Air cooling systems have no AL2 SG19 need for [[https://www.repairmywindowsanddoors.co.uk/langford-windowrepair/ SG18]] to take N20 full blast either. RH1 Only little heat SG18 can get into the room so you can N7 set the air conditioner to Www.Repairmywindowsanddoors.Co.Uk low when full-blast UB9 setting when tw8 make use of an sg18 ordinary glass window pane.