1:5:10:365 EcoTip Blog

June 28, 2008

:180 Portable Air Filtration

Welcome to today’s 1:5:10:365 Tip for becoming a better steward for our home and planet environment.

1:5:10:180 EcoTip: Portable HEPA Filtration can help reduce airborne particulates. If your home is a “Well Tuned Home” as I discussed in yesterdays post, additional spot filtration can improve indoor air quality even more.

Over the next several days I will provide tips for choosing a portable purifier.


 Additional Information:

Suggested Review: :110, :179

Yesterday I brought a portable particle counter home from work to check the airborne particle levels. This is a device that can be set to measure the quantity of different sized particles. The smoke from the California Wildfires that are burning wasn’t quite as bad as the night before, but the outdoor smoke odor was still quite pronounced. Here’s what I found when I averaged the 1 micron sized particle counts in several places:

Outdoor air – 2500 particles/cubic liter

Indoor air (most rooms) – 250 particles/cubic liter

Indoor air (supply registers) – 100 particles/cubic liter

Filtered Air (at the machine) – 1 particles/cubic liter

Indoor air (room with portable HEPA air filter) – 50 particles/cubic liter

In addition to the things I mentioned in yesterdays EcoTip (:179), we also have a 1 inch pleated MERVE 11 filter in our air conditioner (EcoTip :110). By having our home Well-Tuned and the upgraded furnace filter, the particle level inside was ten times lower than outside.

The HEPA filtration in the portable unit was filtering out almost all the particles I was measuring at the machine – which means it was working the way it is supposed to and was reducing the indoor particle level even further.

I’m unwilling to test this while the outdoor air quality is so bad, but its my guess that the most important factor in excluding the smoke has been having our home “Well Tuned”. The pleated furnace filter and the portable filter reduced it further. If the home weren’t well tuned the filtration wouldn’t be able to keep up.

Over the next several days I will be talking about other factors to consider when choosing and setting up a portable filter or purifier unit.

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1 Comment »

  1. I was thrilled to find the filter I needed for my home air cleaner
    . I live in the desert and a good air cleaner is necessary with all the pollens that we get from the weed growth around the home. They had just what I needed! Thank You!

    Comment by anonymous — June 12, 2009 @ 10:04 am

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