Abstract: Heat exchanger which is a draw-through, self-contained, central ducted system. Heat exchanger can be used with a furnace or installed separately in any system. Supply and exhaust direct-drive blowers provide air flow against high resistance laminar, straight-thru/non-turbulent air flow of true cross-flow sized elements providing separation of air flow for side-by-side air flow with counter-flow heat transfer. The system is heavy duty, aluminum, cross flow, double-pass heat exchanger. The system includes drain pans and front and back access panels which provides easy access to the heat exchanger for cleaning as required. The electrical parts are on a slide out tray for easy servicing. The heat exchanger can be used in residential, commercial, or industrial environments.