Interior Conference Rooms
Interior Conference Rooms
(OP)
I'm new. I Love this forum and think its a good spot to throw ideas around.
This is probably an age old problem. I run into this on almost all my office space projects. The dreaded interior conference room. The cooling loads for these spaces are always way low, and the ventilation requirements are way high. The room I'm working on right now requires 350 CFM of cooling and 300 cfm of OA! Seems like these areas always screw up my ventilation for my central air handling units, requiring a high percentage while the rest of the building takes ~15% overall (via IMC 2000 code standards). I implement the Multiple Spaces calculation (IMC 403.3.2), but the fraction of OA is still too high (around 50%).
Seems crazy ($$$) to me to put in a dedicated unit for this area which would be almost 100% OA, and this solution will leave me open to criticism from clients and contractors alike.
I'm sure this is a common problem. Anybody got the common solution?
This is probably an age old problem. I run into this on almost all my office space projects. The dreaded interior conference room. The cooling loads for these spaces are always way low, and the ventilation requirements are way high. The room I'm working on right now requires 350 CFM of cooling and 300 cfm of OA! Seems like these areas always screw up my ventilation for my central air handling units, requiring a high percentage while the rest of the building takes ~15% overall (via IMC 2000 code standards). I implement the Multiple Spaces calculation (IMC 403.3.2), but the fraction of OA is still too high (around 50%).
Seems crazy ($$$) to me to put in a dedicated unit for this area which would be almost 100% OA, and this solution will leave me open to criticism from clients and contractors alike.
I'm sure this is a common problem. Anybody got the common solution?





RE: Interior Conference Rooms
In your calculations are you assuming that the space is occupied the entire time? You probably have the same occupancy throughtout the day in the overall building, with people migrating to the conference area. The conference room is essentially flushed with ventilation air when it is not occupied and there should be somewhat of a lag between when it is occupied and when the air in the space is no longer providing sufficient ventilation.
RE: Interior Conference Rooms
How does one implement a dual duct box to meet ventilation? Aren't these used in hot/cold deck applications?
I like the idea of a transfer fan with a wall switch, but do code officials buy this design? Do I ignore the specific ventilation required for this area in my vent index?
I suppose I could even control the transfer fan with a CO2 sensor and make it completely automatic.
RE: Interior Conference Rooms
I have personally done the CO2-controlled transfer fan / exhaust fan deal. Worked great, and the local code folks said it was OK too.
Good luck with it!
Old Dave
RE: Interior Conference Rooms
RE: Interior Conference Rooms
RE: Interior Conference Rooms
I would like to meet the code official who looks for ventilation air.