|
Posted by daytona° on April 1, 2007, 7:29 am
1. No
2. at times
3. also at times
>I do not have much of a clue as to how hvac systems work. I have a
> question.
>
> Are commercial hvac systems in large office buildings, shopping
> centres, etc similar to home hvac systems? In particular, do they
> bring in fresh outside air inside? Or do they simply recirculate
> inside air?
>
|