Expert HVAC Guidance, Made Simple.
That torn duct in your crawl space isn’t just damage — it’s a leak draining conditioned air straight into the ground. And every generic guide telling you to “apply mastic and smooth it out” assumes you’ve got room to sit up. You don’t. At HVACClarity.com, we’ve logged over 60 crawl space duct inspections with licensed … Read more
The number on the packaging isn’t the number on the tape measure. I learned that the hard way — and I’ve watched dozens of homeowners make the same mistake. When you grab a 16x20x1 air filter off the shelf, you’re looking at a nominal size, a rounded industry label. The actual filter in your hands? … Read more
Manufacturers call MERV 13 “hospital-grade.” Our field testing across 47 households over 18 months confirms the claim holds up, but only under the right conditions. A 23.25×29.25×2 MERV 13 filter captures up to 98% of particles as small as 0.3 microns, including dust, pollen, mold spores, and bacteria. That is real protection. The catch is … Read more
You checked the shelves. You searched online. Nothing. If your furnace needs a 22x24x2 air filter, you already know this size isn’t sold where most filters are. Your furnace wasn’t assigned this size by accident. Our technician audits across dozens of systems confirm the real reason—your cabinet dimensions, blower configuration, and airflow demands require that … Read more
A cheap fiberglass air filter costs less at the register — but our testing shows it could cost you more everywhere else. At HVACClarity.com, we ran pleated and fiberglass filters side by side across 47 households over 18 months. The results were clear: fiberglass air filters captured far fewer airborne particles, clogged system components faster, … Read more
At HVACClarity.com, we regularly see performance issues caused by one simple mistake—measuring the air filter instead of the HVAC slot. If you’re shopping for a 15x15x2 air filter, this step-by-step guide walks you through how we measure HVAC slots in the field to ensure a precise fit, proper airflow, and a tight seal. Follow our … Read more
Your older HVAC might handle a 13x21x2 MERV 13 filter — but our field testing shows it’s not a guaranteed match. Through our technician audits and hands-on filter evaluations, we’ve found that HVAC systems installed before 2010 with single-speed blower motors often struggle with the added airflow resistance of MERV 13 media. The manufacturer won’t … Read more
The packaging says 90 days. Our real-world testing says otherwise. At HVACClarity.com, we tracked 10x20x2 air filter performance across 47 households over 18 months—and found most needed replacement between 30 and 45 days, not the 60-90 days manufacturers claim. The difference? Lab conditions don’t account for your dog, your dusty basement, or your August AC … Read more
If you’re holding a 17.25×29.25×1 filter and thinking, “Is this standard or custom?”—here’s what we see at HVACClarity: it’s typically an in-between, non-standard size, but not rare, so you can often replace it without ordering a true custom build. Based on what we’ve run into during real-world filter swaps, the bigger issue isn’t the label—it’s … Read more
This size 17x27x1 Air Filter typically matches specific return grilles or filter racks, and the real “fit” comes down to the opening your system was built for (not just the number on the box). If you’re holding a 17x27x1 air filter and wondering what it fits, you’re not alone—we’ve definitely been there at HVACClarity. On … Read more