How do you select filter medium?


I am a senior, have a 35 year old home. Heat/ac vents are in the ceiling. It is not currently in my budget to have the duct work professionally vacuumed/cleaned. I was wondering if it is possible to put some sort of medium in the individual room vents to help w/dust and allergies? I don't want to use anything that will diminish air flow thus increasing workload on my geothermal unit. Please advise.

  8 answers
  • Mogie Mogie on Mar 11, 2020

    My guess is that the problem is not dust coming through the ducts but coming in from around the duct work and pulling dust into your living spaces from the attic. Seal the gaps around the duct work where it vents into the room, and you should notice a big difference in your dust levels.

    Install vent filters in each vents. These are very inexpensive and simply rinse them out and use them again.

    You can get these at the Home Depot, Amazon or I think Wal-Mart carried them before.

  • Kathy Gunter Law Kathy Gunter Law on Mar 11, 2020

    You can do some cleaning yourself. Make sure the vents are wiped down and the vents are clean as far as you can see. Change the filter on the return monthly. I had a heating element go out and when we replaced it, they told me we had too many filters. We only needed one on the return in the unit, not on the inside of the house as well.

  • Redcatcec Redcatcec on Mar 11, 2020

    Mogie has the answer! It is more than likely that is the source of the dust in your home. To start with, what I would do is vacuum the vents with a soft bristle brush to catch any loose dust that may be caught on the vents themselves.

    Amazon has Vent Register filters you can buy, they will capture the dust coming from the vents. These are electrostatic vent register filters that will attract particles of dust, dirt, smoke, and pollen from the furnace by way of the furnace filter and registers.

    Of course change out your air filter in the furnace every 3 months to eliminate any buildup of particles it can catch, this will help your system work more efficiently. You also might want to check your attic for any rodent infestation, any droppings up there could be drawn into your hvac system and cause health issues.

    Best to you.

  • Dee Dee on Mar 11, 2020

    A pulmonologist [lung doctor] told my friend to get Filtrate filters Filtrete™ Dual-Action Micro Allergen Plus 2X Dust Defense. These are good for allergies and lung disease. You can find them at Costco 3 for $36.00 They last 3 months. Do not use washable filters as you cannot get all the germs out. Also it is not good to put filters in all of your vents, you will be blocking the flow of air.

  • William William on Mar 12, 2020

    Nope. You do not want to block any of the individual room vents. You block the air flow and put a strain on the main unit and it will fail sooner. Your main unit should have a filter in it that should be replaced every month. Duct cleaning is a rip off. The only time to have it done is when a major remodel is done and vents were not properly protected.

  • Johnavallance82 Johnavallance82 on Mar 12, 2020


    Have you thought to try your own Vac cleaner to suck out loose dust in the vents?

    Don't know how practical it is for you to do, but might be worth a try.!

  • Betsy Betsy on Mar 12, 2020

    Hi 1cs: Try calling your city's senior services, or senior resources, and see if they have someone who can come over and help you with this. Sometimes they have people who can help. Or, check with the Boy Scouts in your area. They may do this type of cleaning to earn a badge. Doesn't hurt to ask, a no is better than a missed yes. Good luck

  • Ken Erickson Ken Erickson on Mar 12, 2020

    Good filters at inlet of your heating unit is the best place to have filters.