Originally Posted by HeavyAssault
Looking at the HYPERVENT product one would say it's just body heat transfer causing the issue.
Not really. Condensation happens when warm moist air at a temperature above the dew point comes into contact with a surface whose temperature is below the dew point, and stays in contact long enough for the moisture to condense out of the air.
So control of condensation can take many forms:
* Keeping surfaces warmer than the dew point, which is difficult when the surface has cold air on one side and warm air on the other;
* Keeping air circulating so that moisture doesn't have time to condense out of the air onto the cold surface;
* Keeping the air drier by raising the air temperature;
* Keeping the air drier by lowering the moisture content.
But it is true that Hypervent material is designed to only address one cause of condensation, namely the lack of circulation. Whether that will be enough to do the job for you is something only you can tell, and only by trial and error.