回复：我家有个也封口，天冷室内暖汽会从那里往外包跑，烧壁炉不会增加多少热能，等于烧钱

来源: 于 2012-01-05 09:59:27 [旧帖] [给我悄悄话] 本文已被阅读：次
you are talking about the old style furnace, the new furnace will heat up your whole house with fan carry the hot air around