3M 9811DC-6 Filtrete Micro Allergen Reduction Filter 14-by-14-by-1-Inch, 6-Pack
From 3M
14"x 14" x 1", Red, Micro Allergen Filtrete Filter, 3 Month Filter Is 90% Effective At Capturing Large Allergens Like Mold Spores & Pet Dander, Captures Microscopic Allergens Like Dust, Smoke & Smog, Captures Bacteria & Particles That Can Carry Viruses, Meets The Guidelines Of The American Lung Association Health House Program.
- Amazon Sales Rank: #12756 in Home Improvement
- Size: 14x14x1
- Brand: 3M
- Model: 9811DC-6
- Number of items: 6
Filtrete Micro Allergen Reduction filters help reduce allergens and microscopic particles from air in homes. Captures large airborne allergens like household dust, pollen and mold spores.
Makes it easy to enjoy good clean living! 
I've used these Filtrete air filters for several years in different houses and I am very pleased with them. Yes, they are pricey but if you're prone to sneezing fits (as I am), they're worth every penny. Supposedly, the filter media is fine enough to capture even wee tiny particulate matter, including smoke and smog.
In addition to breathing easier and filtering out nasty smells from your house (which are huge benefits), I've noticed that using these filters also helps keep the house and tabletops cleaner, and there's less need for that dreaded chore of periodic dusting.
Another significant benefit is the benefit to your heating and cooling equipment. With a central air system costing thousands and thousands of dollars, this is not a small benefit! These high efficiency filters do a fine job of keeping dirt and dust out of the blower housing in your HVAC system. The traditional fiberglass filters (those cheap blue filters) keep small animals and yard waste from entering into your HVAC, but little else. Ever look at a 20-year-old blower housing? Usually they're caked with lots and lots of fine dust. In addition to being gross, that can't be good for an electrical appliance.
I highly recommend these Filtrete filters and I change mine more often than the manufacturer's 90-day recommended interval. And I think they're worth every penny of their hefty price tag.
Funtions as expected
This 6-pack is a very economical (cheap) way of buying filters. Especially because Lowes & Home Depot did not have my size (14x30) in stock. I got the medium-quality filtrete micro allergen because I wanted good filtration, but not the most expensive. They are perfectly suitable, with an indication of which side should face the intake, and how often they should be replaced (3 months). I'm happy :)
These are great- just be careful that too much filtration can OVERHEAT your heat and air units
These are great- just be careful that too much filtration can OVERHEAT your heat and air units
I was using the Filtrete dark blue 1500 rated filters and thought they were great. But eventually I found the air flow was less and less and then it almost stopped altogether. I had to call my Heat/ AC guys and they told me that if I used the higher rated filter (1500 or so, different for each system), the one that 'stopped' more allergens/ dust/ etc, that these high rated ones fill up quickly with all the gunk the catch, and that they can slow down the air flow so much that it may cause your heat/ AC machinery to overheat and damage itself.
He switched me to the red Filtretes- they are rated 1000 and not 1500. If you truly need higher levels of filtration, make sure your heat/ ac system can handle it, and maybe you have to change the filters more often (the really highly rated filters grab EVERYTHING so all the dust etc builds up much more quickly and could block the air flow entirely in less time than say the red 1000 ones. So stay as low as you can on the ratings, but if you have to block extra things like dust or mites or allergens, ask your heat/ AC guy to tell you which filter to use, knowing it will capture this much dust/mites/ allergens, and how often you have to change it. Hope that helped, and good luck
ps I myself am going to ask them if i can use the higher rated filters- say the 1500s- if i switch them out much more often. we'll see.
