The problem with your sealed unit is fourfold:-
To solve this fourfold problem, we need to do just three things:
The most common question we are asked is, will your pressure equalised unit have the same thermal value as a sealed unit? The answer is undoubtedly YES! Because dry still air is a poor conductor of heat, the thermal barrier is created by dry still air in between the two panes of glass. After the repair, when the unit is heated by the sun the moisture will evaporate on a daily basis, until both the desiccants and the unit are completely dry.
The two plugs are then installed and will hold the now dry air between the two panes and so create the thermal barrier.
However, when the unit is placed under pressure by the sun a minute amount of air will pass through the plugs out of the unit, therefore only a minute amount of air will re-enter the unit, the desiccants will grab that moisture so the air in the unit remains both dry and still.
The end result being that the unit maintains a stable thermal value and doesn’t produce condensation.