The room condition is 26˚C dry bulb temperature and 50 % relative humidity. The outdoor condition is 37˚C dry bulb temperature and 45% relative humidity. The ventilation requirement is such. that on mass flow rate basis 20 % fresh air is introduced and 80 % of supply air is recirculated. The bypass factor of the cooling coil is 0.15. Determine:

i. Supply air flow rate

ii. Outside air sensible heat

iii. Outside air latent heat

iv. Grand total heat; and

v. ERSHF