Heat exchanger apparatus

A heat exchanger apparatus for exchanging heat between first and second air flows, comprising

• a cylindrical-shaped rotary heat exchanger having first and second end surfaces, inner and outer peripheral portions and a longitudinal axis, said heat exchanger including first and second laminated elements alternately distributed in the circumferential direction around said axis;
• separator means positioned at an end surface of said rotary heat exchanger for dividing each of said first and second air flows into first and second portions;
• and
• flow passage means interposed between said separator means and said rotary heat exchanger for diverting the first portion of said first air flow through a first element of said rotary heat exchanger, the second portion of said first air flow through a second element of said heat exchanger, the first portion of said second air flow through a second element of said heat exchanger disposed adjacent the second element through which the second portion of said first air flow passes, and the second portion of said second air flow through a first element of said heat exchanger disposed adjacent the first element through which the first portion of said first air flow passes, said flow passage means merging the first and second portions of said first air flow and the first and second portions of said second air flow after passage through said rotary heat exchanger.