You are hired to design the HVAC system for the 8th floor of a 20-storey office building that will be built in Halifax. The floor is open concept and the south elevation is as shown in the figure. You divided the floor into five zones also as shown in the figure. FLOOR PLAN N ( 2 SOUTH ELEVATION WALL 4' WINDOW 15' 4' WALL - 100' The following information is provided for Zone #1: The zone is occupied by 20 people engaged in office work from 09:00 to 17:00, with one-hour lunch break between 12:00 and 13:00. The zone has an infiltration rate of 0.3 air changes per hour. The floor is carpeted and there is suspended ceiling. Windows: 0 Aluminum frames with thermal break. Double glazed with 1/4" air space, 15 O Half of the window area is operable the other half is fixed, 100 O Full Venetian blinds. Wall construction: 85x15 Lightweight brick, 50lb/ft density O 1.5" air space O 6" Phenolic foam board insulation with facers 8" Concrete block, lightweight aggr. Perlite cores 1.5" air space 1/2" gypsum plasterboard 1. Explain how zone #5 is thermally different than all other zones. For Zone #1 only, determine the following: 2. The indoor and outdoor design conditions, 3. The ventilation requirement, 4. The design heating load, 5. The design cooling load at 4 PM Solar Time due to people and solar heat gains only, assuming that the latitude is 36N. 6. Determine the temperature at each interface of the wall. Where should the vapor barrier be placed? Explain. 7. As also noted below, the zone has an infiltration rate of 0.3 air changes per hour. What do you recommend to do to reduce the infiltration rate? Why?