Sorry, this site requires JavaScript.
Blog News

I don't need new air conditioning filters in October!

Autumn leaves

A great many people think this as Fall and Winter approach.

They are partially right.

I say this because the real headline should read →

I need air filters in October!

It's not hot outside and you don't need air conditioning filters.

But – what happens when it's 50 degrees or colder outside and you want to run your heater?

Outside air passes through your air filters into your home.

You know, that Fall and Winter air that is so not clean.

Consider what's in that outside air -- dry grass pollen, decaying and dead plant and leaf debris, dust and dirt from dry soil conditions, smoke from fires, debris from insects and other weather-impacted organisms, pollen from cedar and other pollinating trees and...

I'll stop now. I think you get it – lots of bad things still need to be filtered out of the air.

With CLEAN air filters that need to be changed on a regular basis, especially if you are running your HVAC heater.

Some folks will argue – I open up my house to allow “fresh” air from the outside.

Yep, the same fresh air that contains dry grass pollen, decaying and dead plant and leaf debris, dust and dirt from dry soil conditions, smoke from fires, debris from insects and other weather-impacted organisms, pollen from cedar and other pollinating trees and... this air gets recirculated in your HVAC system – where you NEED clean air filters to, well, clean the blankety-blank air.

Atchoo !!!

Conclusion: you do NOT need air conditioning filters in Fall and Winter. You DO NEED clean air filters if you plan on using your central air furnace (heater).

You know we don't kid about around about fresh air – so get new filters today.

Proudly made in San Antonio, Texas by the Dilling family.

Why Should I Buy Filters from Filters4Air?

Why Should I Buy Filters from Filters4Air?

Good question; and we'll try to answer it...

Let's be honest, you can find cheaper filters than the ones we sell.

Notice I did not say “less expensive”-- I said “cheaper.” As in, more cheaply made, with lesser quality materials, lower levels of workmanship and shipped from production facilities usually not in America.

We use the best quality materials available, handled by people who care about the final product and we manufacture your filters right here in America – in San Antonio, Texas.

Yes, we charge a bit more than the grocery store, but we think when it comes to the air you and your family breathe at home, you want quality filters that are assembled correctly.

With that in mind, I hope you'll consider us for your next filter purchase.

Thanks for the ear.

Is it time to spring for new air filters?

Is it time to spring for new air filters?

Spring is just around the corner and you know what that means ...


And if you are living in San Antonio, you know that means OAK pollen -- lots of it -- everywhere! Expect your cars to have a new coat of yellow "paint" in a few weeks ...

... and also grasses, plants, shrubs, trees and flowers all getting their spring growth going and that means ‘sneeze’ in any language.

Now just imagine how much of that gunk is getting sucked into your AC system and into your home! And even if you aren't in San Antonio, spring is a tough time to be an air conditioner just about anywhere.

Make sure you enjoy your spring break by keeping your air clear and staying healthy. Set up a monthly subscription and let us worry about getting you a new filter. Remember that Filters4Air filters are manufactured in the U.S.A.

Ready to go? Then make your first order!

Keep your air clean during the cold season!

Keep your air clean during the cold season!

We have a love-hate relationship with winter.

Winter means cooler temperatures. It means the holidays. It means the opportunity to make changes for a new year. Gifts, good food, friendship and good will.

It also means pollen. Dead and drying leaves and grasses. Mites, allergens. Dust, dirt and smoke.

For many people it also means cedar fever, though it is not really a fever and it is not really cedar, but ashe juniper.


Who cares what the name of the &^%$# tree is? For tens of millions of people it means itchy eyes, headaches, and constant sneezing. Relentless.

And here’s something you need to remember – this doesn’t just happen because you spend time outside breathing in the pollen. Nope – it always happens because in the winter we spend more time inside our homes because it’s cold and miserable outside.

We stay inside, where we think we don’t have to change our air-conditioning filters because we’re not running the air conditioning. Memo – they are actually just air filters, and they process cold and hot air – when you are running the heater, all those pollens (including that stinking cedar) must be passed through your air filters.

If the filters are dirty, you are breathing pollen-ridden and dirty air. Period. End. Of. Story.

You need to keep your air filters clean by replacing them every month, and maybe even more often during periods of high pollen. You know, like NOW!

Yeah, we’re trying to sell air filters – that’s our business – but we live by our own advice because we also reside in San Antonio where the cedar pollen count is, as they say, “off the charts.”

Until next time – go buy some filters at !!!

Filters4Air wishes you clean and happy holidays!

