mr_hypno
Member
- Joined
- Aug 23, 2017
- Messages
- 40
Has anyone built a DIY solar air furnace/heater before? I was quite intrigued by this. It looks very simple to make and can be very efficient. Most people use just regular black spray paint and it works good. I was thinking this Black 2.0 paint, which is one of the blackest and most light absorbing paint you can get.