1. solar & electric water heaters, 2. electrical installation standard hd 60364, 3. electrical shock protection equipment, 4. electrical lightning protection equipment, 5. alarm, 6. cameras only outside the house, 7. barbeque - grill, 8. wood-built oven, 9. cooling - heating with heat pump (split type a/c), 10. internet infrastructure, 11. terrestrial & satellite channels (antennas), 12. the ground floor only has an extra energy fireplace, 13. common courtyard area with lighting, 14. common ground floor storage, 15. common absorbing septum, 16. fire extinguisher inside and outside the house.