Etc.

Rocket Mass Heater Workshop

When: Fri., Aug. 1, 9 a.m.-6 p.m., Sat., Aug. 2, 9 a.m.-6 p.m. and Sun., Aug. 3, 9 a.m.-6 p.m. 2014

A 3-day, hands-on workshop to learn how to build a rocket mass heater and rocket bathtub. Though they can be built into any structure, this construction will be in a cordwood masonry house. Aug. 1-3.

Price: $285