How do you know when to run this if you do not leave on all the time without shutting off? in replacing the cartridge you stated that it typically gets replaces every 4yrs if you use it 40 hrs a week. I am not sure I understand how you calculate 40hrs a week? Do you only use it a few hrs a day? I have purification system that does not require any cartridge changing at all and it stays plugged in all the time. Had it for about 6 yrs now. I don't understand how this product would be beneficial if not on all the time. Please explain as I am looking for another system for another area of my home and this can potentially work but have a few more questions before making my decision
Michele K. asked on Feb 13, 2013
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tony R. from Groupon replied on Feb 13, 2013