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HEPA air cleaners – widely used, but are they cost effective?

air purifier in india review

The first High Efficiency Particulate Air (HEPA) air purifier was designed in the 1940’s as part of the Manhattan Project – the effort to create the first atomic bomb. At the time the goal was to be able to filter out 99.97% of radioactive particles greater than 0.3 micron, and most present day HEPA air cleaners still have the same specification.
For comparison, the width of a human hair ranges from 50 to 200 microns, so 0.3 micron sounds pretty good and should keep most allergen at bay – right?

Some important points to consider
Without a doubt HEPA air purifiers are very efficient at filtering allergen such as pollen, dust, and mold spores.
However, more than 90% of all particulates are 0.3 micron and smaller in size which means that HEPA air cleaners do not remove viruses, some bacteria and germs, some house dust mite allergens, cat allergens, smoke, soot, fumes, and smog.

It should be noted though, that HEPA air cleaners do remove particulates smaller than 0.3 micron, some of them filter down to as small as 0.01 micron, but the percentage of particles removed drops of rather quickly.

If you want better performance than that with a standard HEPA air purifier, there are more expensive units on the market with exceptional performance.
For instance, the Philips 3000 Series AC3256/20 has a low noise design and a filter that will last a minimum of 5 years. Furthermore, the filter is guaranteed to capture at least 95% of all particles smaller than .3 microns, so even viruses are caught.

There are some drawbacks to HEPA air purifiers however:

  • Although a prefilter extends it’s life, regular filter replacement is required every 2-5 years.
  • Filters cost on average between Rs.4000-Rs.16000.
  • The mechanical process of moving air through a dense filter requires a large, powerful fan. That means relatively high energy requirements, and therefore a high energy bill: Rs.8000-24000 per annum.
  • Can be very noisy if run at the highest level, which would occur if the unit is undersized relative to the room.
  • Filters are extremely fragile and can be easily damaged.

Some HEPA air purifiers include other air cleaning technologies to complement the HEPA filter. 

For instance, to remove odors a HEPA air purifier could also have a gas filter made of activated carbon, potassium permanganate, or zeolite. The Atlanta Healthcare Beta 350 and the Philips 3000 Series AC3256/20 are examples of such a hybrid model.

All in all, while HEPA air purifier have some drawbacks, together with electrical air purifiers, they are for most people the best overall solutions to improving indoor air quality.

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Best Air Purifier in India in Sept 19

best air purifier in india 2019

Air Purifier help eliminate allergies, viruses or odors; but only if it’s the right size and type air purifier

It’s common knowledge that the air indoors has up to 5 times more pollutants than outdoors. And as most of us spend 90% or more of our time indoors, our bodies frequently react to the poor air quality with itchy eyes, sneezing, ear infections, throat and sinus irritations etc.

It therefore makes a lot of sense to improve our indoor air quality with an air purifier.But to find an air purifier that meets your expectations, a few things have to be considered, so let’s have a look at the most important criteria.

What do you want to solve: allergy, viruses and bacteria, or odors?
An air purifier technology is usually designed to solve only one of these problems, so it’s important that you select an air cleaner with the appropriate technology.

Allergies are caused by various types of particles, such as pollen, that have a size from about 0.3 micron upwards. HEPA air purifiers, and some ionic air cleaners can filter these type of particles very effectively.

More than 90% of all particulates are 0.3 micron and smaller in size and these include: viruses, some bacteria and germs, some house dust, mite allergens, and cat allergens.Suitable solutions would be ionic air cleaners, air purifiers with activated charcoal filters, and ultraviolet light air cleaners.

Some particles can be even smaller: smoke, soot, fumes, and smog.
These problems can be controlled with air purifiers now available online in India that have activated charcoal filters, and various types of ozone generators.

So what if you are trying to get rid of odors, but also of allergen? Well, many air purifiers combine several air cleaning technologies for this very reason, which makes them good value.

Air purification for the whole house or only for selected rooms.
A whole house air purifier would be:

  • considerably more expensive,
  • more convenient, but
  • probably not as effective as room only air cleaners.

Capacity
A good quality room air cleaner will easily set you back several hundred dollars, and would only clean one room at a time. Most room air purifiers are portable, so you can move it with you.
Make sure though, that the air cleaner has ample capacity to clean the largest room you intend to use it in, because some air purifiers can become quite noise if they have to operate at the highest setting.

Operating cost
Some air cleaners come with filters that are expensive to replace. Another thing to watch is electricity consumption.
Generally speaking, the finer the filter, the more expensive it is to replace, the more power will be required to pull the air through it, and the higher the electricity bill.

Warranty
It’s no good shelling out several hundred dollars for an air purifier only to find that you have to pay extra to have it repaired or replaced.  The more reputable the brands, the more you are assured of a proper warranty.

Brands
Look for the following quality brand names: Phillips , Honeywell , Dyson ,Atlanta,Coway, Glen Air, Kent ,Mi.

Price
Last but not least, it certainly is a good idea to shop around, and one of the neat things of doing this online is that you can compare prices from the comfort of your own home!

For your convenience we have short listed best air purifier in 2019 from different sources please check it out here https://bestntop.in/product-category/air-purifier/

Don’t forget ot check out our new article on HEPA filter based air purifer :- https://bestntop.in/2019/08/23/hepa-air-cleaners-widely-used-but-are-they-cost-effective/