Dehumidifiers having improved heat exchange blocks and associated methods of use and manufacture

A heat exchange system, comprising:

• a plurality of elements, having a plurality of airflow channels;
• a plurality of peripheral spacers positioned toward edges of neighboring elements and extending in a first direction;
• a first airflow path extending in the first direction, wherein the first airflow path is at least partially defined by the corresponding elements and the peripheral spacers;
• a second airflow path defined by the airflow channels and extending in a second direction;
• and
• an airflow blocker positioned at a corner portion of the elements to restrict or prevent fluid communication between the first and the second airflow paths at the elements.

A method of making a dehumidifier, comprising:

• positioning a plurality of peripheral spacers, extending in a first direction, toward edges of neighboring elements, the elements having a plurality of airflow channels;
• forming a first airflow path in the first direction, wherein the first airflow path is at least partially defined by the corresponding elements and the peripheral spacers;
• forming a second airflow path extending in a second direction, wherein the second airflow path is at least partially defined by the airflow channels;
• positioning an airflow blocker at a corner portion of one or more of the elements to prevent fluid communication between the first and the second airflow paths at the elements;
• and
• positioning a moisture removing component between the first and second airflow paths.