Include additions and changes in space use
For Vineyard heating and cooling projects, describe rooms added or repurposed since the equipment was installed. The important question is whether the present system and duct arrangement suit the current building.
For replacement, ask whether the proposal includes room-level load review, duct corrections and the controls needed for the selected equipment. For repair, keep the original symptom separate from optional improvements so authorization is clear.
For ductless mini-splits, bring changed floor plans and scope clarity into the scope discussion. Compare a dedicated system for the problem room with modifications to existing central ducts. For multi-zone proposals, ask what happens when only one small room needs conditioning and how the controls coordinate operation.