The best time to enjoy a sunroom can be the middle of winter. While we always think of sitting in a sun room looking out over a lush garden, the time when we need sun the most is when those plants are well below the snow. Like sitting on a porch in the summer while a warm rain falls out in the yard, sitting in a sun room around a crackling fire while it storms outside can be a wonderful experience.
When planning a sunroom, make sure there is a nice view out the windows in all seasons. Well insulated windows, floors and ceilings can help make up for the large percentage of glass. Radiant floor heat is a wonderful bonus on those chilly winter days. Even if conventional heat keeps it warm inside, there is nothing like walking around in stocking feet on a toasty radiant floor.
James M. Crisp has been an architect for well over 20 years. His architectural firm, Crisp Architects, designs projects throughout New York, Connecticut and Massachusetts. In April of 2007, Taunton Press published 'On the Porch' by James M. Crisp and Sandra Mahoney. 
Fantastic! I can picture myself sitting there with a cup of tea and my dog laying at my feet while watching the snow fall all around me. Very cool!