How long do these last and what is the exact measurement?
623582
They should last 6 months continuous use. They are carbon so all they are removing is odor. If you are a smoker then probably not as long, depending on your habit. I have pets and there is no problem with pet odors in the house anymore.
623583
They are the size of a large index card 5" by 9" and fit the unit perfectly. I suspect you will get at least 3 months out of a filter. I have even rinsed them off in a pinch and put back in.
623584
They are six inches by nine inches. I just use two of them to cover the main air filter. I wash mine out every week by hand. They last quite awhile.
623585
Couple months, depending upon your dust levels in your house. I replace it when it starts to look gray from dust. You cna go pretty long just know that the longer you leave it, and the lighter it gets, the less efficient it becomes.
169296
Mine lasted about 3 - 4 hours. However, I used them in my ski boots not regular boots, but I would imagine timing similar. However, I kept mine on low setting. These work OK.
1330091
They are slightly larger. One I bought only lasted 2 charges. I would not buy again
176294
I got these for my Dad & trying to remember how big they are. I think (from what I can recall) around 20 - 24 ". I wish I could be sure. Doesn't the manufacturer tell you?
1066796
They last a long time. I can't tell you how long I had the first one but I know it was at least five or more years.
16185
I really don't know but it's not worth buying. They may last 3-5 times after use. And I think I'm being generous by saying up to 5 times.
1081936
The expiration varies. They last well over a year however. Be sure to store in a suitable location. Hope that helps.
326827
These are exact. I re-measured after I read the other comments. I believe the "8 1/4" diameter in one of them must have been a mistake.
2232308
The Product Info says they're "14.4 x 10.6 x 1.7 inches", but the Description says they are "27 by 27 inches". This is probably why the OP asked the question. I'd also like to know what size these are, if someone who has them and can measure them would be kind enough to answer?
2123259
They last about 4 weeks on our dog. We check each week and replace ones that have fallen off. It has been a huge savings to our wood floor.
238667
They are about two feet in length. I don't have a measuring stick handy, but that seems to be the proper length.
1294265
They are LED so they should lasts for around 50,000 hours on. I have had them for 3 years. I have 12 lighs throughout my home. I have had 1 go bad in that time. The whole thing (light and speaker) went bad.
442322
do you want to know the physical length, as in inches or the length of use; i.e. how long did it last????
2066866
These will last anywhere from 10 to 20 years and very rarely have any issues. There is a 3 year warranty from the manufacturer as well.
957392
I suppose It depends on the amount of usage. But I have had mine since November 13. Used moderately but not heavily. A couple times a week for 30 min to 1 hour each time. I like them. If I could afford the $40 a piece ones I would get those over these any day. But for the money they do what I need them to so and so far no sign of wear.
63158
mine have about a year as an expiration date. If you want an exact, I'd have to figure out when I purchased but I'm sure it is around a year.
2135019
Little more than 1/2 as long as if they were new. Beware though, you have to monitor batteries while charging. (check on them every couple hours) Some will unexpectedly leak and they can get quite warm while charging.