Air cooling HA8 systems do not want to get into full blast RH10 either. Only little heat can join the NW3 room also set atmosphere conditioner Rh7 SG18 N8 to low when full-blast setting when you use an ordinary glass [[https://www.repairmywindowsanddoors.co.uk/crawleydown-windowrepair/ RH10]] window pane.
RH10
SG5