. The third oxygen atom can detach from the ozone molecule, and re-attach to molecules of other substances, thereby altering their chemical composition. It is this ability to react with other substances that forms the basis of many manufacturers’ claims.


Pro

more applicable:

applicable for biological contaminants, not airborne inorganic particulates or chemicals

non-occupant settings:

ozone generators can be used to disinfect the air and kill microbes

 

Con

immediately harmful to your health

ozone can damage the lungs. Relatively low amounts can cause chest pain, coughing, shortness of breath and throat irritation.

leaving byproducts:

just as bad or even worse than the original chemicals.

 

Sources:

https://ww2.arb.ca.gov/our-work/programs/air-cleaners-ozone-products/hazardous-ozone-generating-air-purifiers

https://www.epa.gov/indoor-air-quality-iaq/ozone-generators-are-sold-air-cleaners#intro


NCCO Purifier

NCCO is an innovative technology invented by members of HKUST Entrepreneurship Program. It has been well recognized by the Hong Kong government and the public sector and is a revolutionary air purification technology that will change the world.

In comparison to other air purification technologies such as activated charcoal, UV light and electrostatic precipitator. NCCO is more efficient at removing pollutants. For example, activated charcoal can only absorb but not decompose pollutants, and can only last for a short period of time (usually three months) without replacement. Once the carbon filter is saturated, the pollutants absorbed will be released to the air causing “second pollution”, which can cause great harm to health.

On the other hand, NCCO can absorb and decompose pollutants continuously by combining Active Oxygen and High grade synthetic zeolite, and the technology can last for up to 12 years in a laboratory environment. NCCO has solved a range of air pollution issues in different sectors including commercial, industrial, retail and motor etc. In addition, it can resolve indoor and outdoor air quality problems including pollution caused by PM2.5, PM10, VOCs and formaldehyde. Being able to remove the root sources of pollutants, NCCO acts as an excellent air purifier. Being a proven concept with these capabilities, NCCO is playing an important role in air purification technology development.


Application for NCCO Purifier

fan coil system

Office Ceiling

Lift

 

 

 

 

 

 

 

 

Pitfalls of Buying Off-Plan Overseas

Buying Off-Plan Property is a well established practice in Hong Kong. Buyers enjoy a discount, staged payments, and more choices to choose from. This popularity is built on the foundation of regulations that protects the buyers, results of painful experience of yesteryears. With the current surge of outbound investments, especially in residential markets that are familiar to many, investors should examine these opportunities when buying Off-Plan. 

Many assume that the Common Law countries would provide the same level of protection as does Hong Kong, being a former British colony. However, selling Off-Plan Properties was not a common practice, and such sales are much less regulated than in Hong Kong. There is no shortage of examples where overseas buyers lose money on these deals due to lack of oversight. These issues may range from delays in completion, over budget, building quality, developer solvency issues, or even outright cheating investors. Oftentimes, the process of planning permissions and other government approvals may take much longer than in Hong Kong.

Taxation and law differences are often overlooked by oversea investors. Unlike Hong Kong, many countries do not experience a high rate of value appreciation in real estate, and have policies to keep the residential market from overheating via fees and tax, wiping out the bulk of the investment return. In addition, mortgages may be easily obtained, especially for foreign investors. Local law may have material impact on the investment as well. In Australia, when the S&P agreement is signed, the buyer is on the hook to complete, and there is no simply forfeiting the deposit like in Hong Kong. 

When investing overseas, many have the same assumptions from their hometown. In Hong Kong, apartment flats near public transportation are desirable and can fetch a premium. The opposite is true in Japanese suburbs. In Western countries, houses are preferred over apartments located in busy districts. Buyers may find it difficult to exit their investment if they were equipped with wrong assumptions.

Overseas investors may still enjoy the benefits associated with pre sales, or buying Off-Plan. However, one must fully understand the local market, laws, fees involved, and proper due diligence on the developers. 

 

Sales and promote by LED signage

Along the sliding of commercial retail floor rent due to various factors, one key reason causing retail rental plunging is the digitization of retailing and online sale.

In our feed before, we have pointed out the “QR code” and “sale on screen” are the tremendous trend. GBE sees that the future LED signage display should also deliver the interfacing function with the customer.

For example, the LED resolution should be good enough for popping the QR for immediately scanning. It sounds easy but full of technical know-how. Apart from the compliance to the local regulation, the entire LED system needs to work well with electricity voltage supply, structural mounting of screen, external facade, right angle of vision, traffic safety, maintenance, and the remote digital control to the screening time.

The Case for Building Better Residential

Residential properties in mega metropolitan cities are often short of satisfaction for occupiers. Many may find their flat small, inefficient, and developers trying to cram in all kinds of features with the hope of justifying its price. This is a result of residential units built to prioritize developer’s profit over end user’s satisfaction. With WFH becoming a well adopted trend due to Covid-19, tenants and occupiers are now reexamining their homes, and demanding higher quality space that is compatible with the current environment, and less so on the building’s location or proximity to the CBD.

