Airiest

13 clues
Most open
Most light
Most lively
Most jaunty
Most breezy
Most ethereal
Best ventilated
Most ventilated
Most lighthearted
Least substantial
Most light-hearted
Most spacious and open
With the most open windows
Similar answers:
Aafair
Abridgetoofair
Abusinessaffair
Achair
Achiest
Aclrepair
Adair
Adairs
Adammayfair
Adeleastaire
Adirondackchair
Adlaiestevenson
Aeriest
Afair
Afamilyaffair
Affair
Affaire
Affairedecur
Affairedhonneur
Affairs