Clear Advice for Cleaner Air
Your furnace runs almost nonstop once the temperature drops, and every bit of air it moves has to pass through one small part first: your filter. A clogged winter HVAC filter does not just make your system work harder. It can raise your energy cost every month until you swap it out. We have seen … Read more
A standard furnace filter doesn’t kill germs. It traps the particles that those germs ride on, and only if the rating is high enough. The MERV (Minimum Efficiency Reporting Value) number printed on the side of your filter is what decides whether that trapping actually happens. We’ve answered this question for thousands of homeowners, and … Read more
Run a finger across a shelf two weeks after installing a fresh 24x25x5 MERV 8 filter in a Day and Night cabinet, and you’ll feel the difference. Run it in the same spot six months later with the same filter still seated, and the dust is back — along with a blower working harder than … Read more
The most common furnace filter mistake isn’t skipping a replacement — it’s installing the new one backward. We see it across the homes we evaluate: a well-chosen filter seated in the wrong direction, working at a fraction of its rated efficiency while the system runs just fine. The homeowner has no idea. A correct installation … Read more
At FilterClarity.com, we have seen that homeowners often assume one night without a furnace filter is harmless, but even a short stretch can allow dust, lint, and airborne debris to move directly into the system instead of being captured where they should be. In our experience reviewing common airflow and filter-related problems, the bigger issue … Read more
In a pre-2010 HVAC system with a fixed-speed blower motor, a 22x22x1 MERV 13 filter can behave like one that’s already half-clogged—from the moment you install it. The system runs longer to reach temperature, the energy bill climbs, and the air quality improvement—while real—costs more to deliver than most homeowners expect. Here’s what most filter … Read more
During Nashville’s January 2026 ice storm, more than 20 people showed up at emergency rooms with carbon monoxide poisoning in a single 24-hour stretch. Most of them had done exactly what you’d expect when the power went out: fired up a generator, closed the doors against the cold, and waited for the heat to kick … Read more
Pull a gray 21.5x24x1 filter from your return vent and the temptation makes sense. Rinse it off, let it dry, slide it back in, save the cost of a new one. We’ve run this test at FilterClarity.com more times than we’d like to count. The filter goes back in looking usable and immediately stops working … Read more
Pull up Stockton’s AQI on a July afternoon and you might see a number that changes your plans entirely. Wildfire smoke rolling in from the Sierra Nevada foothills can push that reading from Moderate to Unhealthy within a few hours, with almost no warning. San Joaquin County holds a federal nonattainment designation for both ozone … Read more
Most Nebraskans check the weather before heading outside. Fewer check the AQI. That gap matters more than most people realize, especially from June through October, when wildfire smoke drifts east from the Rockies and agricultural burns push PM2.5 levels well above what a standard MERV 8 filter can handle. At FilterClarity.com, we track regional air … Read more