LEED NC rating for Non AC buildings

If you are not installing air conditioning in the Proposed building then put air conditioning in both models but set the temperatures in the cooling season so high that the system never comes on. Since it is a process intensive facility you may need to claim energy savings from the process itself. The procedure to do so has been explained several times within these comments.

The default assumption is that process loads should be identical in both the baseline and proposed cases for modeling. If you want to claim savings within the process load you need to provide detailed information about your approach, and why you believe the proposed savings is justified. You need to be very clear in you explanation of why the proposed approach is beyond standard practice - if possible show examples of similar buildings using the baseline approach. The bar is purposely set pretty high here - the burden of proof is on you to show that what you propose is better than standard practice. As Marcus noted, this has been addressed multiple times in this forum. Please read through some of the previous postings.

The manufacturer or owner stating that they feel that the Baseline is standard industry practice doesn't hurt but is insufficient by itself. As Chris says you need to make the case that the Baseline is a reasonable one. Depending on the situation this could entail a rather lengthy explanation and supporting documentation (i.e. studies, research, etc.).