Thanks for the reply. See the link below but change the dimensions to the following. The total building is 1200 sqft (30'x40'). It's a metal building with R13, resilient channel and 5/8" sheetrock on all exterior walls. The metal roof has an R11 blanket under it. There are 2 main rooms to be conditioned. The live room is 23 1/2' wide by 28' deep. It has a cathedral (suspended) ceiling that starts on the 23 1/2' walls at 8' and peaks at 13'. If I figured right the square footage is about 658 sq ft and volume is about 6,909 cu ft. I didn't take into account the angled wall of the vocal booth to keep it simple. Oh and the HVAC is no longer in the corner of the live room. It's now over the hallway near the entrance (the air handler is a horizontal draft unit).
The control room is 14 1/2' wide by 22 1/2' deep. It also has a cathedral (suspended) ceiling. The ceiling starts at the near side (door) at about 10', continues up to the peak at 14' then drops down to the opposite wall at 8'. Again, if I figured right the square footage is about 326 sq ft and volume is about 3,589 cu ft. I didn't take into acount again the angled wall of the vocal booth. Oh and I won't be ducting into the vocal booth.
If I figured right the total heated/cooled sq footage is about 984 sq ft with volume of 10,498 cu ft.
The suspended ceiling doesn't have insulation laying on it. The live room has 18'' of clearance above it and the control room has 8" clearance. The plywood floor over the hall extends over the vocal booth and bathroom so I figured wall registers would be required to the control room due to lack of overhead clearance. I assume the ductwork to the live room would be best with supply registers at the far end and a return register closer to the front near the hall door.
Here's the kicker. I got a 3 ton split unit for a great price. The outside unit is 3 ton and the air handler is 3 ton. I know that's overkill for a building this size but I want to make it work. I'm sure the ducts will have to be pretty large to dump that much tonnage. Also, it won't be running during actual recording as I'm sure it'll be a little windy.
Additional info: Location (if you're using software that lists it) is near Albany, Ga for environmentals. There is only one door (metal) and no windows. On the drawing the exterior wall to your left is North. Lights are: Live Room - 4 flourescent fixtures (4 tube 32W) and four sets of track lights (4 x 40W each). Control Room - 1 flourescent fixture (same as above) and 2 sets of track lights (same as above).
Let me know what additional info you need and I'll get it. My son's band is doing a benefit tonight for a cancer patient so I won't be home until about 1:30 AM.
Sorry this got so long.
Here's the link.
http://www.homerecording.com/bbs/showthread.php?threadid=64775
Thanks for the help
DD