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.
2040463
Purenex FT-1. When I bought this I got the Matrikx Pb1 filter cartridge and it fit perfectly. This one has the same number but is smaller in diameter and is not working.
1848652
I looked at both system filters and they are the same, so no difference I see.
967636
John I would also like to know what it is. However, most of these types of filters I have seen generally have a rating of 3. It's about equivalent to the old fiber glass filters, low dust pickup but high flow. I have a 10x6x1 box (in addition to the others) in my house and it is IMPOSSIBLE to find an actual filter for it. Even the builder put in one of these types of filters. I've been here for 10 years now and haven't had any issues with my system or this type of filter for just this one.
962724
No difference as far as I can tell. Only the color of the case and the plastic stick are different. Originals were blue and these are orange. Same filters.
199842
These are not true HEPA filters; they are HEPA-type filters. True HEPA filters are available at http://www.amazon.com/Holmes-HAPF30D-Replacement-HEPA-Filter/dp/B0045LQCIO.
274848
I have been ordering these for a few years now and my experience has been mixed. Sometimes it comes with the blue plastic wrap and sometimes not. It does not matter to me. I do not see any difference in the filters themselves.
357773
UV(C) passes much more ultraviolet light than UV(0) filters. Additionally, the Pro 1 coating is a little more transparent and easier to clean. Finally, the Pro1 rim is higher quality. See hoya's website below: http://www.hoyafilter.com/hoya/products/generalfilters/uvcslimframe/
16136
I believe the difference is the level of filtration. I use the ez4 b/c It filters out more and smaller contaminant particles
523812
None, you must choose the type of filters based on your specific ned, such as dust, organic vapors, etc.
885403
The difference is that one has HEPA filter and the other one doesn't. If you are going to use it inside a house, the HEPA one is better.
1597689
Yes it is Multicoated. You will see on the ring that is says "Hoya HMC". The HMC is Hoya's designatin for "Hoya Multi Coated". This is a great filter and find myself using it more and more all the time for long exposure shots.
629355
Phil - HCC20-28 is the model number of the filter chassis and HCF20-16 the model number of the filter. Hope this helps.Alan
604201
Might say on your filter housing which filter to use otherwise I'm not sure
1082018
The current filter we are looking at is Merv 11. For higher Merv value, you probably need to look for Merv and FC100A through search engine. Thanks.
1779604
The Merv 11 was the filter that our original installer put in our system. I'm not sure of the difference between the Merv 11 and the Merv 8
286134
There are two different filters the white foam ones and the dark felt ones, I prefer the felt ones