Why are duct and piping penetrations important to seal during air sealing?

Why are duct and piping penetrations important to seal during air sealing?

• A. They create pathways for air leakage that bypass insulation
• B. They improve structural integrity
• C. They have no impact on energy efficiency
• D. They only affect acoustics

Answer: (C)

Sealing duct and piping penetrations is important because those gaps act as direct pathways for conditioned air to leak in or out, bypassing the insulation and the air barrier. When these openings aren’t sealed, you lose energy through leakage, which drives up heating and cooling loads and undermines overall energy efficiency. That’s why the best choice is that they create pathways for air leakage that bypass insulation. The idea that sealing would improve structural integrity isn’t the main effect—openings don’t typically strengthen the structure. Saying there’s no impact on energy efficiency isn’t accurate, since air leaks through these penetrations are a major source of energy waste. And while sealing can influence acoustics to some extent, the primary reason for sealing is to reduce energy loss and improve efficiency.

Sealing duct and piping penetrations is important because those gaps act as direct pathways for conditioned air to leak in or out, bypassing the insulation and the air barrier. When these openings aren’t sealed, you lose energy through leakage, which drives up heating and cooling loads and undermines overall energy efficiency. That’s why the best choice is that they create pathways for air leakage that bypass insulation. The idea that sealing would improve structural integrity isn’t the main effect—openings don’t typically strengthen the structure. Saying there’s no impact on energy efficiency isn’t accurate, since air leaks through these penetrations are a major source of energy waste. And while sealing can influence acoustics to some extent, the primary reason for sealing is to reduce energy loss and improve efficiency.