■用途

　　冬季隨著環境(jing)溫(wen)(wen)(wen)(wen)(wen)度(du)的降低(di)(di)，中(zhong)央空(kong)調的制熱(re)(re)效率也(ye)隨之降低(di)(di)，當環境(jing)溫(wen)(wen)(wen)(wen)(wen)度(du)與標(biao)(biao)準工(gong)況(kuang)(kuang)溫(wen)(wen)(wen)(wen)(wen)度(du)相差校大(標(biao)(biao)準工(gong)況(kuang)(kuang)室外(wai)溫(wen)(wen)(wen)(wen)(wen)度(du)為7℃)溫(wen)(wen)(wen)(wen)(wen)度(du)低(di)(di)于4℃時，中(zhong)央空(kong)調將不能提供房間(jian)所需(xu)的溫(wen)(wen)(wen)(wen)(wen)度(du)，為了補充不足(zu)的熱(re)(re)量，就需(xu)要在原有供熱(re)(re)設(she)備的基礎上(shang)增加輔(fu)助加熱(re)(re)器。

■優點

　　熱效率高、安(an)全(quan)性(xing)高、結(jie)構合理(li)、防腐性(xing)強(qiang)，使用壽命長等。