Filters4Air wishes you clean and happy holidays!

Everyone at Filters4Air wants to wish our customers happy holidays!

While we wait for the south Texas winter to get here, this is a friendly reminder that your AC filters are doing work regardless of whether your AC unit is blowing hot or cold!

Since we are all about the quality of air, we think winter is the perfect time to do some home cooking and fill your house with some wonderful holiday fragrances.

Here is a recipe that will do just that →

Gingersnap Cookies

Just remember — your filter doesn't have a nose! When was the last time you replaced your filter?

Order some filters!

Who is Merv and why does he care about my air filters?

Who is Merv and why does he care about my air filters?


Who is Merv and why does he care about my air filters?

Good question.

Merv is not the name of a talk show host (if that goes over your head, you'll just have to Googlize it). Hint: think Griffin.

Actually, MERV stands for Minimum Efficiency Reporting Value, which is a rating system established by the American Society of Heating, Refrigerating and Air-Conditioning Engineers.

Say that five times fast.

I know – “that, that, that, that, that.” Sorry I said anything.

MERV is designed to let you, the consumer, know the purpose for which the filter is intended.

This is a chart I “borrowed” from Wikipedia. Hey, I donate money to support them.


Minimum particle size

Typical controlled
contaminant or air element

Typical Application


> 10.0 μm

Pollen, dust mites, cockroach debris,
sanding dust, spray paint dust, textile fibers, carpet fibers

Residential window AC units


10.0–3.0 μm

Mold spores, dust mite debris, cat and dog dander, hair spray, fabric protector, dusting aids, pudding mix

Better residential, general commercial, industrial workspaces


3.0–1.0 μm

Legionella, humidifier dust, lead dust,
milled flour, auto emission particulates, nebulizer droplets

Superior residential, better commercial, hospital laboratories


1.0–0.3 μm

Bacteria, droplet nuclei (sneeze), cooking oil, most smoke and insecticide dust, most face powder, most paint pigments

Hospital & general surgery


< 0.3 μm

Virus, carbon dust, sea salt, smoke

Electronics & pharmaceutical manufacturing clean rooms

At Filters4Air we give you a choice – MERV-10, or what we call High Performance Allergy, and MERV-13, or what we call High Performance Allergy Plus.

If you start sneezing due to pollen, grasses, smoke or whatever – you need a new high-quality filter.

Hey – we sell high-quality filters. Who knew?

Anyway, we deliver right to your door. We also install, if you need help. Win-win.

Just go to our website and get your order in because winter is coming and that means your heater is on all the time, and that places as much strain or your air filters as air conditioning.

I mean, they are called “air filters” not “air conditioning filters.”

Just saying.

Aaargh, I hate that expression.

Hope you check us out at and thanks for the ear !!!


Does your home have clean air?

Does your home have clean air?


We all want to breath clean air.

In many parts of the world, this is not so easily accomplished.

Fortunately, America has some of the best air around, but here are still challenges, and those challenges can be unique to different parts of the country.

In some places, it is dust from harvested fields or arid areas. Or, it might be pollen from cedar, oak and other trees and from a multitude of grasses. It might be spores and mold particles from excessive rain. Oh, and then there’s smoke, car exhaust, pet dander, particles from construction sites, etc.

Truth be told, your home is your sanctuary. It’s where you go to escape from the maddening pace of everyday life and feel safe. It’s where you go and expect to breath clean, fresh, air.

Well, truly clean air in the home can use a little help.

Keep your air filters clean by replacing them in a timely manner.

Of course we’re going to say that – we want to sell you air filters – but that doesn’t mean that what we are saying is not true. It’s just good advice.

In an area with no outside air challenges, you can probably replace your filters every three months or more without an issue. In situations where you face some of the things we talked about above, the general rule is to replace your filter every 30 days.

Now, these does not mean to blindly follow this advice. Hey, pull that filter out and take a look. Trust me, you’ll know if it is clean and fresh or not. If not, replace it.

Tell you what, just to show we mean business, use the promo code “dirty” and we’ll give you 10% off your first order when you sign up for a monthly subscription.”

You can’t get a better deal unless you break into our manufacturing facility and steal filters.

Please don’t do that.

Here’s to clean air!!!


Too Hot to Handle.

Too Hot to Handle.

 Summer heat can be brutal – especially in an urban environment.

All that concrete, cars and buildings.


Hooray for air-conditioning.

Yes, but don’t forget what really keeps your air clean is the air-conditioning filter – and filters take a beating all-year round, but the summer is particularly, well, brutal.

