Instruction: Evaluate the answerability of a question by analyzing the related document, outputting yes if the document contains information addressing the question, and no otherwise.

Input:
Question: Is this filter for central air systems to be put in vent in ceiling?
Document: This must be a non-standard size because I can't find this size in stores anywhere anymore. It works like an air filter should. The only issue I've had is that I don't think it's actually 24x30. It is a tiny bit smaller. All of the other brands I've ever bought fit snugly into the return but this one leaves a 1/4 inch gap around it when it's in place. While it does cover the return opening it makes it difficult to install since my return is ceiling mounted.
I have looked everywhere for these filters locally and was unable to find them. Glad Amazon came through. Also it was less expensive here. What can you say about an air filter?
This product has a metal mesh that reinforces the filter. It holds up to the strong pull of my one intake on my 4 ton air conditioner.No cons very good product.
Both filters are electrostatic charged.Dust still accumulates in my house with the 3M filter. I have never used standard spun fiberglass filters, so I don't know what the dust difference is. Additionally, I run an Austin air purifier in the bedroom, and an IQ Air filter in the living room. I have 2 other family members, and one dog.I look forward to updating this review in a few months, once a filter has run through a cycle.
I replaced the 3M brand which were a tight fit in my filter opening with these and had to hold it in place while I closed the cover. Three months later I found this filter to be as clean as the day I installed it. For some reason Nordic Pure filters are 1/2 inch smaller on both sides and that is where all the dirty air goes in at. If you need  24x30 buy 24x30,not 23 1/2 x 291/2! Waste of money unless you don't mind dirty air vents!
I had never heard of these filters before or what MERV 13 was. I used to use 3m brand with good success but these filters filter out everything I noticed a big difference in quality of air and the quality of the filter itself. The price you get these for here too are a steal, they go for way more other places. I have five dogs and have to constantly vacuum and try to keep the house clean. At certain time I would even have sneezing fits when the air would kick on but I have noticed that doesn't happen anymore.
We love these filters. Our dust and pollen problem was reduced considerably. Definitely worth the price. We make it a point to change the filters quarterly to keep up the quality of the indoor air.
Oh the love of fresh air. This is not it. The filters take the existing air and simply take the dust and junk out of  the air using the big return air duct to suck it through, Be sure to change them once a month which is less often than a dirty diaper.
If you have lots of pets or allergies I would highly recommend this Nordic Pure filter.
It's hard to judge how well a filter works but it is the size I ordered and the A/C is working well which is important in the Texas Hill country during the summer.
Answer: yes