Replies

1. 
   forestgirl | Nov 25, 2007 07:07pm | #1

   Don, I've had the JDS for a few years now and really like it.  At the time I bought it, JDS had out-performed every other filter that various comparative reviews had considered (Jet, Delta, etc.).  Haven't seen a recent review, but it's safe to assume it's a top-notch performer.

   Don't know about capacity, your shop is about 25% bigger than mine.  There may be some thoughts out there about having 2 in a larger, narrower shop, rather than one bigger one (just a thought).  Did you check the JDS site for some kind of chart showing the size recommendations??

   forestgirl -- you can take the girl out of the forest, but you can't take the forest out of the girl ;-) 

   
   

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   Edited 11/25/2007 11:08 am by forestgirl

2. 
   fishnskiguy | Nov 25, 2007 07:27pm | #2

   donshop,

   I've done a good bit of research on air filtration systems, and the JDS 750 ER is as good as they get.

   I calculate the volume of your shop as 7344 cu ft. The 750 ER puts out 750 cfm of filtered air, which is 45,000 cu ft per hour. Dividing 45,000 by the volume of your shop gives 6.12 air changes per hour, which is more than adequate. My younger brother is a retired HVAC engineer, and he told me code required them to design for a minimum of four changes per hour, so  six is excellent.

   No other air filtration system that I could find matches the JDS units ability to remove 91% of one micron particles.

   I'm about to move into a 1760 sq ft shop with nine foot ceiling so I need to buy the big brother of the 750 ER, which is the JDS Air Tech 8-12.

   My question for others on this forum that may have experience with these units is, how often do you have to replace the one micron filter, and how do you know when it is time to do so?

   Chris

1. 
   forestgirl | Nov 26, 2007 08:10am | #4

   1 micron....isn't that the bag filter?  I thought I once saw an "annual" recommendation, but going back to the web site, not seeing it how.  Here's a quote from the owner's manual:"This filter is not washable.  Only and ["an"??] occasional shaking or light vacuuming is needed."

   I guess if it gets clogged up after awhile, and shaking or light vacuuming doesn't work, you replace it.forestgirl -- you can take the girl out of the forest, but you can't take the forest out of the girl ;-) 

1. 
   BradG | Nov 26, 2007 11:11am | #5

   the JDS, Jet, and Delta all do the same thing: a squirrel cage blower with an electrostatic pre-filter and an internal bag filgter of a fine filter capability. Cool remote, too. I have the Jet for no other reason than someone was selling it for a sawbuck - good deal!

   The  challenge I've found is that the pre-filter is essentially a furnace filter of non-standard size (12x24). At HD there is a nice electrostatic filter system that can be custom cut to size and can be cleaned ... cost $14. That's half of the Jet washable electrostatic filter.

   Definately get one - they rock. My shop is small (just under 20 x 20) and i use it to help circulate warm air from my heater as well. Does an awesome job. Timer, remote, 3 speed ... just like the JDS. Exactly the same size, too. I bet they're all made in the same factory in China.

   I looked the JDS up on Amazon ... it looks like the key difference is the shape of the remote. The charcoal filters really do work, but are pricey. The do a fantastic job of getting all organic odors out (paint fumes, cigar smoke, etc).

1. 
   bones | Nov 26, 2007 05:18pm | #6

   I have the Delta, and I'll bet its about the same as the Jet.  When I was looking to buy mine and did all the research, the JDS consistently beat everybody else on the stats with a cost premium.  At the time, Delta had a great deal going that if you bought two of their big tools they gave you 250 bucks off and a free 690 router.  I was getting the drum sander anyway, so for the price difference, I could not justify leaving that much cash on the table.  The one feature I did like on the delta is a gage on the side that indicates when the filter is getting full. It's a quick visual to take the fileter out and clean it. Government's view of the economy could be summed up in a few short phrases: If it moves, tax it. If it keeps moving, regulate it. And if it stops moving, subsidize it.

2. 
   forestgirl | Nov 26, 2007 08:02pm | #10

   Yes, they do the same thing, but they don't necessarily do it with the same efficiency or effectiveness.  Some units have "weak links" where the dust laden air escapes the cleaning process for instance.  There are other differences --  sorry I don't have an article to cite -- it's been a few years since I've kept track -- but I remember one review in particular that did a very thorough job of testing these unit in working conditions.  There were significant differences between some of the units.

   forestgirl -- you can take the girl out of the forest, but you can't take the forest out of the girl ;-) 

   Edited 11/26/2007 12:33 pm by forestgirl

2. 
   KiddervilleAcres | Nov 26, 2007 05:41pm | #7

   I bought the Pioneer and it has a guage on the outside that tells you when filter cleaning is necessary.  Got a real good deal on it at a woodworking show.  It is supposed to filter down to .5 micron.