Taking the Kennedy Terrace project as an example, a building that was designed with the end user is the priority. With a peerless 3700 sqft for its 3 en-suite standard simplex, it sits comfortably on the top of luxury residential tenants’ shortlist. As a direct consequence of not building 1800 sqft flats, competing with the surrendering offerings, Kennedy Terrace achieved approximately double that of neighboring apartment buildings when compared on a per sqft basis. The ample ceiling height, efficient layout of the unit, and the centralization of the apartment’s electrical system make the flat the ultimate blank canvas for its occupiers to personalize the unit to their heart’s content

Increasingly, landlords and developers of luxury residential sites are now faced with a dichotomy, whether to prioritize the volume of units available, or catering to the undeserved demand for larger space such as Kennedy Terrace. While the decision to provide truly spacious flats at the expense of a number of units may seem counterproductive at the beginning, filling the glaring disconnect between developer and end user’s may be as rewarding, if not more. 

Bloomberg: Hong Kong’s Rich Are Preparing for a Worst-Case Scenario

https://www.bloomberg.com/news/articles/2020-06-13/hong-kong-s-rich-are-preparing-for-a-worst-case-scenario

While many predict Hong Kong’s real estate will experience increased pressure under the unresolved Covid-19 situation and National Security Laws, one must understand the Hong Kong real estate market is quite unique. While other mega metropolitan cities do provide relatively flush liquidity, their property markets have very different characteristics. Unlike Hong Kong, the bulk of the value of a development lies in the structure rather than the land, prices are driven by yield rather than speculations, and a host of fees and taxes that keeps prices certain sectors in check. London’s residential market, for example, is yielding multiples of that of Hong Kong’s while on the surface. However, landlord’s rental returns are quickly eroded by government fees and tax, and additional penalties for overseas landlord. While it is shrewd to have diversification, one should acquire comprehensive and holistic understanding of a foreign market before allocating one’s asset into it.

Austin Avenue Project

GBE reads the Propertyweek. GBE lead Austin Avenue project and have known many buildings in Hong Kong usually was not built with extra E-power; not with adequate ventilation ducting. Worse still, the louvres provision are limited by the pre-dominated needs for beautiful windows and the clear headroom is typically low for better GFA. This makes health sector be difficult to find right premises even this asset class is deemed to be the resilient and perform well in R.O.E.

Insight from Bloomberg -Share-office markets appears to be crashed by pandemic

GBE keeps abreast with market. Share-office markets appears to be crashed by pandemic. The capex injection for asset enhancement in return for future uplifting the accrual income in book apparently does not work. Office conversion to shared space involving right layout design, positioning the openable window, IT infrastructure, air treatment and circulation, Fireman staircase interchange, Beverage corner, right billboard, right elevator access and washroom facilities. These are all inter-acting factors for successful operation from Professional Building Surveyor

Mingtiandi reported Softbank pulled out from WE-WORK india
Bloomberg reported 23 April

Insight from Mckinsey – How consumer-goods companies can prepare for the next normal

Respond to C-19 pandemic.While many feel frustrated to the pandemic, “Amazon” has identified the significant up-soaring of fresh food groceries. Mckinsey reported the large-leaping of health-related products demand in China. GBE sees the derived demand for logistic, particularly the hidden demand for cold storage warehouse sitting along the major traffic route. GBE experienced the technical essence of cold storage is multiple.high ceiling warehouse; thermo-control partition wall;energy efficiency colding; loading/unloading space; cargo,water proof finishes.

Credit:

https://www.mckinsey.com/industries/consumer-packaged-goods/our-insights/how-consumer-goods-companies-can-prepare-for-the-next-normal?fbclid=IwAR3guiEFoYp-l_lDjiBMoELM4NNDxsG3S27nJE1QGYwjzlTcW2ceDJhAWi0

Insight from Financial Time – Tech stock rally turns Nasdaq positive for the year

Financial times told us “resilient” found in telecommunication giant. In the world of highly interdependent, the real estate expert and professional services almost needs to resort telecommunication to leverage their efficiency and accuracy. GBE believes the real estate and digital are not mutually exclusive. More to explore.

Credit:

https://www.ft.com/content/15aa4ce4-8a0d-46dc-a461-aa60207031d6?fbclid=IwAR0xUE2RyKAWxcvU9eqelt206484jgrgws62YRmJQamVGn7K9Da-X5GqEFM

 

Insight from Bloomberg – Fed Warns of Significant Hit to Asset Prices If Crisis Grows

GBE agrees very much this headline from Bloomberg. It comes to our attention some institutions have been carrying out silently “de risking” or “de leveraging” in their already heavy-loaded asset portfolio taking the advance that the real estate market out-looks apparently look relatively stable than other investment

 

Credit:

https://www.bloomberg.com/news/articles/2020-05-15/fed-warns-of-significant-hit-to-asset-prices-if-pandemic-grows