David Richardson

“the typical HVAC system delivered only 57% of the equipment’s laboratory-rated capacity into the home. Because of installation defects, roughly 43% of the heating and cooling the equipment was suppos…”

“The average pressure in an HVAC system runs 164% higher than the HVAC equipment manufacturers require.”

“average airflow measures only 75% of manufacturer requirements.”

“some return duct systems pull more than 50% of their air from attics reaching temperatures between 130°F and 140°F.”