This project is a major renovation and conversion of a 10,000 square foot four story multi-apartment residence into a hotel. The renovation called for full HVAC, plumbing and fire protection design to meet all local and state regulations and codes. A 5 ton air-cooled split DX system and air handling unit with a hot water coil was designed to bring in 7,000 cfm of fresh tempered air to meet and exceed the ASHRAE Std. 62.1 ventilation fresh air requirement. The system was designed to ‘economize’; to bring in fresh cool air when outside conditions are favorable thus not requiring mechanical cooling.