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  1. #1
    Join Date
    Feb 2014
    Posts
    2

    Question Choosing the correct HVAC filters, MPR / MERV #'s

    We recently moved into our home in Waxhaw, NC. We want to replace the HVAC filters but aren't certain which kind to get. We currently have MPR 1900 (12x12x1 & 14x25x1). We've been told everything from: use the cheapest throw-away filters / replace them monthly, to nothing better than MPR 1500 as it would put too much strain on the blower motor. Help?

  2. #2
    Join Date
    Jul 2010
    Location
    SoCal
    Posts
    7,762

    Default Re: Choosing the correct HVAC filters, MPR / MERV #'s

    No matter which air filter you get, make sure you have a clean filter in your a/c unit at all times.

    The filter stops dust and other particles, to provide you and the a/c unit with clean air. So depending on your needs, budget, a/c-heating usage or ease of replacement, choose the one filter that's best for you.

    Remember: A dirty filter endangers your health and can cause your a/c unit mechanical problems that can lead to a total failure. You don't want neither one to happen.

    If you are on a budget and for some reason you need to replace filters often (for example you live in a windy area), consider a washable filter, good for 4-5 changes. Check it periodically, rinse it, let it dry and put it in the unit.

    Another consideration is the space you have in your unit. Some filtesr are thick, and will not fit into the space in your unit.

  3. #3
    Join Date
    Feb 2014
    Posts
    2

    Question Re: Choosing the correct HVAC filters, MPR / MERV #'s

    Thank you for your response but I think I need to add some more information to the question. My HVAC unit does not have a filter directly in it. It uses 3 filters (1.-12x12x1 filter in the master bedroom; 1.-14x25x1 in the main hallway on the second floor and 1.-14x25x1 filter on the main floor.

  4. #4
    Join Date
    Jul 2010
    Location
    SoCal
    Posts
    7,762

    Default Re: Choosing the correct HVAC filters, MPR / MERV #'s

    The exact locations of your filters is not that important - they are all located between the unit and the returns, as long as you have an easy access to them for the purpose of replacing them periodically.

    Many homeowners neglect to change filters, and for some, the reason is "too difficult to reach". Then, when the unit fails (usually when they need it the most), it's kind of too late.

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