In this paper we bring to the fore the supporting role that user-run Internet forums provide for inventive citizen engagement with technology and the particular implications this holds in sustainable energy technologies which is the domain of our analysis.

In this article we clarify how citizen users are able to invent in home heating systems. We researched inventionss that user did to heat pump and wood pellet burning systems. During the years 2005–2012 there were 192 inventions by users in Finland alone.