Carbon Filter

Works as intended. No complaints here.

These filters are great! I have an older Holmes HAP8615 and had some difficulty finding HEPA filters, and these carbon filters in stores anymore. Amazon came through having both, and at a decent cost too. Carbon filters need to be replaced much more often then HEPA filters do, every month or so. So a pack of four being only a little over a dollar a filter is a reasonable price in my book. I've seen them on other sites for up to $20 for a four pack, so I'm very happy that these are priced as they are. I have severe allergies, asthma, and live in an apartment where the previous occupant smoked so air purifiers are mandatory for me. I run them hard, 24/7 365. I normally change my carbon filters about ever 2-3 weeks, but I've also found that I can rinse them off with some cold water, let them dry, and then replace them in the purifier to make them last even longer without a problem. I highly recomend using a carbon filter with your HEPA filter as well, since they lengthen the lifespan of your HEPA filter, and those are a lot more expensive then carbon filters are! All in all these are good filters, at a great price!

I have several HEPA air purifiers in my home. They run 24/7/365. I used to buy these from a large retail store in my area. Sometimes they would have them and sometimes not which would put me into a treasure hunt mode of looking at other retailers. I finally was smart about it and looked on Amazon. YES! Not only can I simply click and order them but they are cheaper. They work great. They are the exact same thing I was paying more for and feeling frustrated at trying to find. I am so grateful to have these available and I have them delivered through Amazon subscription. It is an easy reminder to change them out when they arrive. If you replace them regularly your HEPA filter will last longer.

These are very good pre-filters but $34 for four? The last time I bought them from Amazon they were only 6.59 for four.

I have 2 of these true HEPA filters in each of my big Holmes air cleaners. Holmes air cleaners are not expensive. 1 air cleaner on the ground floor, and 1 in the basement. I got almost 2 years out of my last batch. Completely eliminated my sinus pressure and headaches. I was taking ibuprofen (with calcium powder or milk to buffer the acidity) 5 or 6 times a day before my current air cleaner system. Smaller air cleaners by themselves in a few rooms do not do the job. Air cleaners have to cover the whole house so that there is no possibility of becoming sensitized. I also have a smaller true HEPA Holmes air cleaner in my bedroom. I have 4 MERV 13 filters from Zoro in my central heat and air. They are not enough by themselves to stop the sinus problems since the system fan is not on all the time. The only way to stop the nasal sensitivity is full 24/7 air cleaning of the whole house. I lived with sinus problems for decades. Once my nasal passages and sinuses are sensitized anything will set them off. Smells, mold, any dust, any pollen, etc.. I also have a dehumifier in the basement. It also is essential. If the humidity gets above 50% I am back to sinus problems due to the mold in the basement being spread around the house. MERV 13 filters aren't enough to stop all mold. Mold spores are tiny. The air cleaners take awhile to clear out the mold being spread from the vents. So I get sensitized. If you have allergies or sinus problems you probably know what I am talking about concerning being more easily set off at times.

Was looking for these forever at the local home improvement stores and department stores to replace the filter in a Holmes model that I've had for years now. Was sure I'd have to chuck the thing. Happened to check Amazon and—voila! These fit perfectly and all is well again—filter is running fresh once more, with clear airflow. Replacement carbon means you don't have to have that dusty yeech on the front of the unit either, you can replace all the consumables at once. Don't forget to reset the unit after inserting the new filter, so that the monitoring is reset and you have a filter indicator that works again!

I've been using Holmes products for decades and they work great. I replace the HEPA filters at least once per year and the carbon filters every three months or so. Another customer was frustrated because these are sold separately, not with the carbon filters, and was also annoyed that the HEPA filters were sold in a pair when they needed three. This customer doesn't realize perhaps that they sell smaller units that only use two HEPA filters. Some even use one. Also they are sold separately, not with the carbon filters, because the carbon filters need to be replaced much more often. Just make sure the seller is reputable. There are companies that make knock-offs and I don't recommend those. If you do get the knock-offs make sure they cost much less.

Fits my Holmes air purifier exactly as it should. Does the job. Odor elimination is not an issue where the air filter is used, so can't comment on that. Very helpful in cutting down allergy symptoms at this time of year (spring, summer). I was confused about the meaning of all the numbers and letters in the model designation (HAPF600DM-U2) . Apparently the 600 is for the size of the filter (ie what air purifiers it will fit); the DM has to do with what it's particularly good for and the U-2 means there are two of the filters in the package.

great, price right brought air filter back to new.

For the price I expected the filter set

We love this product. Thank you for your help.

Not the size of an AER-filter (as suggested by a picture) but a bit bigger - but it's easy to cut so it works perfectly. I have a Sunbeam air purifier with AER filters, and it is not meant to have an extra carbon filter, but it still works if you can manage to close the purifier :)

Fast delivery, good price, very god quality.