Energy Efficiency

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Across
  1. 2. Building that needs no heating
  2. 4. Wind-based power
  3. 9. Direction buildings should face
  4. 10. Room buffer zone
  5. 11. Used for solar energy
  6. 13. Home design strategy
  7. 14. Glass that reflects heat
  8. 15. Air sealant for openings
Down
  1. 1. Material that stores heat
  2. 3. Energy label system
  3. 5. Efficient roof layer
  4. 6. Controls light intensity
  5. 7. Shape of efficient homes
  6. 8. Outer layer of a building
  7. 12. Wall insulation material