換熱(re)紙在全熱(re)空氣(qi)(qi)換熱(re)器紙芯結構中主(zhu)要起換熱(re)、傳濕作用，其主(zhu)要性(xing)能包括傳熱(re)性(xing)能、透(tou)濕性(xing)能、透(tou)氣(qi)(qi)性(xing)能。

全熱(re)(re)交換器是一種節(jie)(jie)能的(de)(de)熱(re)(re)回收裝(zhuang)置，通(tong)過回收排(pai)氣中(zhong)的(de)(de)余熱(re)(re)對引入(ru)空(kong)(kong)(kong)(kong)調(diao)系統的(de)(de)新風(feng)進行預熱(re)(re)或(huo)預冷，在新風(feng)進入(ru)室內或(huo)空(kong)(kong)(kong)(kong)調(diao)機組的(de)(de)表冷器進行熱(re)(re)濕處理之前(qian)，降低(增加)新風(feng)焓(han)值。有(you)(you)效降低空(kong)(kong)(kong)(kong)調(diao)系統負荷(he)，節(jie)(jie)省空(kong)(kong)(kong)(kong)調(diao)系統能耗(hao)和運行費用(yong)，有(you)(you)效地解決了提高室內空(kong)(kong)(kong)(kong)氣品(pin)質與(yu)空(kong)(kong)(kong)(kong)調(diao)節(jie)(jie)能之間(jian)的(de)(de)矛盾，在空(kong)(kong)(kong)(kong)調(diao)系統節(jie)(jie)能領域中(zhong)具有(you)(you)不可替代(dai)的(de)(de)作用(yong)。