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Air Purifiers

Post in 'DIY and General non-hearth advice' started by New Fire Guy, Dec 27, 2010.

  1. New Fire Guy

    New Fire Guy Member

    Joined:
    Nov 26, 2010
    Messages:
    32
    Loc:
    Burlington, CT
    Anyone familiar with air purifiers for the home? Any recommendations on makes/models?

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  2. maverick06

    maverick06 Minister of Fire

    Joined:
    Sep 27, 2008
    Messages:
    704
    Loc:
    media, pa
    OK, I just went through this.... will try to save you some time while biasing you with my opinion.....

    I wanted a air filter. I am always paranoid with wood smoke/ash (even in tiny amounts), my wife has bad allergies, we have a cat, and a little one on the way. So I wanted a air purifier, even if it is just a placebo effect.

    1) those ionic filters produce dangerous amounts of ozone, and dont filter worth poop. Skip them!
    2) the onyl filter worth anything is a hepa filter
    3) filters are expensive to replace, and you know you wont do it on time. Some purifiers have lifetime filters, you can just vaccuume them out (guess you should do it outside).
    4) look at the area you want to keep clean. size the purifier correctly! I bought a large purifier for a pretty small area, this way I can run it on low. If you get a purifier that can clean X sqft and put it in a X sqft room, then it needs to run full tilt!A big purifier running on low will probably be quieter than a small one on full power.

    I ended up getting a honeywell 50250

    [​IMG]

    http://www.amazon.com/gp/product/B00007E7RY/ref=oss_product

    There is a really detailed review, with lots of tech specs on amazon, her eis the link to it: http://www.amazon.com/review/RPK089GRGVMP9/ref=cm_cr_pr_viewpnt#RPK089GRGVMP9

    thats where I bought it. I am pretty happy with it. There isnt any dust in beams of sunlight anymore. I also looked at the black pre-filter, after 3 weeks its pretty grey. So it clearly pulled some nasty stuff out of the air, every bit of dust that goes in ther eis great, because it is better than going into my lungs (I am saving them for the asbestos in the cube farm at work).

    Here is how much power it consumes, I measured with my kill-a-watt.

    high - 175 watts
    medium - 121 watts
    low - 83 watts (24/7 at my electricity rates, this is about $9/month)

    All air purifiers will make air noise, on low this one is pretty quiet. Some people report that the prefilter smells for a little while after you open the package. Mine didnt, but open it in the garage if you are concerned. I would deffinitely reccomend it!

    Hope that helps,
    Rick
  3. flyingcow

    flyingcow Minister of Fire

    Joined:
    Jun 4, 2008
    Messages:
    2,309
    Loc:
    northern-half of maine
    we got the same kind. Like it. Agree with everything you posted. Replacing filters will cost more than the machine sometimes. Our unit is in bedroom where i sleep. Great "white" noise, as i go to bed early, family tries to keep the noise down. Put the unit on medium, and I'm out like a light. Don't hear a thing. ALSO, no dust in the sunlight either!
  4. benjamin

    benjamin Minister of Fire

    Joined:
    Nov 7, 2009
    Messages:
    695
    Loc:
    SW WI
    For removing smoke particles and any other fine dust, you can't beat an electrostatic precipitator type filter that's made to go in the furnace ductwork.

    I've been using one I found used, and it does spark like a bug zapper when it gets dirty or after I wash it, but it only uses 16 watts, has extremely little resistance to airflow and the water looks like axle grease when you hose the filter sections off. It does produce ozone smell sometimes also.
  5. Later

    Later New Member

    Joined:
    Jan 30, 2009
    Messages:
    456
    We had a Trion electrostatic on our furnace and replaced it after a few years with an Aprilaire HEPA filter - seems to work better than the Trion. We do run the furnace fan 24/7 and change the filters every two to 3 months. It does get pricey, but works well.
  6. maverick06

    maverick06 Minister of Fire

    Joined:
    Sep 27, 2008
    Messages:
    704
    Loc:
    media, pa
    The hvac guy I know says the furnace filters really just protect the heat exchanger and dont effect your house air much..... I am not sure how much I believe that, i run a good washable filter in mine.

    Watch out for those ozone/electrostatic filters. They do not get good ratings for CADR (clean air delivery rate). And the levels of ozone can bee undesirable (i wont say dangerous), but ozone isnt your friend when it is in your house. This isnt regarding the hvac electrostatic stuff, I am talking about the standalone units. Consumer Reports states that they emits unhealthy ozone (not sure if it is an unhealty amount of ozone though).

    Just be careful, read the reviews on amazon before you buy (even if you dont buy from amazon).

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