Water vapor condenses in the shell of a shell and tube heat exchanger containing vertical tubes made of $1$ in OD $14$ BWG copper. The heat exchanger operates at $6$ kPa and the average temperature of the cooling water flowing through the tubes is $80$ oF$.$ The tubes are $9$ ft long and the heat transfer coefficient for the water side is $400$ Btu$/$ft$\mathrm{.}2$h $.$oF$.$ If there are an average of $5$ pipes in a vertical group, calculate the coefficient in a horizontal condenser containing the same number of pipes.