Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: what are measurements of this hepa filter for the AP 300PH? I am looking for an alternate filter for RabbitAir BioG
Document: This is a fantastic buy! I had my AP-300PH for close to a year, and I just now how to purchase a True HEPA replacement filter for it! Amazon makes buying and replacing items very easy and I am very grateful to be able to have items delivered to my home so quickly! Thank you Amazon!
I bought this to replace a filter for the winix 9500 I own because we all know how their replacement filters cost $80 or more. This is GREAT & CHEAP alternative to winix's expensive filters.For winix owners: this AP-300PH replaces this filter case: Winix 119110 Ultimate Replacement FilterInstalling these are a bit difference as you don't need the case that was included with your winix.
I have had a Fellowes Quiet Air Purifier with True HEPA Filter (AP-300PH) and while the filters are supposed to last a full year, I must admit that we subject this device to brutal conditons. It is in a room where people smoke cigarettes and the air is generally bad.The light indicating the filter needed replacing activated, not shocking anyone. Actually we were expecting it to do so much earlier than it did. Removal of the old filter and replacing it with the new one is very simple.
I haven`t used this replacement filter jet but must praise the original filter in my AP-300 Air cleaner. Just love.. love... love... this machine. My air in my bedroom has never been cleaner and my allergies are much less. So pleased to have made the purchase of my two air cleaners plus filters. Katerelvis
If any of you have seen the price for Winix hepa filter with carbon which is around 65 dollars. I can vouch that this filter is a perfect match for the Winix air purifiers. You can then just buy the cut to fit carbon pre-filter on this site. Which has enough to cut several carbon filters for the Winix. Just double them up to get the same thickness as the original winix pre-filter.
I own 2 Winix Plasmawave 5300 air purifiers and even though I love these purifiers, it was getting too expensive to replace the Hepa filter in them. Another customer on Amazon suggested that these Fellowes filters would also fit/work in my Winix air purifier. I looked on Wal-mart's site too for these filters and saw where another customer had also stated she used them in the same air purifier that I have and that they fit perfectly.
This is the brand-name item, and was exactly what I was looking for when I ordered it. No worrying about the fit or quality.
It fits my hepa so yeay! half price filters!
I've had the 300PH Air Purifier now for several weeks and have found it to be very helpful for my allergy problems at night. We like to have air circulating in the room and also I sleep better if we have some sort of white noise in the background. We had used a regular fan for several years but I seemed to wake up in the morning all too often with a congested nose.
I found no difference in air quality when using this filter instead of winix's more expensive filter. Buy this!
Answer: 16 3/8 x12 5/8 x 1 1/4 thick