Dedicated Outdoor Air Systems

[Antechs]

What is a dedicated outdoor air system? Where would you find it used in HVAC, how does it work, and what are some of the components that make it make it work? Thanks

[Antechs]

One more question, is there any good sources on the internet that would help me understand what one is?

[local553]

u mean 100% make up air

[pjh008]

Could be talking about make up air used in commercial kitchens.

[Antechs]

The D.O.A.S. was the system that I was asigned for a class presentation. The professor was pretty specific in what he wanted . Though you guys may be right.

[pjh008]

Ask the teacher what application is he using it for. What is he trying to accomplish?

[karsthuntr]

A large book warehouse I work in has Gas heaters with 100% outdoor air. It also has huge make up air fans that they use in the summer. They have no cooling.

[Green Mountain]

A large book warehouse I work in has Gas heaters with 100% outdoor air. It also has huge make up air fans that they use in the summer. They have no cooling.

Probably they are talking about a heat recovery ventilator. (HRV). This is a separate system that brings in and exhausts outdoor air without the use of the buildings heating and cooling systems.

Google "heat recovery ventilators'' and see if this is what you are asking about.

[icemeister]

Try Google.

I did and got this at the top of the listings:
http://doas.psu.edu/doas.html

Very informative.

[acwizard]

What is a dedicated outdoor air system? Where would you find it used in HVAC, how does it work, and what are some of the components that make it make it work? Thanks

Dedicated outdoor air systems are becoming more popular as ventilation requirements become more strict. Unlike a package rooftop a/c unit, a DOAS can handle outside air requirements with less problems. They will often be used in conjunction with package units , VRF systems, VAV , and commercial restaurant designs. They come in all sorts of configurations, heat only heat/cooling,indirect cooiling,energy recovery, etc. To fully understand them ,one must have a good understanding of psychrometrics. I deal with them quite often, as we are a startup company for a major mfg. of these type of equipment.

[dandyme]

mua=blower,motor,burner,boat load of controls



have actually seen 10 ton lennox pkg unit that sucked 100% oda

[foxbeno]

i am in faculty of engineering and my project about Dedicated Outdoor Air Systems
pls some body help me with some books and information

[dandyme]

you will get a better response if you start your own thread instead of riding the coattails of another



internet search is your friend

[foxbeno]

i am not riding the coattails of another friend you just acting like ass

[Texas-Tech]

Carrier, for one, makes a unit for 100% outdoor air, we installed 2 in a school, used to partially cool fresh air and introduce it into the conditioned air ductwork.

[Texas-Tech]

i am not riding the coattails of another friend you just acting like ass

That will get you no where in here.

[ACFIXR]

Here's one I did with heat pumps

http://hvac-talk.com/vbb/picture.php?albumid=2091&pictureid=12261

Find more info here:
http://www.airxchange.com/airxchange-technology.htm

Here is a Outdoor air unit with gas heat to supply outside air to building occupants

http://hvac-talk.com/vbb/picture.php?albumid=2091&pictureid=13172










Here is the Trane linkhttp://www.trane.com/CPS/uploads/userfiles/productpdfs/mua-prc007-en_12042009.pdf

[ACFIXR]

What is a dedicated outdoor air system? Where would you find it used in HVAC, how does it work, and what are some of the components that make it make it work? Thanks



http://www.krueger-hvac.com/lit/pdf/doas.pdf

[foxbeno]

thank you.we will mix the Dedicated Outdoor Air Systems and radiant cooling panals
i want to say thanks you are perfect

[Jarreau]

Try Google.

I did and got this at the top of the listings:
http://doas.psu.edu/doas.html

Very informative.

Nice find !