Piggy Back Exchangers include an expansion tank integrated into the design of the heat exchanger itself.  Click on Piggy Back A or B to view stock designs of horizontal heat exchangers with this feature.

Vertical Exchangers provide the same cooling capacity as horizontal, but oriented to fit in engine compartments which do not have sufficient clearance for a horizontal unit.  Click on Vertical to view stock designs.

Low Profile Exchangers incorporate an expansion tank in the shell of the exchanger itself.  This design solves mounting problems where an expansion tank is desired and headroom is limited.  Click on Low Profile to view stock designs.

Compact Type A Exchangers do not incorporate an expansion tank in their design, and instead rely on the overflow reservoir to contain expanded hot coolant during operation, and return it to the system as the engine cools.  Compact exchangers offer the most heat transfer surface for a given set of dimensions.  An external fill neck is required for Type A Compact.  Click on Compact-A to view stock designs.

Compact Type B exchangers are similar to Type A exchangers, but have all water inlet and outlet fittings oriented to accommodate mounting directly on a bulkhead or the deck.  Like the Type A exchangers, a separate fill neck is required.  Click on Compact-B to view stock designs.

Compact Type C exchangers are similar to Type A exchangers, but have an integral fill neck for mountings which place the exchanger at the high point of the coolant loop.  Click on Compact-C to view stock designs.