B4VM - Air Handler - Blower and Evaporator. Trane RunTru evaporator coils are adaptable, can be used with both cooling and heat pump systems, and has a 3 to 3. $934. It comes with a factory-installed. Jul 14, 2022 · The evaporator is a little more tricky to inspect. 1 insulation properties) provides for quiet, efficient operation of the evaporator coil. The indoor evaporator coil is typically either mounted to your furnace and has its own cabinet, or is housed inside a fan coil or air handler unit. Aug 24, 2021 · Step # 1 in determining the size and performance of a coil is dependent upon understanding face & air velocities of air across the coil.