Hamwe nuburambe bwimyaka myinshi mubikorwa Umusaruro wateguwe mbere yumuringa wumuringa wumurongo , wa Dabund Umuyoboro urashobora gutanga umurongo mugari wa Pre-Insulated Umuringa Firigo Yumurongo . Wumuringa Wabanje Gukingira Umuringa urashobora guhura nibisabwa byinshi, niba ubikeneye, nyamuneka tubone serivise kumurongo mugihe cyerekeranye n'umurongo wa firigo wateguwe mbere . Usibye urutonde rwibicuruzwa bikurikira, urashobora kandi kwihitiramo umurongo wihariye wa Pre-Insulated Umuringa wa firigo ukurikije ibyo ukeneye byihariye.