A non-spring return electric damper actuator (inonziwo "non-spring return" kana "motorized damper actuator") chishandiso chinoshandiswa mumasisitimu eHVAC kudzora chinzvimbo chemvura (airflow-regulating plates) isina yakavakirwa-mukati chitubu mashini. Kusiyana nechirimo chekudzoka actuators, iyo inotsamira pachitubu kuti idzokere kune yakasarudzika chinzvimbo (semuenzaniso, yakavharwa) kana simba rarasika, vasiri-spring return actuators vanobata chinzvimbo chavo chekupedzisira kana simba rachekwa.