Experts from the Ministry of Construction, Ministry of Health and China Refrigeration and Air Conditioning Industry Association as well as corporate representatives held an AC and Healthy Indoors Environment Summit recently. This was an important seminar on ventilation standards in China where ventilation standards and relevant management methods were researched.

As is well known, safety operation standards for AC directly affect the product line of manufacturers as well as the maintenance cost of users. And such a standard is hopefully to be set as a compulsory industry standard for centralized air conditioning in all large shopping malls, hotels and office buildings. Thus, all experts and enterprise representatives deliberated on how to improve its feasibility and cost-effectiveness. Yadu Technology Ltd Com. unveiled its solution at the summit. He Lumin, president of Yadu, said that the key for healthy AC is a fresh air replacement system. But in view of China's national condition, a cost-saving fresh air replacement solution must be given top priority in drafting a standard.

In order to save investment and maintenance costs, the design and operation of central air conditioners used to neglect fresh air replacement. Moreover, "less fresh air" has been applied as an effective measure to streamline system investment costs. For example, a supermarket covering 10,000 square meters, will pay 50% extra power fees once it meets the standard of 30 cubic meters fresh air per capita per hour, relative to 10% less fresh air in total ventilation as is usual. Not least the system alternation costs. He Lumin said that Yadu has been dedicated to developing a solution to reduce system alternation and operation costs. Yadu's solution for a fresh air replacement unit employs heat recycling and energy compensation technology. Users make almost no change to the original system and will only have a 15 percent operation cost rise.

(China.org.cn by Alex Xu September 15, 2003)