The Northeast Sustainable Energy Association's annual open house is coming up on Saturday, Oct. 4.

Hundreds of buildings will be open across 10 states from 10 a.m. to 4 p.m. A family event will take us out to western Mass. that day, so I'm looking forward to checking out some sites I wouldn't likely have seen otherwise.

Follow this link to a directory of buildings that you can search by zip code, or by green feature (gray-water use, geothermal, grid-tied solar, or whatever).

The event is part of the ASES National Solar Tour.