Tee,
I've always thought of a conservatory, solarium, greenhouse, sunroom as all the same thing except most greenhouses doesn't usually have a place for furniture. I want one like Cinta is planning.
My youngest sister lived in north Georgia for many years where they built a house with a beautiful "Sunroom" (as she called it.) She wasn't really into houseplants and only had a couple but she always told me that she knew that if I had a room like that, it would be full of plants. We do have a screened porch here with ceiling fans but her sunroom was so nice; french doors led from the family room as well as the breakfast room into the sunroom. I could only find a photo showing part of the room ...