The THERMO CUBES are handy to plug into any 120VAC Receptacle and then plug an electric heater into the THERMO CUBE. These will turn ON and OFF at different temperature models...
This is what I do when parking my OFF-ROAD POPUP at home... This would be handy for the brick house as well... keeps things from freezing up inside my POPUP trailer...
I use the ON at 35degrees OFF at 45 degrees model TC-3...
Available from AMAZON...
Roy Ken