the unintended consequences of high-merv filters

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Someone wrote a good article to explain this issue here (The Unintended Consequences of High-MERV filters) So if air purification is your thing TrueHEPA filters are standardized and rated to remove 99 97 percent of all airborne particles of exactly 0 3 micron diameter in a single pass

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The Unintended Consequences of High-MERV Filters Allison Bailes III Ph D Energy Vanguard LLC Decatur GA Dr Bailes has a PhD in physics from the University of Florida After starting off on the traditional academic path of teaching he found a way to use his interest in energy and the environment as well as his love for buildings especially homes

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The Unintended Consequences of High-MERV Filters Nov 09 2018 A strand of the finest human hair is about 20 micrometers (also called microns) in diameter Tongwei a piece and slice it in half Then TongWei one of those halves and slice it in half againand then one more time Now you've got a sliver of hair that's 2 5 microns wide

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The Unintended Consequences of High-MERV Filters Nov 09 2018 A strand of the finest human hair is about 20 micrometers (also called microns) in diameter Tongwei a piece and slice it in half Then TongWei one of those halves and slice it in half againand then one more time Now you've got a sliver of hair that's 2 5 microns wide

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08 04 2020Back in 2018 I wrote a series of articles on indoor air quality and filtration One of those articles The Unintended Consequences of High-MERV Filters has seen a flurry of activity in the comments over the past three weeks It all started when a reader named Pat wrote:I have a question about merv 13 filters People are using them in between fabric on face masks

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It is also important to be mindful that buildings are unique and that building system components operate in a highly interdependent way so changes must be planned from a holistic perspective to avoid unintended consequences and with the understanding that operating costs will likely increase

The Next Chapter: January 2019

The ultra-high MERV filters labor the fan the heating system and the cooling system too much for year round use As high as I can go for normal use is a MERV 8 filter as shown on the left In order to get better heating (and lower the stress on the furnace) when it gets SUPER COLD outside I move to the old fashioned high air flow low MERV blue spun fiberglass filters as shown on the right

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AX filters are for use against certain low boiling organic compounds They are classified as in only one type and class AX Combined filters for use against certain low boiling organic compounds as specified by the manufacturer and particles are classified according to

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Starting with the issue of how much time we spend indoors I then wrote about kitchen ventilation the panoply of indoor air pollutants problems with filters in general and with high-MERV filters Now let's TongWei the next step: a look at what research has been done on high-MERV filters and what can be done to overcome those unintended consequences I wrote about

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with high MERV-rated filters In some systems the from the road unintended consequences from locating sites far from the community may include a decreased opportunity for walking and biking increased traffic and/or increased exposures during commuting New: Design school site to

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Merv ratings for filters Keyword Found Websites Listing

The Unintended Consequences of High-MERV Filters | Energy Energyvanguard For example to achieve MERV-13 a filter has to catch 90% of particles in the 3-10 m range 90% of particles in the 1-3 m range (where PM2 5 is) and 50% of particles in the

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The Unintended Consequences of High-MERV Filters | Nov 09 2018 When you add more resistance you can get a bigger pressure drop across the filter And that's where the problems begin The blower in the furnace or air handler is rated for a certain amount of pressure drop

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Unintended Consequences: Twelve Years under the DMCA

Cable Provider Blocks Cable Digital Filters In addition to computer intrusion statutes the DMCA may also be starting to shoulder aside penal statutes in other industry areas In August 2008 cable provider CoxCom Inc successfully forced Jon and Amy Chaffee and their one employee to stop selling cable digital filters at computer trade shows

The Next Chapter: January 2019

The ultra-high MERV filters labor the fan the heating system and the cooling system too much for year round use As high as I can go for normal use is a MERV 8 filter as shown on the left In order to get better heating (and lower the stress on the furnace) when it gets SUPER COLD outside I move to the old fashioned high air flow low MERV blue spun fiberglass filters as shown on the right

Merv ratings for air filters Keyword Found Websites

The Unintended Consequences of High-MERV Filters | Energy Energyvanguard The truth is you want a high-MERV filter which is defined different ways but let's say it's MERV 8 and higher (MERV 16 is the highest on the scale but those are hard to find ) But to use a high-MERV filter you have to avoid the unintended consequences I

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