Today, the world is facing one of the most serious problems of humanity and other forms of life, pollution. It is a known fact that pollution is very rampant in our communities, country, and world.

For more closely, many types of indoor pollution problems are found in homes. The most effective approach to solving these problems is usually to remove or reduce the sources of indoor pollution. The main irritants that affect poor indoor air and water quality: dust, pollen, pets, dust mites, chemicals, gases, fumes and annoying persistent odors like cigar and cigarette smoke and pet odors.

Now, all of us know that it is no longer easy to solve it and infect, the problem gets harder and harder to solve.

Air and Water cleaning devices can be helpful when used along with source reduction, filtration and ventilation.

Air cleaning devices usually come as portable, stand-alone appliances or as filters or cleaners in a central air system. Portable units can usually help clean the air in a single room, while central air units may improve the air throughout the house.

Ultrasonic is sound generated above human audible level. In real life, high pitch sound is created by high frequency, and alternatively, the low and base tone is created by low frequency. Frequencies above 16 kHz in general are being considered as ultrasonic. Typical ultrasonic frequencies used for cleaning purpose are from 20 kHz to 80 kHz.

Ultrasonic waves can usually only be sent through a material at right angles to the material's surface, and gentle enough not to damage the substrate. It generates in liquid is responsible for the cleaning process. It provides excellent penetration and cleaning in the smallest crevices and between tightly spaced parts in a cleaning tank.

Suitable materials for ultrasonic cleaning are stainless and mild steel, aluminium, copper, brass and other alloys, wood, plastics, rubber, and cloth.

Ozone (O3) is a relatively unstable molecule made up of three atoms of oxygen (O). Although it represents only a tiny fraction of the atmosphere, ozone is crucial for life on Earth. Ozone is not only a very powerful oxidizing agent but also a very powerful non-chemical disinfectant. It has the unique feature of decomposing to a harmless nontoxic environmentally safe material, namely oxygen

Ozone is poisonous and can kill some bacteria and fungi as well as cause changes in molecular/chemical structures to eliminate odors caused by these bacteria. Ozone can kill anaerobic bacteria because they lack the enzymes to break down toxic forms of oxygen. All animals, plants, some fungi, and aerobic bacteria all contain these enzymes

Ion and Anion also exist in our bodies, and the ratio of ions in the air we breathe influences our bodies. Ions enter to body through the lungs as well as through the skin, especially through meridian points, which have weak electronic resistance. Then they through the blood and lymphatic systems to cells throughout the body.

In some offices with computer stations, no negative ions were detected at all! Due to inadequate ventilation both in commercial buildings and energy - efficient houses, as well as from the use of electronic devices that generate electromagnetic fields and from building materials that emit formaldehyde and other toxic fumes. On the other hand, high negative ion levels, such as at waterfalls, hot springs and other highly moist areas, will neutralize positive ions, leading to very low positive ion levels.

Anion increases the flow of oxygen to the brain: resulting in higher alertness, decreased drowsiness, and more mental energy. Therefore anion is good for curing asthma, migraine, bronchitis as well as betterment of individual mentality

HEPA stands for High Efficiency Particulate air, HEPA filter is a type of high-efficiency air filter, remove particles from the air by forcing air through screens with microscopic pores. This makes them highly effective at reducing the number of allergens and asthma triggers (e.g., dust, pollen, mold, dander, tobacco smoke) in an enclosed space.

HEPA filter acts like a sieve where particles smaller than the largest opening can pass through is incorrect. Originally designed for industrial, medical and military use, HEPA filters are now being used to clean the air in individual homes and offices.

Carbon filtering is a method of filtering that uses a piece of activated carbon to remove contaminants and impurities, utilizing chemical adsorption. Each piece of carbon is designed to provide a large section of surface area, in order to allow contaminants the most possible exposure to the filter media.

Activated carbon air filters consist of a vast system of pores of molecular size. These pores are highly adsorbent, forming a strong chemical bond/attraction to odorous, gaseous, and liquid contaminates.

Ultraviolet (UV) light is the spectrum consists of electromagnetic waves with frequencies higher than those that humans identify as the color violet.

UV light is found in sunlight and is emitted by electric arcs and specialized lights such as black lights. As an ionizing radiation it can cause chemical reactions, and causes many substances to glow or fluoresce. Most people are aware of the effects of UV through the painful condition of sunburn, but the UV spectrum has many other effects, both beneficial and damaging, on human health.

How does UV light kill microorganisms?
UV light of a specific wavelength is destructive to the DNA of microorganisms and so inhibits their reproduction.

Titanium Dioxide (TiO2) is a natural cleaning material that becomes active when exposed to UV light (less than 380nm). Under the influence of UV light, TiO2 decomposes organic material (Harmful odors, bacteria) in a process called oxidation. During this process TiO2 emits charged molecules that bond with harmful substances and converts them to harmless H2O and CO2.