There are two types of water purifiers available: the storage type and the direct flow type.

The storage type simply requires you to fill the top container of the purifier with water directly from the tap and then get water as and when required. The direct flow type does not require storing the water. One can directly open the tap and get filtered water.

The Storage type of filter can be good for places facing water storages. The Direct Flow Type saves you the hassle of storing water.

This refers to the amount of water one can store in storage type purifiers.

A higher storage capacity water purifier would be useful to you if you are a large member family or if you face frequent water storages.

This refers to the total number of purification stages the water goes through.

A higher number of purification stages would ensure safe drinking water.

A micron prefilter is designed to remove silt, dust and dirt particles from the water before it enters the main filter of the unit.

There is a special multilayer micro porous candle filter to remove all suspended impurities.

The candle-filter ensures clean drinking water.

The water that has passed the pre-filter purification stage, now goes through this stage.

There is a carbon chamber in the main unit, which contains SIAC (Silver-Impregnated Activated Carbon) granules. The activated carbon removes bad odour and frees chlorine from the water.

This purification stage helps in giving germ free, clear water.

The Ultra Violet rays from the sun are the best method of purification. The same UV rays are emitted in this unit by a sophisticated lamp in calculated quantities.

Any organisms that have escaped the previous stages of purification are taken care of here.

This method kills all water-borne, disease causing organisms and gives pure drinking water. This method does not add anything to the water, nor does it remove any minerals from it.

A water purification process that removes dissolved solids from water by using pressure to force water molecules through a semi permeable membrane.

This process is called Reverse Osmosis because the pressure forces the water to flow against natural osmotic pressure.

Typical processes might be in directed way, polishing water where impurities are concentrated resulting in a purer water. Reverse Osmosis is said to be the most superior of water purification system.

The other methods of purification are Health and taste Cartridge/ Bacteriostatic Carbon and Water scanning.

The Health cartridge contains special imported resin that disinfects the water from disease causing bacteria and viruses, thus making it hygienically clean. The taste cartridge contains ion exchange resin mixed with silver impregnated activated carbon, which absorbs from water, elements such as excess chlorine and impurities like pesticides, herbicides, which impart bad odour, taste and colour to the water.

These purification methods ensure bacteria free, clear drinking water.

The amount of power consumed (in watts) that the UV lamp inside the water purifier consumes during one hour of operation. To calculate the amount of power consumed by your water purifier UV lamp, divide the power consumption in watts by 1000. Multiply this number with the number of hours you plan to use the water purifier in a month. This is your electricity consumption (in Kilo Watts) per month. Multiply this by Rs. 5 (approximate rate for residential areas) to get your monthly electricity bill.