Filtes: What is the difference between an HMC filter and one that is not HMC?
151670
Hoya Standard filters have one layer of anti-reflectant coating to each surface of the glass to suppress reflection and increase light transmission. HMC (Hoya Multi-Coated) have 3 layers of anti-reflectant coatings on each surface to reduce average reflection down to 3.0% or less. Hoya S-HMC (Super HMC) also have 6 layers of anti-reflectant coatings. Finally, the Super HMC PRO 1 is made of thinner glass (only 1mm thick), also with 6 layers of anti-reflectant coatings bonded to each surface of the glass.
523812
None, you must choose the type of filters based on your specific ned, such as dust, organic vapors, etc.
1859369
With the Filtrete material that I received recently, the instructions do not say anything about how to place the filter material so that one particular side faces the oncoming air and therefore the other side faces the outgoing air. I cannot see any difference between the two sides of the material that I received most recently, i.e. the reinforcing mesh is either on both sides or is centered. I vaguely seem to remember that several years ago, the instructions used to differentiate between the two sides and I could see that the reinforcing mesh was on one side rather than on both sides or centered. I'm assuming that you received your FIltrete material recently and the two sides seem identical.
351237
They should eventually go away. Your h300 is a .25 micronfilter. The elf-5m-kdf-p is 5 micron, it will allow much larger particles through. If they are white it may be calcium. Harmless go nack to the h300 much better filter
604201
Might say on your filter housing which filter to use otherwise I'm not sure
717168
This is what it says on the Filtrete website: "Advanced and Standard replacement filters are interchangeable with System"
1597690
Good question and something I had not looked for when I purchased the filter since it has become customary for all high end filters to be Multi-coated. I had to go to the Hoya website and saw that the filter is designated as DMC (Digital Multi Coated). I have always had good results with Hoya.
1133170
Don't know, I got rid of both filters, they sucked, both leaked from day one. Piss poor molding on the too half. Don't buy it
1217365
I Really don't think there is a difference. I good pop filter is a good pop filter. Either it works as advertised or it doesn't. This one works.
2226590
I use the ceramic filters. At the time they said the red cross and unicef used them. That was good enough for me. I also read a review that said the stem on the black filter broke easy. I don't know if that was true, but I didn't have the money to try it to find out. I prefer tried and true. I LOVE my Berkey with the ceramic filters and they are very easy to clean. One of the best investments I've made for me and my family.
765366
I recommend you try the filters from HEPAairdirect. In my opinion they are better quality filters with aluminum not styrofoam housings, made in the US and less expensive than IQair.
674174
This uses the standard regular basket shaped filters. Sorry if that doesn't help, I'm not sure if it's a numbered thing like other filters.
2128938
I purchased this filter to use with a Shop Vac Hang Up Mini, which appears to be similar to the 500x. My vac originally came with a foam sleeve, paper filter and mounting ring. I replaced the paper filter with this one (still using the foam sleeve and mounting ring) with no issues. Hope this helps.
830803
The filter basket (the plastic basket that holds either a disposable paper filter or a permanent filter) is included, as is a filter disk. Paper filters are easy to find, and I think I recall that 1 was included. The permanent filters work well, and may be worth the few extra $.
2011472
Buyer beware as there are a TWO different filters being sold under the SAME basic HC-504 nomenclature. The original/good version is 1.25" thick, whereas many of the more recent offerings are only 0.75" thick, therefore with MUCH less moisture-delivering efficiency/life, yet at the same price. Worse yet, often the images shown in Amazon are dimensionally proportional to the original/good ones but what they really ship is the inferior version - I know because I just returned six filters to Amazon but got stuck with shipping charges and wasted time. Someone else suggested another source (filters-now dot com) and I'm sending them an inquiry based on the above. (PS- some of the filter offerings tout a blue "dust catching" wrap that IMHO is pure marketing hype.)
1593350
No, both go through the same hole. There is a handle that you turn on the unit that switches it to filtered/unfiltered.
365173
I think the main differences are a better filter and digital controls. But you can do a comparison on their website to make sure.