It's no secret that 13-SEER unitary products will take up to 40 percent more space than the lower-efficiency unitary products that may make up the bulk of what you are selling today. As we've been saying for a few months now, it's time to take an honest evaluation of the amount of space you as a contractor have for equipment storage and figure out how much space you will need to find.
At this point, it may be in your best interest to look for a space-organizing consultant to hire in order to help you make quick, short-term progress. At least, you need to dedicate one person on your staff to make an assessment of your current space and anticipated operations needs.