DIY Heat Exchanger ventilation, save on energy

I found this Do It Yourself instruction on the Internet and thought I share it. Why? Heat Recovery Ventilators helps you keep the air varmer and saves on your energy.

So here it is, a nice DIY Heat Exchanger project from Charles Platt:

http://makeprojects.com/Project/Heat+Exchanger/279/1#.UKo0XmfRZ8H

Also featured in Remake America: http://www.make-digital.com/make/vol18/


Värmeväxlar ventilation (in swedish)