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HVAC ductwork symbols

HVAC ductwork symbols
HVAC ductwork symbols, vertical duct, variable bend, duct, transitioning, reducing, duct, supply, duct, supply duct-section, straight duct, sliding damper, return, duct, offset, transitioning, reducing, duct, miter bend, duct, manual volume damper, louver opening, junction, duct, flexible, connection, fire damper with access door, fan and motor with belt guard, exhaust, return or outside air duct-section, damper, branch duct, beveled junction, duct, automatic volume damper, Y junction, duct, VAV box, variable air volume box, 3 way junction, three way junction, duct,