The logo is for companies dedicated to installing hydronic heating services.The logo plays with the concentric pattern when installing the heating tubes. 

The blue line around the house icon its meant to represent cold from getting into the house. 
The white area acts as the insulator for the hydronic red tubes in the inside of the logo. 

The logo is minimalist but very elegant and easily distinctive.

The logo is also still available for sale with full license rights here: http://goo.gl/YAnsTk

Otherwise it can be bought as Single here: http://crtv.mk/tXNr