In many climates, this orientation requires little supplemental heating. The western side of your house provides the next best location for heat gain. In hot climates, this orientation can cause overheating in the afternoon through the sidewalls. As with any sunroom, the type of frame material has the greatest impact on the appearance. The glass type, or clear plastic, has the greatest effect on the cost to heat it and whether or not air-conditioning is needed.
Wood frames are good natural insulators and allow the greatest flexibility in contours and shapes.
Many woods are used with redwood and mahogany being particularly attractive. PVC frames are nearly maintenance-free. Aluminum exterior frames with wood interiors are a good compromise. As a minimum, select double pane low-e glass walls. Triple-pane glass is available for cold climates.