07/19/2026
Cleaning post of the week: Filter reminder: Go change it!
If you're in Pittsburgh, I'm sure you're relieved that the air advisory has been lifted! I know I am. However, this may have caused your furnace filter to get even dirtier than usual with the smoke in the air, as bad as it was. This was even on the news - so please go check your furnace filter!!
They should be replaced every 3 months anyway. I mean you might get away with 6 months depending on how often you run things.
Be sure to label the side with the date you put it in, using a marker.
There are different levels of filtering things as well - be sure to read the packages when purchasing your filters.
For further info - from google:
Furnace filter levels are measured on the MERV scale (Minimum Efficiency Reporting Value) from 1 to 16. For most homes, a MERV 8 to MERV 13 filter is optimal. This range effectively balances capturing common allergens like pollen and dust with allowing proper airflow to protect your HVAC system. The appropriate filter level depends on your specific household needs and HVAC system:
MERV 1–4: Basic protection. Captures only large particles like carpet fibers and dust mites. Best for budget-conscious homes with no allergies.
MERV 5–8: Standard residential protection. Traps pollen, dust, and lint. A great all-around choice for standard furnaces.
MERV 9–12: Improved allergen control. Captures smaller particles like pet dander and mold spores.
MERV 13: Superior filtration. Effectively captures smoke, bacteria, and virus carriers. Ideal for families with asthma or severe allergies.
MERV 14–16: Hospital-grade filtration. Most residential HVAC systems cannot accommodate these, as the dense material restricts airflow, causing system strain.
Always check your specific furnace manufacturer's guidelines, as using a filter that is too dense for your system can cause the blower motor to work too hard or fail prematurely. For a deeper dive into particle size and efficiency, refer to the US EPA MERV Rating Guide.
