Hi all,

We are working on an existing small project (35,000 SF approx) that is going through a major renovation, where most of its systems are being updated, including new AHUs, however, the project will keep the existing air cooled chiller. Two scenarios come to mind on how to properly assess the project's performance:

  1. Model a Baseline vs Proposed as a regular new construction: baseline type 6, with no changes, and proposed as designed (including old chiller).
  2. Model a Baseline vs Proposed but both with the old chiller: the baseline would be type 6, but for the cooling, instead of direct expansion the coil will be connected to the same, existing, chiller (just as the proposed).

​Any thoughts?

Thank you,