Length of cutout (16-1/2") is equal to the length of this sheet. TEMPLATE 13-1/8 16-1/2 STEP-BY-STEP INSTALLATION INSTRUCTIONSIMPORTANT: .................. Placement Information Mount the Model HUM-FP Fan-Powered Flow-Thru ....................................WARM AIR PLENUM ONLY. .................................................. shown in relation to the AC cooling coils. 7. Stand the evapo- rator pad upright with the black index mark on top. Make sure the wick is seated securely in the drip tra