   I have it perched above the TS and you can see the swirl of air it generates and I see a lot less dust lying around all over the place.  It too has a remote and 3 speeds and timer.  Since I installed an upgraded DC that filters down to 1 micron, along with the overhead it works very well.

   I do recall someone saying that you want to position it so it blows away from you, so it isn't blowing fine dust in your face all the time.  I also wear a mask too.

   Regards,

   Bob @ Kidderville Acres

    

   A Woodworkers mind should be the sharpest tool in the shop!

   Edited 11/26/2007 9:43 am ET by KiddervilleAcres

1. 
   saschafer | Nov 26, 2007 07:32pm | #8

   Supposedly, air cleaners work best when they're positioned near the center of a long wall. That way, they cause the greatest amount of circulation of air around the shop.

   I have the Steel City 65105, which appears to be nearly identical to the Delta 50-875; the only difference that I can see (besides the fact that the Steel City costs less) is that the timer options are slightly different.

   -Steve

    

1. 
   Ed | Nov 26, 2007 07:53pm | #9

   I have owned a JDS 750 for 5 or 6 years and like it a lot.  I roll it around to where the dust is being created.

   To gauge when it is time to change the internal bag filter, I measured the air velocity on the downwind side of the box with a clean filter installed, and then check it from time to time.  I replace the filter when the velocity is half of the clean value. 

   I measure velocity with a small anemometer. For less money, you could install an air pressure gauge.  Oneida sells them, as do others.  It would be nice if JDS supplied them as an option.

   Ed

3. 
   bones | Nov 25, 2007 11:36pm | #3

   Can't speak to the JDS, but I have the delta.  I run mine when in the shop, and it has a nice timer and remote control.  All you have to do is take the filter out and look at it to make the decision for yourself how much it's worth!

    

    

   Government's view of the economy could be summed up in a few short phrases:
   If it moves, tax it. If it keeps moving, regulate it.
   And if it stops moving, subsidize it.
   
4. 
   PADDYDAHAT | Nov 26, 2007 08:02pm | #11

   DON, I have been setting up a new shop 24x48 under my new house and figured out the DC stuff right away. I had several of the JDS products and was impressed with their quality of engineering, build, fit and finish. I checked out the 750 and the 3hp cyclone (all highly rated) in person and bought two 750's and the 3hp . It was a sale at Woodcraft AND a $  promo from JDS with spare filter bags for the 750's. It was a beautiful thing ha ha .

   With 48' I felt that one 750 was just not enough turn over (were do I put it??) and extra capacity is a big plus in air cleaning for an extra  $170 . The shop is two 12x48 rectangles with garage doors on a short end so one is 15' from the doors sucking up all the saws and sanding blowing towards the hand bench area in the back of one rectangle. The other is at the far end of the other rectangle, 15' from the back wall and 7' in front of the Sentry wood/coal stove sucking up all the very fine dust rising in the hot air and blowing that nice clean warm air down the length of that side towards the doors creating a race track circulation pattern. It took me over a year to figure all this out and the 3hp will not run till I finally move in and get the sub panel set up. I hope this helps, Paddy

    

   
   

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   Edited 11/26/2007 11:04 pm ET by PADDYDAHAT

1. 
   donshop | Nov 27, 2007 06:36am | #12

   Thanks for all of your replies to my questions about air cleaners. I've got a gas heater with a blower hanging in a corner that blows a bit diagonally across the shop. If I get the filter, I think I'll but it on the opposite long wall ceiling so the heater and filter will set up a circular air flow. Does that sound reasonable? I can feel the air moving when the heater is going.My latest project is the barrister bookcase built on the Rockler plan. I was planning to use the plastic slide hinges that Rockler has been selling but the catalog that came a day or so ago has dropped the plastic sliders and offers a new design of roller hinges. UPS delivered them today. I'm a little disappointed with the 9" length that Rockler recomends but will give them a try. I put the first coat of wipe-on poly this afternoon and the case looks dead-on gorgeous. Now if the doors will only install right.