From the Blog · College Grove, TN
Pollen Season in College Grove: Your Home's Air
College Grove sits in some of Middle Tennessee's heaviest pollen country, with oak, cedar and grass pollen rolling across open farmland for weeks each spring. Your HVAC system is the one appliance that moves all of your home's air, many times a day. With the right filter for your blower, a clean duct system and the doors of your system sealed up, it becomes your best pollen defense instead of a distribution network.
Filters: the grade matters, and so does the fit
A higher MERV rating catches finer pollen, but a filter that is too restrictive for your blower starves airflow and can freeze a coil. The sweet spot for most homes is a quality pleated filter the system was designed around, changed monthly through pollen season here, not on the three-month rhythm printed on the package. We match filter upgrades to blower capacity on our indoor air quality visits.
The supporting steps
Keep the outdoor unit clear, because a coil matted with pollen and cottonwood makes the whole system work worse. Consider duct cleaning if your ducts carry years of buildup that re-seeds the air. Run the fan in a circulation mode on the worst days only if humidity allows; in our climate, constant fan can re-add moisture from a wet coil, which is why we set this up case by case.
When pollen is not the whole story
If symptoms stay bad indoors with good filtration, look at humidity and duct leakage pulling attic or crawlspace air into the system. Those are the two hidden causes we find most in College Grove homes, and both are fixable once measured.