Quick Answer: Do Thicker Furnace Filters Last Longer?

How dirty should an air filter look?

Dirty Air Filter Performing a visual inspection is an easy way to know if your air filter needs to be changed.

A brand new air filter is white or off-white in color, while a dirty air filter will appear darker with the dirt and debris visible..

Is a 5 inch furnace filter better than a 1 inch?

Most air filters are 1 inch thick, but some systems can accommodate filters 2 to 5 inches thick. In our tests, we found that the thicker the filter, the better it works and the longer the replacement intervals. That means it’s better for you and for your HVAC system.

How long do furnace filters last?

For example, a one inch furnace filter should be changed out every one to three months. A three to four-inch filter can last for six to nine months. If you have a thick five to six-inch filter, it can last from nine to twelve months.

Are expensive furnace filters worth the money?

More expensive filters like Pleated Residential filters filter out dust mites, pollen, mold and pet dander and even bacteria and so are worth the money especially for those with severe allergies. HEPA filters filter bacteria and viruses and are worth the extra money for those with respiratory conditions like emphysema.

What type of filter is best for a furnace?

BEST OVERALL: Nordic Pure MERV 12 Pleated AC Furnace Air Filters.BEST SMART FILTER: Filtrete Smart AC Furnace Air Filter.BEST BANG FOR THE BUCK: FilterBuy MERV 8 Pleated AC Furnace Air Filter.BEST FOR ALLERGIES: AIRx ALLERGY MERV 11 Pleated Air Filter.BEST FOR PETS: Aerostar Allergen & Pet Dander Pleated Air Filter.More items…

How often should you change your furnace filter in the winter?

three monthsProfessionals, like our team at Airco Service, Inc. say that you should change your air filter at least every three months. During the winter, when you rely on your heating system more, you want to increase that frequency. During the winter, when the system is in constant use, change it out every month.

Is MERV 13 bad for HVAC?

Wrong. While the highest MERV ratings are the most effective for air quality, they can harm your HVAC system. A higher MERV rating means a higher resistance, which means less airflow….Learn how to maintain your. home and HVAC this fall.MERVMinimum Particle Size13–161.0–0.3 μm17–20< 0.3 μm3 more rows•Sep 20, 2019

Are thicker furnace filters better?

Furnace filters can range anywhere from 1″to 5″ in thickness. In general, the thicker the furnace filter is the more efficiently your unit work and the longer it will last.

What happens if furnace filter is backwards?

When a furnace filter is placed backwards, the fibers can’t do their job properly. This means your furnace has to work harder to generate the same air flow, resulting in increased energy costs. Particles are also allowed to build up irregularly, making the furnace working even harder to draw air.

Is a 2 inch filter better than a 1 inch?

1″ filters suck. They block a lot of air flow. 2 inch is the smallest I put in, and 4″ is optimal. Sure it filters, but it doesn’t have enough surface area to allow the airflow a system needs.

Does thickness of furnace filter matter?

Filter thickness: A filter’s thickness can range from 1″ to 5″. As a general rule of thumb, a thicker furnace filter will last longer and can be more efficient. Your system configuration will determine the thickness of the filter that you can use.

How often should furnace filters be changed?

A good rule of thumb is to change 1-2 inch filters every three months, 4 inch filters every six months and 5 inch filters every 12 months. Signs your air filter needs changed: The filter is visibly dirty. Certainly if you can’t see the material of the filter itself, it should be replaced.

Are 4 inch or 1 inch furnace filters better?

The 20x25x4 air filter is a bigger furnace than other furnace filters. At four inches thick, it offers greater surface area to capture more particles and germs from airflow. It works better and it lasts longer than other cheaper disposable air filters.

Why does my furnace filter get dirty so quickly?

When your A/C is on the thermostat fan will constantly be running causing air too run over the air filter continuously and causing it to get dirty more quickly. … You may have a leak in your air ducts – Leaky air ducts can also cause your filter to clog up and especially if it is near your AC unit.

What happens when air filter is too dirty?

A bad or dirty air filter restricts air flow, lowering the oxygen in the mixture. Your engine compensates for this by consuming more fuel to produce enough power to move the same distance or speed as you could with a clean filter.

Is it better to use cheap furnace filters?

Cheap fiberglass filters are designed to stop dust, debris and hair from gunking up the system. While they do little to filter out allergens and other irritants, using them keeps your HVAC system clean and efficient. … They can add more resistance to airflow, which makes the system more expensive to operate.

How do I know if my furnace filter is dirty?

Watch out for these signs that signify the time to replace your furnace filters.Your Bills Creep Up. If your bills have been cranking up, dirty and clogged filters might be the culprit. … You’re Getting Sick. … You Notice a Burning Smell. … Less Heat, Longer Runtime. … Your Home is Dustier than Before.

Is no air filter better than a dirty one?

Without a filter there to trap air pollutants, your home’s air quality will deteriorate. That’s because the same air contaminants will just circulate through your home. But what’s worse is that you’re likely bringing even more pollutants into your home on a daily basis.