cst : simulation of a room

Hi, i need to simulate five wifi antennas in a room 5x6 meters and 4 meter in height.
Is it possible (with cst) to simulate this great environment or the number of the cells maybe too high ?
Thanks

If your room is surrounded by metal, you can use perfect electric boundary all round with vaccum to represent your room size. The computing resources will be determined by any fine details your wifi antennas have or perhaps you can use a equivalent source for the antennas.