Yes, it is possible to heat an entire house with radiant heat. Radiant heat is a type of heating system that uses hot water or electric coils to heat the floor or walls of a home. This type of heating system is very efficient and can be used to heat an entire house. Radiant heat is also very comfortable since it heats the objects in the room rather than the air, creating a more even temperature throughout the home. Additionally, radiant heat is often more cost-effective than other types of heating systems.