Dust, dander, dried grasses, smoke, pollen, allergens – take your pick – they are all “out there” trying to get inside your house.

You know – get through your air-conditioning system that is running CONSTANTLY 24-7 without a break.

You can get a bunch of ice and lay around like our friend above – or you can keep your air filters fresh.

Replace your air filters every 30 days – it’s just that simple.

Stay calm and breath clean air.




 That is a great question – and I hope to give you some great answers.

(1) We will ship fresh, new, filters (manufactured in San Antonio, Texas) direct to your doorstep. Simply take them out of the package and install – and we even offer installation service if you need help !

(2) You peace of mind is assured because we make sure the filters are made to the highest manufacturing standards and meet or exceed the needs of all our residential customers !

(3) Let’s be honest – no matter where you live there are air quality issues. Pet dander, construction debris, car exhausts, allergens, pollen, smoke and just the regular dirt and dust from everyday living can take a toll on an air filters ability to do its job – and that job is making sure you breathe clean air. A subscription with Filters4Air means you KNOW when it’s time to change your filter when the filter shows up on your doorstep!

(4) We’ve been making filters in San Antonio since 1995 in our family-owned business, and we care about our products and the people who use them.

Last – but certainly not least – if you go to our website and signup for monthly delivery – we’ll offer you a discount. Use the promo code SUMMER and we’ll reduce the price of your filters by 10% for the first six months.

Clean air — don't take our word for it.

Clean air — don't take our word for it.

One of the things we do here on the Filters4Air blog is constantly harp to our readers about changing their filters on a regular basis.

Many folks think — "Of course Filters4Air wants the Customer to change their filter so Filters4Air can sell more filters!"

Yes, true, but we aren't the only folks who think changing filters on a regular basis is one of the very important things you can do to keep your indoor air as healthy as possible.

The EPA (Environmental Protection Agency) states that the air quality within homes can be more polluted than the outdoor air even in the largest and most industrialized cities. But there are things you can do to seriously improve your indoor air quality and make your home a healthier place.

One of the things the EPA says you should do is →

Clean or change all the filters in your house regularly, particularly those for your heater or furnace, air conditioner, air purifier, and vacuum. Follow the manufacturer’s instructions and stay up to date.

How about another government agency — the Consumer Product Safety Commission. They say →

"Blocked, leaking, or damaged chimneys or flues release harmful combustion gases and particles and even fatal concentrations of carbon monoxide. Strictly follow all service and maintenance procedures recommended by the manufacturer, including those that tell you how frequently to change the filter. If manufacturer's instructions are not readily available, change filters once every month or two during periods of use. Proper maintenance is important even for new furnaces because they can also corrode and leak combustion gases, including carbon monoxide."

Harvard University has some information →

Change your filters. If you have a forced-air heating system, be certain to change the filters regularly, says Dr. BuSaba. Electrostatic filters can help ensure that dust and other airborne irritants get trapped instead of being recirculated throughout your home.

This is from the American Industrial Hygiene Association​ →

Use higher efficiency furnace or air conditioner air filters and change filters frequently

So, you don’t have to listen to us here at F4A constantly telling you to change your air filters regularly – you can check out the above sources saying the same thing...

One last visit to the EPA ( →

How to Prevent Duct Contamination

Whether or not you decide to have the air ducts in your home cleaned, committing to a good preventive maintenance program is essential to minimize duct contamination.

To prevent dirt from entering the system:

✔ Use the highest efficiency air filter recommended by the manufacturer of your heating and cooling system.

✔ Change filters regularly.

✔ If your filters become clogged, change them more frequently.

✔ Be sure you do not have any missing filters and that air cannot bypass filters through gaps around the filter holder.

✔ When having your heating and cooling system maintained or checked for other reasons, be sure to ask the service provider to clean cooling coils and drain pans.

✔ During construction or renovation work that produces dust in your home, seal off supply and return registers and do not operate the heating and cooling system until after cleaning up the dust.

✔ Remove dust and vacuum your home regularly. (Use a high efficiency vacuum (HEPA) cleaner or the highest efficiency filter bags your vacuum cleaner can take. Vacuuming can increase the amount of dust in the air during and after vacuuming as well as in your ducts).

✔ If your heating system includes in-duct humidification equipment, be sure to operate and maintain the humidifier strictly as recommended by the manufacturer.

We all love clean air.

Now go buy a filter from us !!!

Page 1 of 3 Next