The Cedar Rapids Downtown Library is LEED Platinum certified.
The library has windows all around the building and a large skylight. The lights have sensors and will remain off when there is enough light coming through the windows.
The green roof was not so green when we visited but you could see where the plants grow in the summer.
Also on the roof are two large retention tanks to gather rain water to return to the aquifer.
The building uses a ground source heat pump system. We were able to see the mechanicals that make the system work.