×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

Jobs

FLOOR/CEILING MINISPLIT FOR CLASSROOM APPLICATION

FLOOR/CEILING MINISPLIT FOR CLASSROOM APPLICATION

FLOOR/CEILING MINISPLIT FOR CLASSROOM APPLICATION

(OP)
Dear friends:

I am designing a classroom HVAC System where the client previews install floor/ceilng minisplit systems instead a ducted split unit.

The room is 8.00 TR Thermal Load and will have twenty PC.

I am not sure that use minisplit systems is advisable, because of their lack for:

1.- sending the cfm required (423 cfm/TR)
2.- admitting fresh air as fan-coil or AHU can do it.

What has been your experience using this kind of system for classroom applications?

Thaks,

schola

RE: FLOOR/CEILING MINISPLIT FOR CLASSROOM APPLICATION

In addition to your concerns there's the matter of noise.
ANSI/ASA Standard S12.60-2002 sets an aggressive goal for noise levels in classrooms.
To meet the standard, school designers will need to look at all sources of noise in a classroom . external sound sources from traffic or flight patterns, noise from adjacent spaces, and sound sources within the room.

In-room  HVAC  systems can consist of unducted unit ventilators, fan coils, PTACs
packaged terminal air conditioners, and minisplit ductless air conditioning units. Avoiding
these systems is the best option, acoustically, since it may not be possible to meet S12.60 with
in-room systems.

Near-room HVAC systems can be an effective S12.60 solution. Near-room systems can include
ducted unit ventilators, fan coils, water-source heat pumps, and single-zone rooftop units.
Typically, four ceiling diffusers . spaced out evenly  are needed to meet the 35 dBA. A weighted decibel value standard for the average classroom.

RE: FLOOR/CEILING MINISPLIT FOR CLASSROOM APPLICATION

Suggested manufacturers are:

Daikin, Mitsubishi and Toshiba.

I would imagine the noise level in a class full of 20 PC's is pretty noisy anyway.

I think Carrier have just linked up with one of the above?? so you chappies in the USA can get them via your Carrier agent.

Friar Tuck of Sherwood

RE: FLOOR/CEILING MINISPLIT FOR CLASSROOM APPLICATION

I have used a mini-split system as supplementary cooling for the computer classrooms.  The base HVAC system provides the necessary ventilation.  The split unit deals primarily with the sensible load in the space  (there is also some latent cooling).

Carrier and Mitsubishi do have a ceiling module that can have ventilation air ducted directly to it.
 

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!


Resources