You asked: Why do I need to change my furnace filter so often?

Changing the air filter in your furnace regularly will prevent dust, dirt, mold spores, soot, bacteria, and allergens from building up in the air inside your home. … Changing your furnace filter is a very simple way to keep your indoor air clean and avoid costly repairs to your heating system.

Why does my furnace filter get dirty so quickly?

Leaky Duct Work

According to ENERGY STAR, a typical house loses 20-30% of air through leaks in the duct work and poor duct connections. Leaving these untreated can not only kill your furnace filter quickly, but also result in higher energy bills.

Why is my furnace filter so dirty every month?

You’re using a filter that is too thick.

The job of your filter is to catch contaminants as the air passes through, such as pet hair, dander, and dust. If you’re using a heavy, pleated filter, it’s going to catch more that tries to come through.

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Why do I have to change my air filter so often?

In general, the higher an air filter’s MERV rating, the more frequently you’ll need to replace it. … Every filter has a MERV rating that refers to how many air contaminants it can catch. The higher the number (between 1 and 20), the fewer contaminants can pass through it.

How often do you really need to change your furnace filter?

In general, this is how often changing furnace filters needs to be done: For 1- to 2-inch filters, replace them every 1 to 3 months. For 3- to 4-inch filters, replace them every 6 to 9 months. For 5- to 6-inch filters, replace them every 9 to 12 months.

Is no air filter better than a dirty one?

Running your air conditioner without a filter is worse than running it with a dirty one. Instead, get to the store as soon as possible for a replacement or call an HVAC professional for replacement. Without a filter, your air conditioner is at risk for severe and expensive problems.

Are expensive furnace filters necessary?

Furnace filters not only prevent the system from getting clogged up with dust and debris but also clean the air in your home. As they are essential to the system’s function, they must be maintained and kept clean.

Cheap Vs. Expensive Furnace Filters.

Cheap Filters Expensive Filters
Better airflow Denser material restricts airflow

Why is my air filter never dirty?

A filter is designed to catch all the air that goes through your air conditioning. Because of this, it needs to fit snugly inside the holder to have a chance at catching the air. … When that happens, the filter won’t get dirty because all that air isn’t going anywhere near it.

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What happens if air filter is dirty in house?

If the filter is very dirty, you may even feel warm air coming out of the back of the unit. A clogged filter forces the air conditioner to work harder to keep the house cool. This will lead to more frequent AC repairs and, ultimately, shorten the lifespan of the unit.

How long should furnace filters last?

Change Your Filters Regularly

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.

How do I know if my furnace filter is dirty?

What Are the Symptoms of a Dirty Air Filter?

  1. Filter is a different color. …
  2. Energy bills are higher than usual. …
  3. Low air flow. …
  4. Rise in physical issues. …
  5. Headaches. …
  6. Allergies. …
  7. Carbon monoxide poisoning. …
  8. Forces HVAC systems to work harder.

Why is my furnace filter gray?

Lots of Dirt and Soot

An air filter collects dirt, dust and other impurities. Look for the filter to turn dark gray as it catches a lot of these things. … Eventually, they reach the furnace’s filter. Residue made inside the furnace might result from a mechanical or other problem.

What happens if you don’t change your furnace filter?

Short Cycling

If the air filter is not serviced often enough, it will eventually become clogged to the point that air cannot pass through it. When the furnace is operating, the lack of air flow will trap the heat in the system. … Without a new air filter, the furnace will overheat every time it starts up again.

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What happens if you don’t change HVAC filter?

If you don’t change your AC filter, it will begin to fail. It will no longer be able to filter the air properly, letting dust and contaminants get into the AC. Dust jams the moving parts of an AC such as fan motors and valves. … This is how dust makes the unit less energy efficient (at best) and can lead to breakdowns.

How much does a furnace filter cost?

Although flat filter designs offer the most savings upfront, they need to be replaced more frequently and may cost you more in the long run. Replacing these filters can cost anywhere from $40 to $200 a year.