How difficult is it to be approved for Argon filling of IGUs and how many companies have achieved so far?
No central database exists for EN1279-3 passes and failures. It is clear that IGUs need to be manufactured to a high standard to retain sufficient gas to maintain performance. The pass rate for dual sealed IGUs seems to be higher than for single seal systems and this is reinforced from wider experience within mainland Europe where adoption of the standard is more widespread and the pass rate is now greater than 80%. Many companies in the UK & Ireland are passing the standard and using this to their advantage by becoming Pilkington energiKare™ Partners.
