Energy efficient homes require a tight seal and proper insulation around the envelope of the home, but also need CONTROLLED ventilation and air flow in order to operate at maximum efficiency.
A well presented summary by Matt Risinger of the PROS and CONS for newer construction and energy efficient homes. When a home is built so air tight, properly installed ventilation is crucial to maintain equalized pressure and indoor air quality throughout the home. Quality building products and insulation are also part of the efficiency system to prevent moisture penetration and vapor diffusion. Thanks for sharing Matt.