Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


Deionized Water from Air conditioner

Deionized Water from Air conditioner

Deionized Water from Air conditioner

Hello Friends.

The water that drips from air conditioners can be called "Deionized Water" ?

Any opinions are appreciated


RE: Deionized Water from Air conditioner

No,It is my personal opinion that

unless and until the complete route,consing environment& the container receiving are free of any salts or ionic contaminants.

It may be called fairly low T.D.S.& electrolyte containing water

(as it is from water vapors re-condensation; but not absolutely ion-free)

Best Regards

RE: Deionized Water from Air conditioner

Agree with 786392.

The cooling coil itself has impurities on it and the water runs down the surface of it to the pan or drain. Also, the condensed water has the return air blowing across it, which also adds unknown contaminants. Finally, the pan it falls into before hitting the drain is often a very dirty thing. Mold, dust, and the precipitates from a long duration of dripping water. Many of those precipitates are salty.

It is still very clean stuff, but I wouldn't drink it.

Best to you,

Goober Dave

Haven't see the forum policies? Do so now: Forum Policies

RE: Deionized Water from Air conditioner

Thanks to all. I'm considering the use of this water as cooling water for gas engines.



RE: Deionized Water from Air conditioner

It would be perfectly acceptable as cooling water.

RE: Deionized Water from Air conditioner


Agreeable, subject to due filtration for mold,filth& dirt etc. removal.

Then with needful disinfectants addition indeed!

Best Regards

RE: Deionized Water from Air conditioner

Be careful of what is in the air from which this condensation is coming. Some of it will be in the condensate. I once had the same idea and found out too late that the condensate had tannic acid in it absorbed from the air that passed through the evaporator coil. It made the condensate unusable for our purposes, but we didn't find that out until after we had paid for the system to collect and distribute it. It was a hard lesson.


RE: Deionized Water from Air conditioner

Don't believe that there is any standard for deionized water water, so condensate would probably qualify as deonized. There are some technologies to produce water using this very same method.


Note the air filter, the ozone disinfectant, and the effluent filter. You will also have to disinfect the water (risk of legionella) and it will contain any other air polllutants as well.

It hardly seems like it is worth the hassle to try to do this. Distilled water is very inexpensive.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


White Paper - Considerations for choosing a 3D printing technology
The adoption of 3D printing into major companies’ product development life cycles is a testament to the technology’s incredible benefits to consumers, designers, engineers and manufacturers. While traditional production methods have limitations in manufacturability, 3D printing provides unparalleled design freedom due to the additive method of building parts layer by layer. Download Now
White Paper - Are all 3D printed metals the same?
With so many different 3D printing metal systems and processes today, how can you know exactly what you’re getting? Today, there are several different methods for manufacturing 3D printed metal components with their own strengths and limits. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close