Qalabka korantada ee aan gu'ga soo laabanayn (sidoo kale loo yaqaan "soo laabashada guga" ama "matoorada damper actuator") waa qalab loo isticmaalo nidaamyada HVAC si loo xakameeyo booska dampers (taarikada hawo socodka hawada) iyada oo aan lahayn hab dhismeed guga. Si ka duwan jilayaasha soo celinta guga, kuwaas oo ku tiirsan guga si ay ugu noqdaan booska caadiga ah (tusaale, xiran) marka korontadu lumiso, kuwa aan gu'ga ahayn soo celinta waxay hayaan booskooda ugu dambeeya marka korontadu go'do.