3 ms·

-40% for the duct heat loss

• rootusrootus 4y ago
  That seems kind of high for insulated ducts, where does that number com from?
  • fifteenforty 4y ago
    US energy.gov
    • dahfizz 4y ago
      It would be nice to actually link the source[1] (PDF). The stat is that you lose between 25-40% efficiency for "typical" existing installations. The document goes on to explain that an insulated duct which doesn't leak doesn't have this kind of efficiency loss. [1] https://www.google.com/url?q=https://www1.eere.energy.gov/buildings/publications/pdfs/building_america/27630.pdf&sa=U&ved=2ahUKEwjywOimrc38AhUxg4kEHbS6CQMQFnoECAkQAg&usg=AOvVaw1Q4Xl6rK5YSR2O73XYDfw3 https://www.google.com/url?q=https://www1.eere.energy.gov/bu...