■用途

　　冬季隨著(zhu)環(huan)境溫(wen)(wen)(wen)(wen)度(du)的降低，中(zhong)央(yang)空調(diao)的制熱(re)效率也隨之降低，當(dang)環(huan)境溫(wen)(wen)(wen)(wen)度(du)與標準工(gong)況溫(wen)(wen)(wen)(wen)度(du)相差校大(標準工(gong)況室(shi)外溫(wen)(wen)(wen)(wen)度(du)為(wei)(wei)7℃)溫(wen)(wen)(wen)(wen)度(du)低于4℃時(shi)，中(zhong)央(yang)空調(diao)將(jiang)不能提供(gong)(gong)房間(jian)所需的溫(wen)(wen)(wen)(wen)度(du)，為(wei)(wei)了補充不足的熱(re)量，就(jiu)需要在原有供(gong)(gong)熱(re)設備的基礎上增加輔助加熱(re)器。

■優點

　　熱效(xiao)率高、安(an)全性高、結構合理、防腐性強，使用壽命(ming)長等。