1 - Place the Sleeve on a flat surface with logo side up, and determine the opening location.
2 - Insert the Heat Exchanger into the Sleeve with the blue side down (The blue side of the Heat Exchanger should touch the blue side of the Sleeve).
3 - Be sure the Heat Exchanger is flat inside the Sleeve with no folds or creases. Zip up the Sleeve, if applicable. After assembly, lay the blue side up and ensure the Heat Exchanger is uniformly laid out and smooth inside the Sleeve.