Don’t feel awkward if you don’t know. You’re not alone—it’s a common question. Most air filters are found close to your heating, ventilation and air conditioning system (HVAC) Air Handler unit. The Air Handler is typically located in the basement, attic, closet or garage. It’s also pretty common for air filters to be placed in the return vents throughout a home.

Here’s some ideas of what they may look like. Learn more ►

You don’t have to be an air conditioner or furnace system “whisperer” to figure this out. The easiest thing to do is look at your old filter. The measurements are usually printed on the side (like the image shown here). If there’s no filter behind the air return vent or inside the air handler (the big thing that blows the air and is usually in the basement, attic or sometimes a closet upstairs) then you’ll need to measure to determine the dimensions needed. Measure the length, width, and thickness (height) of the space where the air filter will go. Most air conditioners oro furnaces require a 1″ thick filter, but there are also some that will allow for 5″ air filter. Need more help?

MERV 8 Air filter showing dimensions, Indoor Wellness

There’s no single answer to this. It depends on the number of people in your home, whether there are smokers, whether you own pets, and geography. The more stuff that goes into the air, the more often your filters need to be changed. Dryer climates don’t need to change their air filters nearly as much as those living in more humid states.

Generally speaking, we recommend, at the very least, that you check your air filters every month. When you see a coating of dust and dirt, they need to be replaced.

A rough guide is:

  • 1” filters: Check or replace monthly
  • 2” filters: Check monthly or replace every 2 month
  • 4″ filters: Check monthly or replace every 6 months
  • 5” filters (compatible with Honeywell Units): Check monthly and/or replace every 6 months

There are few things that can make as substantial an impact to the air you breathe indoors as the filter used in your heating and air conditioning unit, or system. Why is this? Without a good filter you’re air ventilation system recycles all the allergens, pollen, and bacteria you breathe and passes it around the house. It can also spread mold, pet dander, odors and fumes. Read More ►

MERV ratings play an important role in choosing which filter you want for your home. You may ask yourself a couple key questions to narrow down which MERV rated air filter is best for you, like:

  • Do I keep a clean house?
  • Do I have allergies? If so, how severe?
  • Do I have a dusty home or have a lot of carpet?
  • Do I have pets?
  • Does someone in the house smoke?
  • Do I tend to cook a little or a lot?
  • Is there sickness getting passed around a lot?

Read More ►

MERV Ratings don’t necessarily equate to Filter Quality. These are terms that can often be misused (used interchangeably), misunderstood and even misleading. There are aspects of building a filter that aren’t regulated: like pleating, the cardboard shell, wire mesh, assembly and more. These added details play a substantial role in how well your MERV 8, 11, or 13 filter actually perform their job over the month, 2 months or 3 months before you switch them out for a new one. A sturdier, more robust filter will be more durable and retain its shape and integrity better over time. Read More ►

Some may think that a higher MERV rating will provide a better filter, but this simply isn’t the case. Renowned home improvement expert, Bob Vila said, “You might think that a higher MERV rating would automatically be better, but it’s not. The higher the MERV rating, the smaller the pores are for air to flow through an HVAC filter. This can create more resistance in airflow than a system is designed to manage, thus making it inefficient.”

Here’s a good visual difference example between two similar rated filters.

Air Filter Comparison between Filtrete and Indoor Wellness MERV 8

Conventional filters trap dirt on the surface. Carbon filters, attract and trap particles on a molecular level, preventing re-circulation. That increases their effectiveness in eliminating tough and persistent odors from cigarette smoke, cooking, pets odors and other scent factories. While carbon filters are pleated, don’t be misled – ordinary pleated filters don’t clean the air they simply just mask the odors. Learn more about Carbon filters.

Absolutely. To quote the Energy Star – they are part of the EPA. “A dirty filter will slow down air flow and make the system work harder to keep you warm or cool—wasting energy…leading to expensive maintenance and/or early system failure.”

Changing your air filter regularly will both extend the life of your heating and cooling system, and remove any allergens or potentially harmful pollutants in your home’s air. Learn more about how improving the quality of air in your home can help improve you and your family’s overall health.

Minimum Efficiency Reporting Value (MERV) is a rating standard assigned to an air filter pending the particle size the air filter can trap. Some might think that a higher MERV rating would automatically be better, but it’s not. Learn More ►

We can’t account for changes in first-name popularity.

Good question. Our Air Filters on Demand subscription service is built to help people achieve a healthier level of indoor air quality. Most people can’t remember the last time they changed their air filters, and/or they forget to switch them out frequently enough without a reminder. Do you?

If you’re one of the few that remember to do this on your own—BRAVO. We applaud you.

If not, we deliver contractor preferred air filters to your door, notifying you when it is time to change them and more.  No more shopping or struggling to remember your filter size.  Everything else that’s important to your family’s well-being is now being delivered. Welcome to the club.

But, if you’d prefer to not set up a subscription, we do offer a one-time purchase option, or you can buy your air filters in bulk. A few of our customers actually prefer to stash a 6 or 12-month supply in their closet, garage, under the bed or wherever as opposed to this simple subscription.

Our Air Filters On Demand is a subscription service that will automatically renew based on the delivery preferences you set when you originally signed up. There is no mandatory subscription time length, and you can cancel your subscription anytime. To cancel your subscription, simply Login to your account, select Subscriptions then cancel.

Instead of canceling, you can easily switch from Monthly Delivery to 3 Month Delivery, or vice versa. It’s your subscription, and you’re in charge. It’s why we call it Air Filters On Demand…because it can be more than just a simple online delivery option.

In your account portal, you can manage your delivery, payment, address and communication preferences too.