How It Works
Basically, to get rid of the moisture from the inside of a double-glazed
units or to prevent the unit from fogging the unit needs to be re-engineered,
the transformation from a hermetically sealed unit into a pressure equalised
unit is not that difficult.
We refer to the unit as hermetically sealed (gas tight)
however if you are reading this it is likely that you have moisture in your
units, this means the seal has failed and the unit is no longer air tight, we
call these units "Blown" and most people will simply
replace the unit with another, the replacement solves the problem of moisture
ingress that's for sure however it is only a short-term fix and the problem
will return when the new units seal fails.
Re-engineering the failed unit solves the problem, is cheaper than
replacing the unit, last longer than replacements and what's more is the most
environmentally friendly option (most failed sealed units go straight to
The re-engineered unit has the same thermal performance as a standard air-filled
unit, air will escape from the unit when the temperature rises and air will be
allowed to re-enter the unit when the temperature drops.
The additional three features added to the original unit work
simultaneously to prevent any further damage to the unit, to prevent any
further ingress of water into the vault and finally prevent the moisture in the
air fogging on the glass.
The real question we should be asking
is why do they not make units like this in the first place?