Yoor Air FAQs
Furnace Filter Questions Without the HVAC Bullsh*t
Furnace filters shouldn't be confusing. You shouldn't need an HVAC certification to figure out your size, understand MERV ratings, or know which direction the little arrow points. So we made this easier. Find your question below, get a real answer, and go back to ignoring your furnace like a normal homeowner.
Filter Sizes & Fit
What size furnace filter do I need?
Start with the size printed on your current filter. You'll usually see three numbers like 16x20x1 or 20x25x1 — nominal width, height, and depth. But don't blindly trust an old filter if it fits like garbage. If it wiggles or leaves big gaps, measure the filter slot too. A filter that almost fits almost works.
What's the difference between nominal and actual filter size?
The nominal size is the rounded-up size you find when shopping, while the actual size is what the filter physically measures. So a filter labeled 20x25x1 is typically 19½x24½x¾. That difference is normal, but it matters when you're trying to fill a slot properly. We told you size matters.
Should my furnace filter fit tightly?
Your filter should fit snugly without needing to be crushed, bent, folded, or introduced to your furnace with a rubber mallet. Too loose and dirty air can sneak around the sides. You want a secure fit without giant bypass lanes around the frame. Tight where it counts.
What is bypass air?
Bypass air is air that travels around your furnace filter instead of through it. Think of it as a dust express lane your filter forgot to close. Unfiltered air is MERV 0. A proper fit helps reduce bypass so more air actually passes through the filtration media.
How do I measure my furnace filter?
Remove the old filter and measure its width, height, and depth (all of our filters are 1 inch only — they work great in larger filter tracks). You can also measure the inside of the filter slot if the old filter doesn't fit well. Don't guess your size. This isn't the time to freestyle.
Choosing Your Yoor Air Filter
Which Yoor Air filter should I buy?
We keep this pretty simple. Pure is our MERV 7 everyday filter for normal household dust, lint, and pollen. Pure Plus is our MERV 8 filter for homes dealing with more dust, pet hair, and dander. Pure Carbon is our MERV 9 filter with bonded carbon for pets, cooking, smoke, and everyday household odors.
What's the difference between Pure, Pure Plus, and Pure Carbon?
Pure is a MERV 7 filter that handles everyday household filtration with responsible airflow. Pure Plus steps things up with MERV 8 filtration and a Supertack tackifier that grabs even more of the nasties. Pure Carbon adds MERV 9 filtration plus 2 layers of bonded carbon to help absorb odors. Three filters. Three levels of protection. Zero floppy cardboard energy.
Which Yoor Air filter is best for pets?
Pure Plus is a great starting point for homes with pets because its MERV 8 media helps capture pet hair, dander, dust, and pollen. Got pets plus odors? Go Pure Carbon. Because sometimes filtering the dog dander isn't enough. You've also got to filter the evidence.
Which filter is best for household odors?
Pure Carbon is the move when household odors are part of the problem. Its 2 layers of bonded carbon are designed to adsorb everyday smells from pets, cooking, smoke, and household chemicals. Regular filtration gets the junk. Carbon goes after the funk. Cute little power couple.
MERV Ratings & Filtration
What does MERV mean?
MERV stands for Minimum Efficiency Reporting Value. It's a rating system used to describe how efficiently an air filter captures particles of different sizes. Higher ratings generally capture smaller particles, but you still need to consider airflow and your HVAC system.
Is a higher MERV rating always better?
Nope. A higher rating can capture smaller particles, but higher filtration can also create more airflow resistance. Your furnace doesn't need the filtration equivalent of breathing through a couch cushion. Choose a filter that balances particle capture with healthy airflow.
Do furnace filters remove dust?
Dust is small, but most of it is “big” in terms of filtration. As your HVAC system circulates air, the filter captures airborne dust moving through the system. It won't eliminate every speck because dust is apparently immortal, but regular filter changes help keep more of it in the filter — not on your TV stand 11 seconds after you dusted it.
What does carbon do in an air filter?
Carbon adsorbs odors and certain gaseous contaminants as air passes through the filter. Pure Carbon uses 2 layers of bonded carbon so you get odor control without loose carbon material that can shed, settle, or create restrictive dead spots. Your filter shouldn't solve one mess by making another one.
Pets, Allergies & Odors
What furnace filter should I use if I have pets?
For pet hair and dander, Pure Plus is a solid choice thanks to the Supertack adhesive that grabs on for dear life. For hair, dander, AND pet odors, Pure Carbon adds 2 layers of bonded carbon into the mix. Cats, dogs, or whatever fuzzy creature has claimed your furniture — we've got the evidence covered.
How often should I change my filter if I have pets?
A good starting point for homes with pets is around every two months. Homes with several pets, heavy shedding, or stronger odors may need replacement every four to six weeks. Check the filter regularly because your Labrador does not care about your replacement schedule.
Can an HVAC filter remove pet smells?
Regular particle media isn't built specifically for odor control, but Pure Carbon uses 2 layers of bonded carbon to adsorb pet odors passing through your HVAC system. Because sometimes the dog is adorable. The smell is not.
Can an air filter help with cooking odors?
Pure Carbon can adsorb some cooking odors as air circulates through your HVAC system. It won't undo whatever happened to those onions, but it can help with the aftermath.
Installing Your Filter
How do I install a furnace filter?
Turn off your HVAC system, remove the old filter, find the airflow direction, and point it toward the furnace, air handler, or blower. Slide the new filter into place, make sure it fits securely without crushing the frame, and turn the system back on. Done. You just performed HVAC maintenance without calling Gary.
Which direction should the arrow point on my furnace filter?
The arrow should point in the direction the air is moving. In a typical furnace setup, that means toward the furnace, blower, or air handler. The arrow isn't decorative. Follow it.
