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Feb 10

Purpose of a filter in HVAC system

A filter can provide 3 basic functions, but only if the proper one is chosen.

Keep system clean

The primary function of a filter is to keep the components inside the system clean. This is what the basic filters are designed for; as the air travels the ductwork and arrives at the furnace the filter will trap all large debris and particles from the air. The result is air that is cleaner passing through the furnace to be delivered back to the home.

Reduce dust

Although no furnace filter is designed specifically to dust your house, a better quality filter will trap more and smaller particles and reduce the amount of particles delivered back to your ductwork and home. One common misunderstood point is that only a small amount of the “dust” in your home will actually make its way into the ductwork to even cross the filter. It would be nice, but any filtration system will only provide minimal help with dust.

Reduce Allergens

A high quality filtration system can go along way to help reduce allergy issues. There are several type that can help, the best ones out there use heap filtration. This can provide significant relief. There are also electronic filter that provide good relief. Then the high end cartridge filters that help with minor allergies. These can be fitted into your existing system with only minor changes.

As you can see, filters can provide many solutions to your home. However if you try to accomplish a specific task with the wrong filter it will lead to frustration and wasted money.


  • Date Of Service: 10/27/2016

    Great service, awesome staff both technician and office personnel. Universal puts the customer first.
    Patrick C.
  • Thanks for a job well done!  Miles conducted a preventative check
    on my A/C & Heating. I was curious, as I have never had to have my furnace checked. 

    Miles carefully explained to me what and why he was doing as hechecked and cleaned the various parts. I appreciated the courteous and professional manner of my technician, throughout the process.  Kudos to Universal! 

    Susan C.
  • What a great bunch of guys ! hard workers,polite left everything clean .Explained everything in detail. You could tell they all worked together well and with respect to each other. I had to leave for a few hours and felt very comfortable in doing that. I also got a few cleaning tips ...very helpful. Thanks to you all , I am chillin today!!
    S. Miller
  • All workers were punctual, diligent, worked super hard in hot conditions, very competent, respectful and cleaned up when finished.”

    Karen S.

  • I was surfing for someone to do some duct work in my cracker box of a house (built in 1965), the original ducts were split and not connected to the floor of the bedrooms thus no airflow. I got 3 estimates Universal being the last. Eric the owner came out and within 10 minutes knew I was going to give him the job. He was the only one who offered a solution to a problem with heating in the basement that the others never noticed or approached with me. Solid advice!  I've had a lot of good and bad contractors in my day but without question Universal was the most comprehensive and honest I've ever had the pleasure to deal with. The whole staff from Eric to the installers to the office staff were nothing but total professionals and wanting to make sure everything was a pleasant experience. If you have any doubts, contact them to contact me and I will personally get back to you and let you come over and see the work.......really great stuff!  Thanks guys, it's been a real pleasure, you're the best.

    B. Britt - Pasadena

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Call: 410-544-7334
8176 Ritchie Highway
Pasadena, MD 21122

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Universal AC & Heat Inc., Air conditioning & Heating Contractors  Commercial, Pasadena, MD