Green Exterior
This will have environmentally friendly exterior designs
Green Roof
Green roofs include anything from basic plants on the roof to an entire garden. This type of roof not only allows you to enjoy an open space, it also is an easy way to manage rainwater. They provide insulation by reducing the heat island effect. They are typically very expensive to install, plus there is the cost of maintaining the plants. I would not personally use this because I am forgetful and the plants would probably all die.
Insulated Doors
The energy efficient doors typically has a foam insulated core with an exterior of steel. They can use more than one pane of fiber glass with insulating plastic between the panes. They also usually have weatherstripping, which is a strip along the bottom that keeps drafts out. Steel doors are typically the less expensive of the doors. I would use the fiberglass doors because they look like wooden doors and require less maintenance.
Storm Windows
Storm windows prevents air leakage. When properly installed they can reduce heating, cooling, and light bills. Depending on the direction the window is facing, the most energy efficient window will change due to the difference on the sun's rays. They can be expensive to install but usually save you money in the long run. I would use this.
Works Cited
"Doors." Doors. Office of Energy Efficiency & Renewable Energy, n.d. Web. 29 Jan. 2016.
"Energy-Efficient Windows." Energy-Efficient Windows. Office of Energy Efficiency & Renewable Energy, n.d. Web. 29 Jan. 2016.
"Fiberglass, Steel and Wood Comparison." Wood Doors vs. Steel Doors vs. Fiberglass Doors. Therma-Tru Corp., n.d. Web. 29 Jan. 2016.
"Tips: Energy-Efficient Roofs." Energy.gov. Office of Energy Efficiency & Renewable Energy, n.d. Web. 29 Jan. 2016.