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.
1593350
No, both go through the same hole. There is a handle that you turn on the unit that switches it to filtered/unfiltered.
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 $.
1848652
I looked at both system filters and they are the same, so no difference I see.
785382
One has a cotton filtration underneath the other does not. Buy the cheaper of the two.
1216376
The box and filter both have a sticker on them that says MERV 10. The box says there is a MERV 13 option that is available.
2078853
Both are available, so you have to watch your descriptions. Typically, only the filter and it slides into the frame that you have. However, if you break the frame, they can be order in tact with a new frame....just pricier.
1598868
I don't know anything about any filters, I'm no help. Hope you can get your answer questioned.
857690
The one I purchased is not like the one shown. Filters in mine were like $50, not worth it. I could get them at my local Oreck Store.
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.
1432889
there are multiple filters available, I use the better grade "Hepa" filter. I get very very little dust when using it to suck concrete dust while grinding / cutting concrete. This dust is very fine and a significant challenge for the unit. When the filter starts to get heavily clogged, then I do see some dust and know it's time to clean out the filter
1394989
The filters (2) are proprietary and only available from Trend. They are high quality foam type filters but I don't think they are hepa rated.I use the Airshield for woodturning and find it to be very effective for air filtration and face protection.
604201
Might say on your filter housing which filter to use otherwise I'm not sure
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.
286134
There are two different filters the white foam ones and the dark felt ones, I prefer the felt ones
2075414
They seem exactly the same in regard to functionality. The only difference I can tell is that this one has a hard plastic shell and the round one does not. This would be useful in cases where liquid can get on the filter or stray sparks could land on it and cause damage (in uses with welding). This one is protected against the elements and will therefore last longer. I'm sure the round filters are fine if well taken care of and not used in environments where they can get damaged. Hope this helps.
827568
According to the user manual, you can use either as they are shaped the same & will install the same way. You just don't get the benefit of the hepa super filtering.