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Old 03-15-19, 12:29 PM   #1
Daox
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Default K&N now makes reusable furnace filters

I got an email the other day from K&N saying that they now are selling reusable (cleanable) furnace filters. So, I checked it out and they seem to have a decent selection. I checked out what the cost is for my furnace filter (14x20x1), and it seems pretty reasonable at ~$40.

https://www.knfilters.com/home-air-filters









They do have a spray to use on the filter after cleaning. I don't think its an oil like their automotive filters though. It says its just for cleaning and neutralizing odors.

Quote:
K&N part 99-6010 is a 32 ounce pump spray bottle of HVAC Filter Cleaner. K&N HVAC Filter Cleaner is the only cleaner recommended to clean K&N HVAC Filters. K&N 99-6010 eliminates and cleanses particles from the surface of the K&N HVAC Filter so it can be washed clean with water. After letting your K&N HVAC Filter dry it is recommended to apply a small amount of the cleaner to help neutralizes odor causing sources instead of masking these odors.



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Old 03-15-19, 12:46 PM   #2
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Default

Thanks for sharing.
I will have to check it out. I have used them for High horse power cars and they worked well.
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Old 03-17-19, 02:09 PM   #3
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Great idea! Think I will get some
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Old 03-21-19, 07:40 PM   #4
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Filters like Filtrete have spec numbers that relate
to the size of particles and air resistance.
I couldn't find any way to relate the K&N filters to that
scale.
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Old Today, 12:43 PM   #5
CrankyDoug
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I've had mixed feelings about K&N filters for years. Their off road motorcycle filters improved breathing but were terrible at keeping fine silt out of the engine. Some riders started putting the OEM (oiled) outer foam filter over them to compensate for what was really just a bad filter for the application.

Some reusable filter manufacturers do it better than others but most do it badly. I threw away the last set of washable AC filters because they caused so much pressure drop the evap coil iced over from inadequate air flow.

I installed a substantially oversized filter housing in my parents system to compensate for the pressure drop of a premium Filtrete. It still caused enough pressure drop to collapse the return duct. I gave up using premium filters when the air handler in my house inhaled a clean filter.

The bottom line with filters is this: Improving filtration for a given area results in greater pressure drop. If you want better filtering you really need to increase filter area. My existing 2 ton unit has one 16X20 filter. The new unit will have four 16X20 filters.

K&N filters work great for cars if you keep them clean and oiled. They work great for chainsaws because fine sawdust isn't abrasive and blows through the engine without much affect. K&N might work well as a washable AC filter. Given my experience with them, I share ham789's skepticism if K&N doesn't publish particulate and pressure drop data.

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Old Today, 05:01 PM   #6
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Basically what I was going to say about reusable filters. In the automotive world they improve airflow at the detriment of poor filtering but in most all dyno tests the K&N didn't to an appreciable improvement in power ( you will never notice it).

Stick with traditional filters. If you want high filtering capability install a very large pocket filter assembly. Very good filtration, filters last a long time and they arent really expensive when you compare price to lifespan.

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