=+4-24. Investigate the feasibility of using 100 percent outdoor in the cooling and dehumidifying of a laboratory whose computed heat gain is 3 tons and whose sensible heat factor is 0.7. The indoor design conditions are 78 F db and 40 percent relative humidity. The outdoor design conditions ure 95 F db and 50 percent relative humidity. The direct expansion equipment to be used for cooling has a fixed air-flow rate of 350 cfm per ton.