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PM 2.5

The killer that can’t be seen.

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We spend 90% of our time indoors.

Indoor Air Quality is 5 to 10 x worse than outdoor air quality. PM 2.5 can’t be seen and results primarily from combustion.

Chicagoans spend 90% of their time indoors were air quality is > 5x worse than outdoor air quality.     
Among major US cities, Chicago with others rank in the highest category of PM 2.5 concentration.  PM 2.5 (“particulate matter 2.5 microns”) has been linked to morbidity and cannot be seen by the naked eye.  PM 2.5 primarily results from combustion.  
Every Passivhaus Institut Certified Building requires a whole-house ERV to provide “continuous balanced mechanical ventilation with energy recovery.”
Ellis Passivhaus uses a Zehnder ERV that removes 90% of particulate matter greater the 1.0 microns and 75% that is < 1.0 microns.  It runs 24/7 at 84% efficiency and uses < 2 kWh per day of electricity.
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PM 2.5

The killer that can’t be seen.