RO water cooler has 4 stages of purification which consist of sediment filter, pre carbon filter, membrane and post carbon filter and it purifies any source feed of water like brackish, tap water, municipal water, bore well upto 2000 TDS and have...
HEPA air filters are made from very tiny glass fibers that are made into a tightly woven paper. This creates a filter consisting of a multitude of very small sieves that can capture extremely small particles, including some biological agents....
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