1. Kugwiritsa ntchito R134a
2. Kapangidwe kakang'ono kakang'ono komanso kopepuka, chifukwa popanda chipangizo chofananira
3. Phokoso lochepa, Kuchita bwino kwambiri ndi kuzizira kwakukulu komanso kugwiritsa ntchito mphamvu zochepa
4. Copper Aluminium bundy chubu
5. Ndi kuyamba kuyambitsa capacitor
6. Kugwira ntchito mokhazikika, kosavuta kusamalira komanso moyo wautali wautumiki womwe umapangidwira kufikira zaka 15