How to resolve HVAC system vibrations While there are actually many pollen types, a pet in the house is often a positive source of allergens for around 20% with the population who will be allergic. It is a good motive to improve the standard of the filters you buy. Air filters are calculated in MERV ratings, which means Minimal Performance Reporting Value.Getting an air purifier will simplicity many of the stress put on your air filters. Having a HEPA purifier ensures that around ninety reference nine.ninety seven% of pet dander is faraway from the air in your household right before it at any time reaches your air filters.