Energy Recovery Ventilation, Preconditioning, Reheating
This paper discusses the Heating, Ventilation, and Air Conditioning (HVAC) system designed as part of amajor renovation project to the historical San Antonio building that serves as home to the U.S. Army Band known as “Fort Sam Houston’s Own.” The HVAC system design provides an innovative new heating and cooling system intendedtosaveenergyandgivethefacilityamoresustainablelong-termlife.ThefacilityislocatedinsouthTexas and was originally cooled by multiple two-pipe indoor air-handler units fed by an air-cooled chiller and gas-fired boiler. Outside air was provided to the air handlers from window louvers and roof vents. Such a ventilation approachisnotrecommendedbytheU.S.DepartmentofDefenseUnifiedFacilitiesCriteria(UFCs),theAmerican Society of Heating, Refrigerating and Air-Conditioning (ASHRAE), or industry standards. The new system relies instead on aDedicated OutsideAirSystem (DOAS),Fan CoilUnits(FCUs),and energyrecovery wheelstobring thebuildinguptomodernstandards.