Learn About Air Purification and Filtration

Who Recommends MERV 13 Air Filtration?

February 28, 2019 |

When most air filter professionals are asked to give information on what particles certain filter ratings/MERVs catch they refer to fractional efficiency curves or charts that show a particle size in microns on one axis and a removal percentage on the other axis.  For ...

If We Rated Cars Like Air Filters

August 03, 2018 |

ASHRAE 52.2 gave us the Minimum Efficiency Reporting Value (MERV) for air filters, creating a 16-point chart that tells us what percentage of particles in a certain size range will be removed by a filter.  This system was an improvement when it was introduced in 1999 ...

MERV 8: The Most Common Filter in The United States

June 05, 2017 |

The MERV 8 pleated filter is the most commonly used air filter in the United States.  Possibly a better way to say this is the 2" deep pleat is the most commonly used, as manufacturers continue to take advantage of the ASHRAE 52.2/MERV testing system and now many of ...

Air Filter Battle: Ring Panel vs FARR 30/30 Medium Efficiency Filters

April 21, 2017 |

Most of us don't give much thought to our MERV-8 or MERV-10 prefilters, most of still change them on a schedule every 3-4 months, but these filters do impact a building's energy consumption in a big way.  So how do different styles of air filters increase or reduce ...

MERV 8 and MERV 10 Comparison

April 17, 2017 |

There is a battle among pleated HVAC filter manufacturers - MERV-8, MERV-9, and MERV-10  Which is "best" for your facility and how different are these prodcuts really, seeing as not too long ago they were all MERV-6 or 7?  Frustratingly with ASHRAE 52.2 and the MERV ...

95% Air Filter, MERV-14, MERV-15, or MERV-16 - Yes?

April 10, 2017 |

 Oh MERV, if there were any clearer reason why you are going to be replaced byISO 16890, it is the confusion of 95% air filters.  A still common specification for final filters in hospitals the 95% filter could refer to MERV 14, MERV 15, or MERV 16 high efficiency air ...

What MERV Filter Do I Need?

February 24, 2017 |

One of the most common questions we get is asked a variety of ways:           How much MERV is enough?           What efficiency filter should I use?           Isn’t 8 enough? As is the case with most questions like this, the answer is: It depends.  To come to an ...

MERV/ASHRAE 52.2 Vs ISO 16890 Efficiency Charts

February 24, 2017 |

One of the more common requests we get is to do a cross between different filter test methods.  For years it was a 52.1 to 52.2 cross, then when Europe adopted EN779 charts crossing those two came about now with the adoption and publication of ISO 16890 we are being ...