Why don't you have an arrow on your filter?
We have nowhere to print an arrow on the edges of our filters. Which is why they are color coded! The air-exit side is Blue on Pure, Green on Pure Plus, and Black on Pure Carbon. Install so that color faces toward your system. Easy peezy!
What happens if I install my filter backwards?
The filter may still catch some particles, but it won't perform the way it was designed to. The media matrix filters from largest to smallest particles and is built around a specific airflow direction. Flip it around the correct way. Nobody needs backwards-filter energy.
Should I turn my furnace off before changing the filter?
Yes. Turning the system off helps keep it from pulling loose dust and debris into the ductwork while the filter slot is open. It takes two seconds. Looks responsible. Big homeowner energy.
Filter Replacement
How often should I change my furnace filter?
For typical household use, check your filter monthly and plan on replacing around every 90 days. Pets, dust, allergies, HVAC usage, and seasonal conditions can all make a filter load faster. Your filter doesn't own a calendar. Look at the thing.
How do I know when my furnace filter needs to be changed?
Take it out and look at it. If the media is heavily loaded with dust and debris, visibly dark, clogged, damaged, or way past your normal replacement interval, it's probably time. Gray little shame rectangle? Swap it.
Can a dirty furnace filter reduce airflow?
Yes. A lot. As a filter loads with debris, it creates more resistance to airflow and increases energy cost and consumption. Your filter should catch dirt. It shouldn't become drywall.
Can I leave my furnace filter in longer than 90 days?
Maybe. Homes with lighter HVAC usage may get more life from a filter, while other homes fill one up much faster. Inspect the filter monthly instead of blindly trusting a date. Lasting longer is good. Lasting until it looks fossilized is not.
Subscriptions
Does Yoor Air offer furnace filter subscriptions?
Yes. Choose your filter, pick your size, select a delivery schedule, and fresh filters show up automatically. Because remembering to change your furnace filter ranks somewhere between cleaning the dryer vent and figuring out where you put the warranty paperwork.
How much do I save by subscribing?
New Yoor Air subscribers receive 25% off the first subscription order, followed by 15% off ongoing subscription orders. Fresh filters, less money, and one fewer adult responsibility bouncing around your brain.
What subscription schedules are available?
Every month, every two months, every three months, every six months, and every twelve months. Pick the schedule that matches how quickly your home gets a filter dirty, then adjust it later if your house turns out to be grosser or cleaner than expected.
Can I skip a filter subscription order?
You can manage upcoming subscription deliveries through your account. Make any changes before the next scheduled order so you don't end up stockpiling filters like the furnace apocalypse is coming.
Custom & Hard-to-Find Sizes
Does Yoor Air offer custom furnace filter sizes?
We are not able to have custom filter sizes made at this time. We are working to bring manufacturing in-house for custom and hard-to-find sizes. When we can service custom filters again, there will be a whole lot of cheers and it will be prominent on this site.
What if I can't find my furnace filter size?
Check the frame of your current filter first. If there aren't any numbers, measure the width, height, and depth. Still unsure? Contact Yoor Air with your measurements or a photo and we'll help point you in the right direction. Don't guess. A filter that almost fits almost works.
Can Yoor Air help me figure out a weird filter size?
Absolutely. Send us the existing filter size, measurements, or a clear photo of the filter and slot. We'll help you figure out what should actually go in there. Your furnace called. It wants better protection.
Commercial HVAC Filters
Does Yoor Air sell commercial HVAC filters?
Yes. Yoor Air works with businesses that need dependable HVAC filters, recurring replacement orders, multiple filter sizes, and larger quantities. Commercial filters don't need to be boring either. They just need fewer jokes during the purchase-order meeting.
Can businesses order HVAC filters in bulk?
Yes. Contact Yoor Air with your filter sizes, quantities, and replacement needs and we can help organize larger orders without making you click Add to Cart 84 times like some kind of office supply hostage situation.
Can businesses set up recurring filter orders?
Recurring replacement schedules keep filters arriving when your building needs them instead of discovering six months later that the mechanical-room filter has developed its own ecosystem. Contact us to discuss sizes, quantities, and schedule.
About Yoor Air
What is Yoor Air?
Yoor Air is a family-owned, locally made HVAC air filter brand built to flip the script on the furnace filter industry. We make better-fitting, better-built filters for homeowners tired of weak frames, confusing sizes, and loose fits. Cleaner air. Better fit. Less dust. More attitude.
Are Yoor Air filters made in the USA?
Yes! Yoor Air filters are made in the USA and built by real people who care about making a better furnace filter. We looked at the old way of doing things — weak frames, loose fits, flimsy cardboard — and figured we could do better. So we did.
What makes Yoor Air different?
We pay attention to the things furnace filters should've been getting right all along: fit, frame strength, filtration media, airflow, odor control, clear sizing, and easy replacement schedules. The filter industry got lazy. We didn't.
Why doesn't Yoor Air use flimsy cardboard frames?
Traditional cardboard frames can bend, sag, absorb moisture, wiggle, and lose their shape. A stronger internal wire frame helps the filter maintain its structure and fit. Your filter shouldn't fold under pressure. That's literally part of the job.
Will Yoor Air make my house completely dust-free?
No, because we're an air filter company, not sorcerers. Filters help capture airborne dust traveling through your HVAC system, but dust also settles on surfaces and comes from everyday life. You're still going to have to dust the bookshelf. Sorry.
Didn't find your answer?
Got a weird size, a floppy old filter, a slot you don't trust, or no clue whether you need Pure, Pure Plus, or Pure Carbon? Send us a message. We'll help you figure out what belongs in your HVAC system without making you feel dumb for asking. Because furnace filters are already boring enough. Getting help shouldn't suck. Size matters. Measure first. Brag later.
