I-actuator ye-damper kagesi engeyona intwasahlobo yokubuya (ebizwa nangokuthi "i-non-spring return" noma "i-motorized damper actuator") iyithuluzi elisetshenziswa ezinhlelweni ze-HVAC ukulawula indawo yama-damper (amapuleti alawula ukuhamba komoya) ngaphandle kwendlela yentwasahlobo eyakhelwe ngaphakathi. Ngokungafani nama-actuator e-spring return, athembele esiphethwini ukuthi abuyele esimweni esizenzakalelayo (isb., avaliwe) lapho ugesi ulahleka, ama-actuator e-non-spring return agcina isikhundla sawo sokugcina lapho ugesi unqunywa.