A PTAC unit is to be used in a dorm room. The cooling load is $7000Bt\frac{u}{h}r,$ and the

design conditions are $105F$ outdoor air and $75\frac{F}{63}F$ dry bulb$/$wet bulb indoor air

temperatures.

a$.$ Select a model for the conditions from Table $5\mathrm{.}1.$ Explain your selection.

b$.$ What is the EER for the model selected at $95$ F outdoor temperature and $80/67$

$d\frac{b}{w}bF.$

c$.$ Determine if the unit will have an SHR less than $0\mathrm{.}75$ when conditions are $85F$

outdoor air temperature and $75\%$ F$/63\%$F dry blub$/$wet bulb indoor air

temperatures.