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-   -   Are there any air units with builtin dehumidifiers? (http://www.diychatroom.com/f17/there-any-air-units-builtin-dehumidifiers-41377/)

abefroman 03-29-2009 07:25 PM

Are there any air units with builtin dehumidifiers?
 
Are there any air units with builtin dehumidifiers? Or dehumidifiers that work with the hvac system?

I live in Florida.

Plumber101 03-29-2009 07:29 PM

Um I use the a/c for that.

What are you trying to accomplish?

abefroman 03-29-2009 07:34 PM

In Florida it is very humid, even with the AC running, especially during the winter, when the AC isnt running as much.

Im trying to reduce/control the humidity.

Thx

Plumber101 03-29-2009 07:40 PM

Sure I understand. But from what I read you have some sort of HOA rules or do not have the space for a condensor.

By placing just a dehumidifier and not conditioning the air you will have just dry hot air.

Depending ano the area s that needs to be conditioned you may not have a large enough wall unit. I was just suggesting a PTAC unit as something to look into.

beenthere 03-29-2009 07:41 PM

First thing to do.

Is seal your apartment/condo.

Reduce the amount of fresh moist air coming into your place.

Next, since your on a chilled water fan coil, slow the blower down. The A/C will remove more moisture then.

You want long run times when its set to cool your place.

If that still isn't enough.
Consider a SantaFe whole house dehumidifier. You can run it winter and summer.

abefroman 03-29-2009 07:43 PM

Im not really sure how it works, I guess there is a water cooling tower on the roof, that sends water down to my AC unit, and create cold air somehow. The fan and A coil are my personal ones inside my unit. Was looking for a duhumidifier to work into that.

abefroman 03-29-2009 07:44 PM

Quote:

Originally Posted by beenthere (Post 252177)
First thing to do.

Is seal your apartment/condo.

Reduce the amount of fresh moist air coming into your place.

Next, since your on a chilled water fan coil, slow the blower down. The A/C will remove more moisture then.

You want long run times when its set to cool your place.

If that still isn't enough.
Consider a SantaFe whole house dehumidifier. You can run it winter and summer.

Thanks! Will check that out.

abefroman 03-29-2009 07:46 PM

Quote:

Originally Posted by beenthere (Post 252177)
First thing to do.

Consider a SantaFe whole house dehumidifier. You can run it winter and summer.

Question, I went to their website, does this work with my existing duct system?

yuri 03-29-2009 07:47 PM

Depending on the space you have, several companies make bypass dehumidifiers that attach to your ductwork;
http://www.aprilaire.com/index.php?z...tegory=dehumid
Generalaire makes them too.
http://www.generalaire.com/catalog/c..._Dehumidifiers

abefroman 03-29-2009 07:48 PM

Quote:

Originally Posted by yuri (Post 252183)
Depending on the space you have several companies make bypass dehumidifiers that attach to your ductwork;
http://www.aprilaire.com/index.php?z...tegory=dehumid
Generalaire makes them too.

Yep, I have a little extra space, I'll check that out.

THX

yuri 03-29-2009 07:51 PM

Check out the generalaire, I added the link to my other post. I am sure the guys will add a couple more brands. I was in Orlando and gawd you guys have humidity and fantastic lightning shows.

hvaclover 03-29-2009 08:59 PM

JJeezz you Ontario guys are easy to impress:no::laughing:

beenthere 03-30-2009 04:27 AM

The Santafe's are stand alone.
But, thermostor does have ones that tie into the duct work, if you have enogh room.
Aprilaire and others also make them.

C44 03-30-2009 05:56 PM

Try before you buy?
 
The voices that say the AC is supposed to remove plenty of humidity (during the summer at least), that to me sounds like some sort of ideal. How is that working for everybody?

If you can find things to try to fix the AC before you put in a dehu, that would keep the dehu from being a band-aid on a lousy HVAC system. All the professional voices saying to adjust airflow downward, to fix air leaks in the ductwork and/or building envelope, those sound like the voice of wisdom to me. You may end up paying more than a dehu would cost, but that would address the "real" problem.

Is it permissable to discuss pricing on this thread? I know most HVAC pros who install a dehu are not getting rich off it, but their cost structure must be crazy high to get up to the quotes I have seen. Prepare for sticker shock if you get a quote on a whole-house dehu. Stand alone models all seem to be much cheaper, the problem then is to get the equal functionality.

I would exhaust all the other possibilities first, and then consider a "trial version" dehu before putting out the money for a really good one. For a couple hundred you might consider a stand-alone cheapie from Home Depot or the like. Put it in your home and see if you like what does, see if you want more. If yes, then you have spent only a couple hundred to try, a small number in the whole scheme of things. Something like the Thermastor Santa Fe models will have maybe 3X the pints/day capacity, yet much better efficiency and therefore less waste heat. Look up "PINTS per KWH (kilowatt-hour)" for any model you consider, it will be an eye opener.

Some other brands consume twice the electricity of the equivalent Thermastor, but is that a deal killer? If it costs $30/month to run an appliance, is it important that it be high efficiency? Is efficiency worth a high initial price? You tell me. I am curious as to your opinions on this.

Hope this helps -- C44

yuri 03-30-2009 06:05 PM

Fixing air infiltration is important. Sounds like he has a chilled water coil and those are not great for dehumidifying as they do not run at nearly as cold a temp as a freon type. In condos there may be restrictions as to what you can tamper with and do to the structure. Need to be careful and talk to the board.


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