The ornamental design for a condenser for heatexchanger, as shown and described.
1. Condenser for heat exchanger
The broken lines depict portions of the Condenser for heat exchanger that form no part of the claimed design; reproduction 1.1 is a front perspective view of the Condenser for heat exchanger; reproduction 1.2 is a front view thereof; reproduction 1.3 is a back view thereof; reproduction 1.4 is a left view thereof; reproduction 1.5 is a right view thereof; reproduction 1.6 is a top view thereof where the bottom view is a mirror image.