I had an economizer added to my HVAC system last fall, which is fantastic for cooling my second floor down in the evenings during the shoulder seasons where the weather is cool in the late afternoon through the night and I don't want to pay to run the AC.
However, this is my first spring with it and I have discovered that the MERV 13 filter that is in my HVAC system seems unable to filter out enough pollen to prevent me from having major allergy attacks all night.
Is there a filter system I could install that would be able to handle 800 CFM of outdoor air and filter out the pollen enough that I can breathe?
Best Answer
A MERV 13 filter should not let much if any pollen get through. If you still have pollen getting past, it is likely leaking around the filter.
I would check that the filter is secured tightly in the HVAC system and that there is no place for air to bypass the filter.
To increase filtration of existing plain filters, you can also spray it with a tackifier. The tackifier will catch particles small enough to bounce off the filter fibers but pass between the fibers.