Thread Number: 80689  /  Tag: Modern Dishwashers
New Bosch Crystal Dry
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Post# 1046711   10/3/2019 at 07:42 (1,610 days old) by kakidd (Texas)        

Anyone have one of these yet?

Post# 1046713 , Reply# 1   10/3/2019 at 07:54 (1,610 days old) by Frigilux (The Minnesota Prairie)        

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Hadn't even heard of it. Here's some information on this new drying feature on upper-end Bosch dishwashers.

Who'd have thought that providing heated, moving air at the end of a dishwasher cycle would help dishes get dry?😂

Some of us are old enough to remember having to open the door to let the dishes cool down for awhile before you could even handle them.


This post was last edited 10/03/2019 at 08:26
Post# 1046714 , Reply# 2   10/3/2019 at 08:19 (1,610 days old) by coldspot66 (Plymouth, Mass)        

Everything old is new again!!!!! It's all been done before!

Post# 1046715 , Reply# 3   10/3/2019 at 08:26 (1,610 days old) by toploader55 (Massachusetts Sand Bar, Cape Cod)        

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Let's see.... Wasn't there a Company named Hobart that made a dishwasher called I think KitchenAid back in the 50's that had the feature of a fan and heater to dry dishes called Flo Thru Drying ?

And these Geniuses think they're onto something ?

Just like musicians... Remaking Old songs. Zheeeeeeeesh.

Post# 1046716 , Reply# 4   10/3/2019 at 08:44 (1,610 days old) by Frigilux (The Minnesota Prairie)        

frigilux's profile picture
I don't mean to knock Bosch; they make a great dishwasher. A neighbor across the street has one from the 800 Series and he loves it. He says it does a great job on pots and pans. I've been over there when it's running and it's even quieter than my 2014 TOL GE back at the house. Truly almost silent.

Even though those of us who have been around for awhile can poke fun at these "new" developments, I'm glad Bosch is at least addressing the issue of poor drying with good old-fashioned heat and moving air.

I use only the 1-hour cycle on my noisy Whirlpool portable, which has no drying period. The 'Clean' light comes on as soon as the final rinse water has drained. I just push it back to its spot and open the door a few inches. Fifteen to twenty minutes later things are dry for the most part. Not plastics, of course, but everything else is good-to-go.

Having said that, it's nice to be provided the option of choosing to have the dishes (including plastics) completely dry when you open the door at the end of the cycle.

Post# 1046724 , Reply# 5   10/3/2019 at 10:25 (1,610 days old) by kakidd (Texas)        
More Info

Sounds interesting


Post# 1046726 , Reply# 6   10/3/2019 at 11:29 (1,610 days old) by foraloysius (Leeuwarden, Friesland, the Netherlands)        

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Well, if you read the article and understand the technogoly this is definitely something different than a heater and a fan. European dishwashers have come for many years with fans (and heaters until the flow through heating elements), so Bosch wouldn't present that as new.

Post# 1046751 , Reply# 7   10/3/2019 at 15:36 (1,610 days old) by Logixx (Germany)        

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What Louis said.

Post# 1046753 , Reply# 8   10/3/2019 at 15:57 (1,610 days old) by henene4 (Heidenheim a.d. Brenz (Germany))        
Zeolith drying

Have such a system in my DW running here right now.

This technology is 100% not anything you guys are thinking.

Far smarter, far more efficent, far better at drying.

Been over here for what has to be a decade already...

Zeolith is a mineral with a huge surface area.
Like, insanely huge.
Incredibly porous that stuff.

At the begining of a dry cycle, dishes are allowed to drip dry and to saturate the air with moisture for about 5 minutes.

Then the fan starts and blows the air through the mineral back into the dishwasher interior.

The moisture condenses onto the mineral.
Because of the huge surface area, water condenses onto the mineral even if the mineral gets pretty warm.

When ever moisture condenses a lot of energy gets transfered.
Like, a lot.
That's the reason why steam scalds so quickly.

That heat is taken away from the mineral by the moving air that is now dry.

Rinse repeat from there on basicly.

While heat transfer is pretty efficent, the temperature won't increase much if even any.

Now the mineral is wet once the cycle ended.

And here is where it gets really genius.

There is a heater embeded in the mineral container.

At the beginning of the next wash cycle, the fan and that heater are engaged while the prerinse is running.

The water evaporates from the mineral and is condensed back into the wash water.

Thus, the heat used to dry the mineral is used to up the wash temp.
Basicly, it is just recycling the energy.

The heating power for that heater is something like 200W or so if I am not mistaken (I think I read somewhere that it's 30 Ohms at 50V).

Bashing technology before knowing anything about it, I thought we all learned what prejudice yields smh...

