Slide background

Rotary Heat Recovery Wheel

Air Exchange for I.A.Q. Improvement

Energy Saving for Green HVAC System


Slide background

Rotary Heat Recovery Wheel

Air Exchange for I.A.Q. Improvement

Energy Saving for Green HVAC System




The great news for readers


Hi everybody! Welcome to our office’s cyber products information page. The bellowing messages notice the dilemmas of STC heat exchanger Energy Saving and Indoor Air Quality, meanwhile, brings the best effects from healthy air with the environmental friendly machine.


“Indoor Air Quality” and “Energy Saving” are two extreme request, there are deep levels of contractions exists for many years. For example: Traditional HVAC chose to use fresh air or by suction exhaust air to control Indoor air Quality, afterwards, realizing the air conditioner exhaust electricity has exceed more than 60% or above while does not meet the energy saving and even the environmental protection request! The indoor air will get worse if stop using it! Whether there are any methods to get both advantages? Our website can help you to figure out the answers.


First of all, we are honestly hoping our friends in the industry and our product users could take the lead to get know in our authenticity technique of STC heat exchange and analyze the static report of Hong Kong users; at the same time, we invited related professor to judge. After the impartially and positively Judge, with the help of our friends of industry, we try to figure out a way to remove the old perception of ventilation in the old buildings; combine the plan of development, architectural design, indoor design, consular and air conditioner engineering of machinery and power-generating equipment and so on, which are friends of industry to communicate to apply for the whole Hong Kong. Creating healthy life for every citizens, energy saving and the green city which enhance environmental protection were our aims.


We appeal with the help of his website for every people who have responsibility of the industrial facilities to cherish the treasurable resource, do not randomly accept the traditional power saving proposal, or buy the low efficient power saving product and equipment. In case not to block the process of environmental protection or even lost before gaining any benefits.




The reality of usual problems


ENERGY SAVING Is the hot issues of nowadays which every bodies cares about, there are many wonderful ideas which promote from the industry, use all methods and what they have in minds to investigate the technologies, different sorts of power saving products comes out while the process. However, some of the single products have extremely difference in the effect of energy saving, it might increase the burden of the trashes in reclamation area; the exhaustion of energy would only increase but not decrease or no longer recover the cost of it. Eventually, could not reach the aim and even lost your direction!


INDOOR AIR QUALITY We spend more than 70% of our time at homes, in offices and other indoor environment, poor indoor air quality can lead to discomfort. Good indoor air quality safeguards the health of the building occupants and contributes to their comfort and well being.


Therefore, this is another hot issue of health that everyone concerns about. Misusing the wrong method that hurts health more than protect health could be sassily done as majority of people do not know much about pollutants in indoor air. Hence, we might even not able to protect our living place air quality as well.


Wrong perceptions including: chosen the single function of Indoor germs killing machine or add the air conditioner or VRV etc. Professors and some information of Liberal Studies have noticed citizen several times that killing germs or enlarge the size of air conditioner does not mean the pollutant air has exhaust to outdoor. Also, it does not means the fresh air from outside has been absorbed which we called outdoor air. Thus, it cannot efficiently solve the problems of Indoor ventilations


Additionally, the observation of these years shows that the majority of engineering of machinery and power-generating equipment still adopt the traditional way to treat the Indoor air pollutions. Such as chose the traditional fresh air fan, ventilator or low efficient fresh air pre-conditioner to solve the problems. These will only increase the energy usage heavily, unstable temperature and even have waters droplets comes out. These traditional designs will make user ends up with close all the ventilations electrical machine. Eventually, users will gain noting.




Common IAQ Pollutants


Carbon dioxide from people, pets, and plants;

  • Living things breathe out carbon dioxide.
  • A high level of carbon dioxide in the indoor means there is an inadequate supply of fresh air. This is usually caused by:
  •     * Improper partitioning and overcrowding;
        * Infrequent window opening; or
        * Improper maintenance or operation of the ventilation system.

  • It will make you feel sleepy, and provide a warning for possible build-up of other indoor air pollutants.


Biological contaminants
from people, pets, and plants, include bacteria, fungi and microscopic allergens such as dust mites.
Their growth may be accelerated by:

  • Inadequate ventilation;
  • High humidity; or
  • Dirty air filter and ducting of air conditioners or ventilation systems.

They may cause sneezing, watery eyes, coughing, shortness of breath, dizziness and lethargy.
Some of them may trigger allergic or asthmatic reactions


Radonfrom building materials;

  • Radon is a colourless and odourless radioactive gas that comes out from concrete building materials containing granite.
  • It can accumulate to a high concentration if the premises are poorly ventilated.
  • Exposure to elevated radon and its decay products may increase the incidence of lung cancer.


Volatile Organic Compounds

  • From household or consumer products such as cosmetics, pesticide,etc.;
  • After dry cleaning, clothing might have residues of VOCs, such as benzene, toluene and xylene.
  • These products are used for wall painting or paint stripping.
  • This may cause discomfort, and even worse, may cause cancer.


emissions in the indoor mainly come from furniture made of wood products

  • from pressed wood products with urea-formaldehyde as adhesive or coating materials.
  • Other sources include gas cooking, incense burning, carpeting, etc.
  • A high level of formaldehyde will irritate your eyes, nose and throat


Environmental tobacco smoke
(ETS) from smoking (Second hand smoking)

  • ETS is a mixture of the smoke given off by the burning end of a cigarette, pipe, or cigar, and the smoke exhaled by the smoker.
  • It is a complex mixture of over 4,000 chemical compounds.
  • ETS is a strong irritant and a known cancer causing agent. It causes eye, nose, and throat irritation and may significantly increase the risk of lung cancer and other respiratory illnesses.



  • Can be produced by equipment that utilises ultra-violet light or causes ionisation of air.
  • This includes photocopiers, laser printers and ionisers.
  • Ozone is highly reactive and could cause serious damage to the lung if inhaled in high concentrations.
  • It also irritates the eyes and respiratory tract.
  • However, because it is so reactive, it is only found in substantial concentrations near the source, and generally does not tend to accumulate in the indoor environment.

Remarks: Above information from Indoor Air Quality Information Centre