1. Why a  duct cleaning is needed?

            The routes of air infetion are usually divided into two categories : droplat infection and
            non-dust infection. Dust, one of aerosol, a particle from solidified organic or mineral
            material, becomes harmful to bodies when it's under 5m. Large dusts over 10m, steam from         0.1~10m,or smoke from 0.01 to 0.1m can be problematic, too. Dusts are divided into 5
            categories as follows

             animal dust  : fur, leather, bone, shell, etc.
             vegetable dust       : cotton, flax, grain, etc.
             mineral dust : coal, rock, earth and sand, etc.
             metal dust   : iron, lead, etc.

           What harmful can dust do on human bodies?
           a) Dust stimulates mucous membrane of the respiratory organs and conjunctiva of an eyeball
               Iron, arsenic, Mangeness and Chromium are absorbed into respiratory, digestive organs
               and skin, bring about chemical reaction toward each material's toxicity and rsult in poisoing
               symptoms. Dust also intermediates infection by floating lots of bacilli such as tubercle,
               diphtheria bacillus or small pox germs in the air

            b) The animal fur and pollen cause allergy. The inhabitation of  bacteria corroding iron or
                 non-iron results in a corrosion

                 To eliminate dusts and to prevent disease, duct and air conditioner cleaning is essential
                  needless to say.


    2. How to clean air duct?

            The main characters of our unique duct cleaning system developed especially to clean old
            dusts and attached materials in air conditioning duct of a building are as follows.
            Our cleaning devic is inserted into the duct and automatically moves, cleaning out dusts and
            attached materials in ducts regardless of the shape and the size of the duct. No matter how
            the duct is shaped : square, round or or vertical, no matter how big or small it is, our system
            can completely clean it out

    A. Definition of KSAD construction method

    1) investigation
        Decide an operation method after visual checking and sampling an inside pollution status
        of air condition duct and sampling.
    2) Choose a cleaning device
        Choose a proper cleaning devices : What will connect branch duct and main duct ; What will be
        used for the sucking valve, etc. depending on the shape of duct, pollution stus of inside and

    Way of dust collecting
        Install a working hole into a main duct, cannot a collection duct, and use blower to collect
        dusts from the main duct, so that dusts are not scattered outside and can be collected
        simply indoors.
    4) Test
        Before operation, test on status of the pollution and take a picture, measure collected
        dust amount, and do microorganism test. Compare test results after  operation.

     B.  Merits of KSAD construction method

           Our unique cleaning device has the following merits;

              1) Cleaning even a small caliber duct (100øor 200x200)
              2) Cleaning a vertical and landscaped duct with the same method
              3) Cleaning a large caliber duct without any difficulty
              4) Lowering cost with the use of economic way to clean aduct
              5) Curtailing working procedure

    C. Order of KSAD method

              1) Cleaning sucking and discharging part (anemo, universal, etc.
                 chemical cleaning after tearing off an anemo

              2) duct cleaning
                  Make a decision on operatiom area and indtall an open hole on ceiling or duct to
                  connect a dust-collecting duct.

                  Cleaning the area between open hole to branch duct
                     Slelect the type of the cleaning device depending on the duct's shape(dimension,
                     angular or round) since the cleaning device should be inserted into the duct through                  the the open hole on it

                  Cleaning a branch duct-main duct
                     Insert the cleaning device through the open hole installed for the work

              3) Sterilization and Disinfection
                  Sterilize simultaneously with cleaning inside a duct. After sterilization, insert
                  a cleaning device with a spray nozzle to sprinkle a dedorant and preventives for

              4) Inspection
                  Compare the record before cleaning and after cleaning, and report the result of cleaning.