When referring to energy efficient homes and buildings, Space heating is where heat is gathered from internal sources, like the cooking stove, or any other major appliances, including electrical devices. Passivhaus buildings are so efficient; they can draw upon the body heat generated by humans and animals inside the building. Devon architects utilising the passivhaus approach to design and architecture won’t even need to use traditional central heating due to the help of a good ventilation system, and Passivhaus buildings in Europe aren’t likely to need a supplementary heat source as long as the heating load is kept under a certain value. At Regeneration Partnership they are standing by the passivhaus approach to environmental architectural design and specialise in conservation refurbishment. Their buildings subsequently encourage healthy living and have next to no environmental impact.