Do I use perimeter baseboard or not

[BronYrAur]

I have a portion of a building that will be turned into a board room. It will be surrounded by conditioned spaces on all sides including above and below, except for one external wall. It's almost 100% glass, probably 25' wide by 10' tall.

Right now the space is served by a constant volume air handler with hot water reheat coils. The external wall also has 2 hot water fan coils standing on the floor.

The intent is to turn the space into a high-end board room ... for a low-end budget. I plan to move some ducts around in order to get enough air into the space to serve the high people and computer loads that I expect. I will probably have 2 zones of air flow with reheat coils - sticking with the existing constant volume unit because it still serves the adjacent spaces.

They would like to get rid of the fan coil units for aesthetic and noise reasons. I am debating whether I should put baseboard radiation in its place or just try to screen the glass with linear diffusers. I know baseboard would be nicer, but how do I control it in conjunction with an overhead system?

Any thoughts?

 

[NCDesign]

Your baseboard heat would essentially be a stage of reheat. You would just need to decide if you want it to be the 1st or 2nd stage of reheat and control it the same way you are controlling the duct reheat coils. If you are doing reheat coils already I believe that a linear slot along the glass would be a better solution. Just make those slots a single zone with the reheat coil and ducting. I would think using baseboard heat would be a better solution if you didn't have the duct mounted reheat coils or if your reheat coil(s) were too small.
A question for you would be what do you plan on doing when this room is full of people and computers in the dead of winter and all the other surrounding zones need heat and this one needs cooling? I don't know the geography or complete system layout so this may be a mute point, but I would suggest taking a look at it.

 

[MintJulep]

That great big cold window will drive a pretty strong convection current in the winter. A linear diffuser in the ceiling blowing in the same direction may make it even stronger.

Baseboard will help to counteract that, and a forced baseboard unit would probably be even better.

 

[willard3]

If you don't want to see the radiation cover, put a 6' wide radiant strip on the floor underneath the window for the length of the window.

Hot air rises and a ceiling diffuser will not counteract the downdraft from the window in cold climates.

 

[ChrisConley]

For aesthetics we frequently use a strip of radiant heating panels along outside walls to replace baseboard.

It's been very sucessfull in curtain wall applications with a -40 deg F design condition.

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