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It’s not solar control (reflective) glass. It lets the heat in but also reflects the heat back into the room but cuts UV out to stop stuff fading/yellowing.something to do with long waves coming through and short waves bounced back.
We are not fully south facing so in the summer the sunset is further round so at some point in the afternoon so will be spared overheating in the summer plus we have a shaded side and get good airflow through.
Foil backed thermal blinds also help keep heat in/out.
It’s Pilkington K glass.
Figured that if it’s unbearable in the lounge with a 40° summer the savings over the rest off the year will pay for a portable aircon unit.
Mr_Smyth
Ooh I didn't know you'd got that. Am I right in thinking that your solar gain is reduced in the first place by the low-E glass? I.e. it works both ways right?
I'm interested in it anyway for the usual reasons, but the front of our house faces west and the sun is crazy in summer. It heats up our first floor front room something crazy then this heat rises into our loft bedroom, so I was thinking that low-E glass might help reduce that a bit (as part of a bigger package of stuff).