Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: I am now reading more up on this after I purchased the unit. Is this a true HEPA air purifier and does it emit OZONE? I read that Ionizers emit ozone!
Document: This is the 2nd time I purchased this air cleaner. It is wonderful to keep the air fresh in whatever room you wish. Helps with sinus troubles and allergies...can't say enough good things about having this in any home. Just remember to keep the charcoal filter fresh and change the Hepa filter when the indicator light comes on. I have been using HEPA air cleaners for years and cannot be without them.
It filters the air, has a five year warranty, and works well in a large bedroom. I live in the desert, and dust is a big problem (even keeping the A/C on all summer and using HEPA A/C filters). This portable unit works very well as a second line of defense. The first filter (the charcoal filter) is of questionable value, however.
I purchased this unit as an addition to my psychology waiting room. One of the benefits of running this unit on level 3 (high) is that it makes just enough white noise to muffle the sounds of patients in the examining room. Some psychologists use a special white noise generator - now I can reduce dust in the air and create some privacy. I have run the unit often, and have had no problems whatsoever. I do run the ceiling fans, though, to create more airflow.Bruce Borkosky
This is an upgraded version of my Hunter Air Purifier that I purchased at SAMS 10 years ago. It is EXCELLENT. It is also very quiet and needs only to have the filter replaced or cleaned each fall or spring. You can really tell the difference in air quality with one of these products.
This air purifier works pretty well. The way I know this is that I look at the HEPA filter and it's already dirty - not enough to change but I can tell it's working. It's pretty quiet and I even like the noise it does make. I would recommend this to help you breathe better at night. It has helped me.
Have purchased Hunter air purifiers in the past. This purifier is terrific and is set up in my den. Air is fresh (on med or high...low is very quiet and does not produce much air). It is somewhat similar to having a fan in your room except that it is really cleaning the air. It smells so fresh. I love it. Will be buying another Hunter (though a bit smaller) for my bedroom.
I cannot believe what a great job this air purifier does. It is so quite that you forget that it is there. I have asthma and purchased this hoping it would help. At first I thought that it was not working but gradually I started feeling better and the dust (I live in a leaky old house)has gradually dissapeared from the living area. The only drawback is having to clean the filters often but that is easier than dusting ceilings!
I am very satisfied with the Hunter 30378 Air Purifier. It does what it claims, catches an amazing amount of dust and pet hair. Easy to clean, I vacuum out the carbon filter weekly, and change the HEPA filter about every 2-3 months. Yes, replacement HEPA filters cost money, but you can find them for reasonable prices if you look around on the net. Dust and dander have gone way down, and, contrary to other reviews, carbon filter does work well with odor removal.
I got it (Nov 2012) for a good price and once I read the manual as to how to read the control panel, it was easy to run. I researched this unit to make sure about the cost of replacement filters. I can get replacement filters as well as prefilters for a good price for it at my usual filter replacement store "filtersfast.com" It runs quietly and has a nice clean look to it. I will repost if I have any trouble with it over the coming days.
we bought this unit because our son has some allergies. after using it, it seems he has gotten better but when you turn this on from 2-3 on the fan, it's like you're sitting in a AC unit. it's pretty noisy, but i guess this is the price you'll have to pay for better health.read jerry bond's review to save some $ on the filters which cost an arm and a leg.
Answer: I own this and have for almost a year--we really like it! It's a true Hepa filter but I don't believe it emits ozone. I've had filters that do that, and there's always a strange smell....this is a great one