Isigaba sesi-3 – Iqondwa kanjani incazelo ye-“double insulation”
double insulation: isistimu yokuhlukanisa ehlanganisa kokubili ukufakwa okuyisisekelo kanye nokufakwa okungeziwe Incazelo iwukwenza lula kuphela incazelo yokugquma okuyisisekelo kanye nokwahlukanisa okungeziwe ezingeni, kusetshenziswa igama elilodwa ukuchaza amagama amabili. Njengoba kukhonjisiwe emfanekisweni ongezansi, intambo yokunikezela inezingqimba ezimbili zokuvala, umgodla wocingo ongaphakathi kanye nomgodla wocingo omnyama ongaphandle, ochazwa ngokuthi ukufakwa kabili. Njengoba kukhonjisiwe ezithombeni ezimbili ezilandelayo(ifeni), umgodla…