whats the difference between the one with the 7 or 9 filters?
1145198
the number is how many inches tall the filters are. the taller one (9") will filter water at a slightly higher rate. when i used one of these, we had 7 people getting ALL of their drinking and cooking water from it (one bathed with it) in a very hot and dry climate. There was never a shortage of water, but i did have it fed by a filthy mosquito larva, bird poop, rat poop infested cistern 24/7 (a float valve prevented overfilling) and the sweet filtered water drained into a bunch of 5 gallon containers. Never got sick.
1350961
Mine is the #2 size and has been fine from day one. Sorry I am unable to offer any knowledge of the #6 version. I like using the #4 filters with my #2 size however.
12011
These are not stronger that 0.9. The strongest filter in the set is 0.8. Hope that helps.
163244
There are two models, a large and a small. I have the large and it uses a number 4 filter.
1894616
There are three filters in the machine. The V5 is one piece of them. You can buy it later when V5 needs replacement.
1607704
i do not know what the difference is between the 2 cleaners. i would assume that the filters would probably be the same. you might try looking on their website (and then order from amazon) or call the company.
1950243
3. :-). It's got something to do with the density of the filter. The higher the number the more tiny the particles it can trap. However, this also cuts down on airflow and will cause your system to need to run harder or longer, which will raise your energy bills. My research into the matter suggested 11 or higher is for commercial/industrial needs. But 8 was deemed efficient enough / recommended for residential purposes. I hope that helps.Dontcha hate it when you ask a question and someone responds "Google it"?
371150
Honestly I dont know. I will just say that I love my unit, very quiet and does the job well. Filters can be pricey (~$70 every 3 months) but well worth it...
962723
I think the only difference is the color...I do not like the Starkey filters. They are too small and plug up quickly. Just sayin'
2141080
From what I understand you can use either filter in the unit. I love mine. I'm using the one that came with it currently, but then bought the better filter in a six pack at Costco.
1896556
Hello Howard If you are purchasing the Hoya NDX 400, you will be looking at a 9 stop reduction. The filter is used very effectively in long exposure photography. Dave
1352499
I believe it is the density of the filter and the 11 would be thicker which takes more dirt and dust out of the air. However, it may restrict air flow I was told. I chose the MERV 8 and they work great.
487790
I found two versions of this filter in my local Sears. One was for threaded setup and one was for non-threaded setup/installation. My vac has threads, so I knew to get the right one. Both were 9-17816. The one I got looks different than the picture here (it has a full ring around both the top and bottom of the filter) So be careful which one you order, I guess.
951505
You really don't need a certain size filter. I use regular size filters by folding them to fit. Works for me!
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.
703781
It is a case of multiple filters. I ordered it many months ago so 6 seems correct but I'm to lazy to go look.
316119
The Filter system requires 2 Filters an A and a B filter. The price is for both filters