It's good to get a heating/cooling seasonal tune-up/check-up and get onto the HVAC company's service plan. Munn's is good and thorough for about $120 (can't remember the exact amount). Maybe your freon is low.

Also, it does take awhile for us northerners to get acclimated to the heat, but it happens eventually. If you would go back to VT this coming September, you'd probably think it feels "arctic" there with 72 degrees and low humidity!

I bought mine on ebay for less than $25 each with free shipping. Usually, you have to buy 2 at a time to get the free shipping. If you buy them local, they will charge at least twice that.

My home inspector recommends ushomefilter.com where you can buy them for less than $20 each if you buy 3 at a time. Not sure what they charge for shipping.

These filters are changed only once a year.

Tommy,

I found the 1" filters on the website Filters4Life.

Villagegolfer,

I went to Filters4Life and they have the 4" filters listed by specific air conditioners, but these other guys on this post seem to have found sources that are cheaper.

Good question, and good responses.

I've been looking for 2 days for filters. We've probably had the same inspector, because I was told about ushomefilter.com too. I couldn't find my filter on their site, or any other site. I will call them Monday and post how I make out. A friend of mine said that he found someone who will custom make filters, so I will contact him when I get the # and post those results also. The actual dimensions of my filter are 19 1/8" x 19 13/16" x 4 5/16" (19.125" x 19.8125" x 4.3125") and is a merv 8.The model # on the filter is FILXXFNC0021 The merv 11 model #is FILXXFNC0121

I would change it once a month. If it does not looked clogged or dirty possibly the unit is in need of repair.

These are High Efficiency Filters and need to be changed only once a year.

Are you sure about the number? Mine is FILXXFNC0021.

Thanks for catching that. The # I quoted was for a merv 11. I have corrected my original post. Probably a senior moment!

Try this: http://www.ushomefilter.com/filters/...BFNC0021-.html or this: http://www.iaqsource.com/search.php?..._continue=Find

Good link logdog. I didn't pull the trigger yesterday but decided to use your 1st link and I got 2 filters for $62. Thanks

My guess is that you might only be able to cool your house to 20 degrees less than the outside. (Of course depending on insulation, window tinting, etc.) and your unit could be working properly even though the temp got to 78 inside.
You should be able to find your manual on line and see what the specs are.

After 45 days my $12 Sweet Bay filter gets very dirty. I don't understand how I could leave any type of filter in the system for a whole year. What is different about high energy filters? Don't they get just as dirty?

Bueller, Bueller.....Anyone?

GeorgeT- the filter you are buying from Sweetbay is probably only a one inch thick filter while the true high efficiency filters are 4-5" thick. They are made in an accordian style so you get a helluva lot more area of filter- thus they'll last a lot longer than the 1". I don't recommend buying the 1" thick "high efficiency" filters to my customers unless they're prepared to replace them once a month. There just isn't enough filter area in them and they're too restrictive.

Thanks ducati1974. That makes perfect sense. The brackets that hold my 1 inch filter would would have to be replaced if I went with a 4-5 inch filter, right? Or is the perimeter of the 4-5 inch filter 1 inch as to fit under the brackets?