Frank Monnerjahn

Frank Monnerjahn

Frank Monnerjahn
More ideas from Frank
DIY ventilation heat exchanger - EcoRenovator

Homemade heat exchanger constructed from plywood, a fan, and a pair of recuperators.

DIY HVR rig for exchanging fresh air in your uber-effienct cabin. Building one now.

DIY HVR rig for exchanging fresh air in your uber-effienct cabin.