Answer: sunroom

AnswerCrossword Clue
SUNROOMWindowed chamber
SUNROOMSolarium
SUNROOMSolarium.
SUNROOMBright spot in architecture?
SUNROOMConservatory's cousin
SUNROOMEnclosed porch, perhaps
sunrooma room built to admit much sunlight
sunroomA room with large windows and sometimes a glass roof, designed to allow in a lot of sunlight