The tubes constantly get condensation in them
Closed loop with FAST air exchange--5 times an hour is crazy fast compared to typical house tubes
Perferated pipe backfilled with rock and controlled vapor barrier floor
Venting – The top windows are designed to vent the hot air on hot sunny days with automatic window openers. Humidity levels are kept low to prevent plant disease.
We still believe that the air exchange rate should be 5 times to insure the plants healthy, but we have not tested it yet.
What sort of system are you using to store your urine, and for how long?