Objective: To determine and fulfill the requirements for heating, cooling, and ventilation for an Office Building. Deliverables: The owner is interested in knowing what size of mechanical equipment will suffice for the proposed new building. The owners wants an air handling unit (AHU), a boiler for hydronic hot water used for heating purposes, and a chiller for cooling purposes. The owner is requiring the following deliverables to be submitted. Heating Load Calculations Cooling Load Calculations Completed Psych Cart Building: The proposed Office Building is going to be constructed in Ames, IA. The building will be 28,800 SF. It will consist of 3 stories of 9,600 SF/floor. There will be about 275 people working in the space on general office tasks. The building footprint is a rectangle with dimensions 120'x80' with the 120' sides facing north and south. The stories are each 15' tall. On the north and south walls, there is 40% Glass. On the West and East walls, there is 23% Glass. The U-Value of all the windows is 0.450 with a shading coefficient of 0.47. The R-value for the roof is 22 and the roof construction medium construction with 2" insulation and 2" h.w. concrete. Assume a dark roof. The R-value for all of the walls is 11.4. The wall construction is made of 4" face brick, 2" of insulation, and 4" Lw. concrete. The office building will be primarily used for office tasks. Deliverables: Calculate building heating load Calculate building cooling load Calculate supply air CFM Use a spreadsheet for calculations Assumptions: Infiltration AC/hr = 0.3 Winter (Heating Season) Design Temp: -20F Summer (Cooling Season) Design Temp: 95F DB, 78F WB Indoor Air Temp year round: 72F SA properties year round: 55F DB, 52F WB