Solar air heaters are passive solar element that can heat rooms during cold days while the sun is shining. Building one is a piece of cake
Energy autonomy can provide greater independence and security, as it reduces reliance on external sources of energy that may be vulnerable to disruptions or price fluctuations. However, achieving complete energy autonomy can be challenging and may not be practical or cost-effective in all cases.
It is even not necessary or realistic for every individual to achieve complete energy autonomy. In most cases, it is more efficient and cost-effective for individuals to be part of a larger energy system, such as a grid or community-level renewable energy system. This allows for the sharing of resources and the balancing of supply and demand.
Since I got dropped into biogas, working with Prof. TH Culhane on different biogas projects, I always wanted to have a biogas system on my own. When I came to Finland I finally got the space to build a biogas digester and then actually experiment… more