Energy consumption in the textile industry is a significant part of the production cost. A shell-and-tube heat exchanger (STHX) was designed and manufactured for waste energy recovery from a hot-oil boiler in a textile finishing factory. An STHX with a single pass, including finned tubes and no baffle, was manufactured. By providing waste energy recovery to the applied system, air is released to the environment at 323 K instead of 525 K. Two scenarios were analyzed: (i) the designed STHX, alternatively with finned and unfinned-tube designs; and (ii) a double-pipe heat exchanger (DPHX) under the same operating conditions. These two cases were compared in terms of thermal performance. The applied system achieved an energy recovery of approximately 74.2%. The application of finned-tubes has an effect of between 11% and 24% on the total heat transfer coefficient. Applying the DPHX would provide thermal energy recovery of approximately 13% under the same operating conditions. The reason for the greater waste energy recovery when applying STHX is also shown by this analysis.