Post# 1046756 , Reply# 9   10/3/2019 at 16:51 (1,610 days old) by chachp (North Little Rock, AR)        
Interesting concept...

chachp's profile picture


My Bosch 800 Series does a pretty darn good job of drying especially if I use the Extra Dry option.  I wonder why it's taken them so long to introduce this concept here?  Is it because there seems to be a real focus the past few years on how dishwashers dry the dishes?  Seems many of the big manufacturers are now touting how well their machines dry the dishes.  How long do these minerals last?  Do they have to be replaced at some point?

Post# 1046761 , Reply# 10   10/3/2019 at 17:20 (1,610 days old) by henene4 (Heidenheim a.d. Brenz (Germany))        

No, the mineral it self dosen't wear down.

What can fail is the heater and or fan and on the first iterations of this system they regulary did usually due to moisture ingress.
In a bad case they can take out the main control board with them.

The newer iterations seem better durability wise.

The thing is that here they use it for efficency reasons where the extra cost makes sense.

With cold water connection over here you save about 100Wh per cycle. If you run a cycle a day, that adds up to dozens of cycles "for free" per day.

With hot water connection, the whole system makes less sense efficency wise, and drying results wise you can get simmilar enough results with less complicated systems.

But the system really is unmatched from my experience over here.

Post# 1046766 , Reply# 11   10/3/2019 at 17:58 (1,610 days old) by eurekastar (Amarillo, Texas)        

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I also own an 800 series Bosch dishwasher and have no complaints about how it dries.  Glassware is always spotless too.  I'm always puzzled by people who make negative comments about it.  It makes me wonder if we're talking about the same dishwasher. 

Post# 1046780 , Reply# 12   10/3/2019 at 20:59 (1,610 days old) by lakewebsterkid (Dayton, Ohio)        
Drying performance

My Bosch actually dries better than my old Whirlpool did with Sanitize rinse and heated dry ON! I too wonder what machines people are using. We have moderately hard water, and our glasses, silverware, and cups have never looked better. Rinse aid is at the lowest setting. Whenever I visit another persons house and see their silverware, it makes me quite proud to have this great machine!
-Happy Bosch DW owner.

Post# 1046781 , Reply# 13   10/3/2019 at 21:05 (1,610 days old) by peteski50 (New York)        

peteski50's profile picture
I am a new owner to a Bosch 300 series DW! The drying performance is fine and everything comes out sparkling clean and dry. I use the finish jet dry! I knew when I purchased this DW it doesn't utilize a drying heater and it is dependent on a rinse aid! Even the dishwashers with utilize heating dry cycles have had complaints about drying! So far I am a Happy :) Bosch owner without Crystal Dry!

Post# 1046807 , Reply# 14   10/4/2019 at 07:47 (1,609 days old) by Frigilux (The Minnesota Prairie)        

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Louis, Alex and Henrik: In defense of the commentary in my first post (Reply #1) as well as the comments in Replys 2-4, here's the paragraph from the CNET article I linked in Reply #1.

"New high-end (Bosch) models will be getting a feature called CrystalDry starting this fall, which heats the moisture in the dishwasher after a run to 176 degrees Fahrenheit. The hot air is then circulated gently to heat away the water remaining on the dishes."

It says nothing of the technology which makes that system work; merely that air warmed to 176 degrees is circulated to dry the dishes.

Thanks to original poster Mark, who in Reply #5, and Henrik in Reply #8 provided specific information as to how the 176 degree air is circulated to dry the dishes.

This post was last edited 10/04/2019 at 08:18
Post# 1046817 , Reply# 15   10/4/2019 at 09:07 (1,609 days old) by foraloysius (Leeuwarden, Friesland, the Netherlands)        

foraloysius's profile picture
Eugene, true, but there was a link in the article to more information on the new dishwashers, including the Bosch technology. When you make a point about something, perhaps you want to make sure that you know what it is about.

Post# 1046820 , Reply# 16   10/4/2019 at 09:22 (1,609 days old) by Frigilux (The Minnesota Prairie)        

frigilux's profile picture
Point taken, Louis.👍

Post# 1046822 , Reply# 17   10/4/2019 at 11:10 (1,609 days old) by lakewebsterkid (Dayton, Ohio)        

Iím sure that a sanitize rinse and crystaldry combined would guarantee everything is dry.

Post# 1046838 , Reply# 18   10/4/2019 at 15:44 (1,609 days old) by Rolls_rapide (.)        

... it is just a rebranding of the tried and tested Bosch/Siemens Zeolith technology.

Let's face it, 'Zeolith' probably means sweet Fanny Adams to the general public, hence the reason for rebranding it to something with meaning. 'Crystal Dry' says it all. Simples.

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