Cooling below dewpoint is generally not a good idea.
I know this is OT for this thread, but I wanted to ask...
I have a stack of Avalons that lives on my outdoor deck. A roof protects them from rain and such, but they are fully exposed to the outdoor temperature changes, which get down below freezing at night this time of year.
Am I likely to have dew issues?
Maybe. Winter is probably less of an issue. The relatively humidity is lower (cold, dry air) so there isn't as much water to condense out. If you get condensation (more likely in Spring) it will be because the roof is colder than the dew point and water condenses out of the air and drips onto the rigs. If the heat from your rigs keeps the underside of the roof higher than the dewpoint then there isn't much risk.
If you can change the setup from a roof with open walls to an enclosed box that keeps the temp of the air inside the box above the dew point the chance goes to zero.