Heating, ventilation, and air conditioning (HVAC) systems often involve extensive ductwork and components passing through roof and ceiling spaces, which are often fire-rated. This service specifically addresses how to maintain the fire integrity of these critical barriers where HVAC elements penetrate them. It includes the installation of fire dampers within ductwork where it crosses fire-rated boundaries, applying fire-rated wraps or insulation to ducts, and precisely firestopping all gaps around the ducts and other HVAC components where they pass through fire-rated ceilings or roof structures. This prevents fire and smoke from traveling through the HVAC system to other compartments or floors.