Use 1" furnace filter instead of 5" ?

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Joseph Meehan wrote:

has been demonstrated.
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CJT wrote:

While it would depend on the specific filters, I is a very good bet it would increase the resistance unless you were using some very cheap poor quality filters, and maybe even for those.
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Using 5, 1" filters wont work, you wont have enough air pass and will overheat your furnace and get little air. A 5" media lasts, allows much less 1st time pollutant pass through. Use what its designed for a 5" unit.
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m Ransley wrote:

I built a wooden frame that fit in my 5 inch media slot and which accepted standard one inch media.
The problem with 5 inch is that it "looks" dirty just as fast as one inch and nobody will tell you "for certain" how long you should use the filter before replacing and the HVAC crowd is always warning us about not letting the filter get too clogged. Well if you don't have a pressure meter how do you tell this?
With a three to five dollar one inch filter I can take the attitude "if in doubt replace it". That gets pretty expensive with five inch media. The stuff that came in my furnace was over forty dollars a pop.
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My April Air media lasts over 1 year, your 1-5$ thing will be inferior in operation. I cant believe anybody would even consider doing what you plan. Your furnace -AC coil is what you are trying to protect to not loose efficiency from crapping it up. You have a superior system , use it.
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replying to m Ransley, Allie wrote: My filter is black after one month. Will never last a year. Theyre $30 each! Didn't know it would be so expensive. Bet you would "rig" it too If you had to pay that every month for a 5" filter.
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On Tuesday, November 1, 2016 at 4:44:04 PM UTC-4, Allie wrote:

That thread is ten years old and Mr. Ransley hasn't been heard from in a very long time. But maybe you can't see how old posts are because your house is full of smoke and dirty air. It seems it would have to be to turn a new 5" filter dirty in just a month. I easily go 2 years on mine.
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snipped-for-privacy@optonline.net says...

What kind of house is this in ? Must have a dirt floor to get the filter that dirty that quick. I use the inexpensive 1 inch ones and change them every 2 months. The first day of the odd numbered ones so I can remember when to do it. They look as if they could go twice that long, but at a buck or two each it is not htat expensive.
Had to have a man to work on the system a while back and while he was here I let him talk me into cleaning the inside and outside coils. He asked me if I had just changed the filter and cleaned the inside coils as they were very clean. The filter was about a month old and the inside unit was installed about 6 years before and never cleaned.
One thing that may help is that we never open the windows. As the wife and I are both sensitive to pollen, we tend not to want much outside air in the house.
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On Tue, 1 Nov 2016 17:41:47 -0400, Ralph Mowery

Guess where the air in your house comes from? (Unless you have a company deliver "inside air" once a week.....).
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snipped-for-privacy@unlisted.moo says...

We loose some air when we open the doors to go out,so I keep a tank of air that I fill up at the service station to replace the lost air. We put that air through a filter to eliminate the pollen.
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replying to Ralph Mowery, Allie wrote: My house inside is not dirty. Non smoker. Even installer can't figure why it gets so dirty so fast. Can't afford those filters every month. Regret getting this new unit with the big filter box. Going to try the 2" filter. Theyre bad enough. $70 for 4.
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replying to Ralph Mowery, Allie wrote: No dirt floor..haha. Not. Non smoker, 3 dogs. Florida humidity..sand not dirt outside.
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caedfaa9ed1216d60ef78a6f660f5f85 snipped-for-privacy@example.com says...

With 3 dogs it could be lots of dog hair. If this is the case it would probably be beter if you switched to a less expensive filter and changed it once a month.
I guess that if Florida you run the unit most of the year. I am in the middle of NC and have a heat pump so it runs much of the year. No animals in the house and the 1 inch filter changed every two months seems to filter it out very well. Not too dirty and the coils were cleaned after several years by an AC repair man. He said they did not really need it, but was part of the service.
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replying to Ralph Mowery, Allie wrote: Thanks Ralph. Talked a specialist/ac company she said same thing. She said there's no reason to have such a big honking filter..more money for these filter companies. That I could tape a 1" filter to the unit/handler where air draws it,,change every month. Plus, my unit must be freezing up from the dirty filter causing water leaking in house. Yes, drain outside is free.it has to be that filter.
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On 11/2/2016 12:44 PM, Allie wrote:

I live in a dusty climate and when using the standard cheap filters the dust would go through them and collect on the cold wet coils (inside the unit). Eventually the dust would wash down and clog the pan's drain exit hole (still inside the unit) while the drain pipe itself appeared clear. This resulted in the pan overflowing and leaking into the garage and house. I solved the problem by using an allergenic filter. I get them at Target for $12.95. (My filter is 20x30x1 and I generally get 3 months which is what's recommended on the filter.)
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On Wednesday, November 2, 2016 at 4:30:47 PM UTC-4, AL wrote:

That's what some people apparently don't realize. There are filter specs on what particle size they will filter out. The 5" filters will remove smaller particles from the air. The downside is that if you have dirty air, they will need replacing sooner. Sure, you can replace them with a cheap 2" or even 1" filter, but then you won't get the same filtration. It's up to everyone what they want, less frequent filter changes or clean air. They just need to check the specs. I bet the cheap filters don't even have specs. Those 1" fiberglass ones never trapped much of anything, as far as I can tell.
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replying to trader_4, Allie wrote: Trouble is, this is a brand new unit. I never had to replace filters that were this dirty after one month. The old unit never froze up or leaked due to bad filter. I'll try med prices $10 to $15 filters..not the $1 ones..
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On Wednesday, November 2, 2016 at 9:14:05 PM UTC-4, Allie wrote:

Put a crap filter, like those cheap 1" fiberglass ones, in a dirty air stream, with particles from large down to smoke size. Take a Merv 14 and put it into the same dirty air stream. The MERV will dirty up quickly, the fiberglass crap one could last orders of magnitude longer, because it's not catching much. And a decent MERV 14 filter will have the deep pleats so that it can take more dirt, while still maintaining a low pressure delta.
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caedfaa9ed1216d60ef78a6f660f5f85 snipped-for-privacy@example.com says...

There are usually tow common reasons for the unit to freeze. Low air flow and low refrigerant (Freon to most people). While it seems backwards, when your unit runs low on refrigerant the coils actually get colder and if cold enough the water that condenses on the coils will freeze up and restrict the air flow even more.
Look for ice on the coils and see if there is any. If not and just water, you have some kind of drain problem. The aircondition unit acts like a big dehumidifier if working and sized correctly and lowers the humidity in the house so you feel more comfortable.
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replying to Ralph Mowery, Allie wrote: I think in my case it's the low air flow, again, that dirty filter. I don't mind changing it every month of Theyre not $40 each.
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