medpal said:
from the links you have provided it works on the principle of Ultra Filteration which has a such tiny filter membrane that it filters out the germs.
This is not correct. Pureit is much more than a simple filtration apparatus. It has in addition to the filtration step, a carbon filter which removes all soluble organic impurities such as pesticides, a germkill active which kills all germs and finally a last polishing filter which removes any residual impurities and leaves the water tasting great.
If you look at the permionics product, the eact same steps are followed in that product as well. The quality of output water is EXACTLY the same in the two cases. The difference is that the membrane filter in Permionics lasts a lot longer ( and hence the device at RS 6000+ is a lot more expensive).
As far as recurring costs are concerned let me assure you there is NO activated carbon technology in the world that can be used infinitely. The activated carbon has 'active' sites that capture impurities. It is possible to regenerate some of them through backflushing etc. but it IMPOSSIBLE to regenerate activated carbon completely. This is the reason the eureka forbes purifiers need the carbon filter to be repalced periodically. So for a fair comparison, please include the cost of replacing the carbon filter in the permionics device. If you have not done so in three years, I suspect that either
a) Your supply water is great,
b) You have been not removing soluble organic impurities at all!
medpal said:
but as the operating cost goes :
300 Rs. for replacement of the battery (so called Germkill function) at every 1500 liters of water.
that means you have family of 4 and 4 liters of water per day per head its 16 liters a day considering that 480 liters a month.
lets round it to 500 liters a month.
so in a year you need to change that filter kit 4 times that 1200 Rs. a year.
i dont see great VFM there
Again lets do the math. A pureit comes with one germ kill filter.In a year with three replacements, that RS. 2700. Even after another three years, it is still cheaper than the permionics unit. And as I have stated, at that point the permionics unit would need a carbon change too. Also if you folllow through with the math the cost per litre of cleaned water comes out to be 20paise per litre (if you include only the cost of the germkill battery), or 30 paise per litre if you include the cost of the unit too over the life of the device.
Please look at
About Pureit | Affordable Price
to get a good idea as to where pureit stacks up in terms of VFM to other options.
I believe that 1800 rupees to begin with and then 300 rupees every three months is affordable to the aam aadmi and to a lot of people (compared to 6000+ rupees up front AND recurring costs in AMCs, consumables etc)
Also for those who are not aware of 'hidden' costs, the webiste mentions the replaceable battery clearly and if you contact the sales representative who will visit your home for a demo, this is explained very explicitly.
Lastly as medpal himself says it is not a battery in the conventional sense. It is a cartridge that contains the germ killing active and there is no electricity involved.
The reason I felt it was necessary to post this is that medpal is a learned and respected individual on these forums and his words carry much weight. That fact that this comes from him would be enogh for a lot of people to make up their minds.
In this case though, I felt he did not have the correct picture and people would get the wrong idea.
I realize that my views could be considered biased. Hence, i would suggest people to do their own research. Speak to people who are using Pureit and other devices. Get their feedback. If possible try and experience these products. In the case of Pureit you could even call the Pureit guy to your house, take a demo and convince yourself.
I think that all of these devices work quite well. Any device is better than no device at all. So please make an informed choice.
Medpal, I respect you as I have seen many informative posts from you on these forums. I hope you will not take this the wrong way. My intention is not to offend but inform.
hyeah:] although they were into the mkts for a long time.
