Heat pipes have been used successfully in a variety of HVAC design applications over the past 15 years for passive dehumidification - ranging from 2 ton residential units to 230 ton commercial applications.

Free precool and reheat
No heat added to conditioned space
Allows entire system to work more efficiently
Increases latent capacity without additional energy consumption
Dehumidifies air entering the ductwork. Helps better meet the ASHRAE 62-1999 Standard.
No moving parts to break down or wear out
Often allows downsizing of entire HVAC systems
Helps prevent IAQ problems associated with high humidity