Home upgrades like insulation, ducted heat pumps, or air sealing can save energy and improve comfort, but hidden risks may compromise your family’s health if not tested properly. When you seal a house tight to keep utility bills low, you alter how air, moisture, & combustion gases move through the living space. Without a systematic approach to health & safety testing, those well-intentioned efficiency projects can accidentally trap pollutants indoors, create backdrafting hazards, or foster mold growth.