回复：包括 furnace 吗?

来源: 于 2014-05-16 11:10:35 [旧帖] [给我悄悄话] 本文已被阅读：次

It depends.  Gas?  mayne not.  Oil? maybe if it already show some signs of aging.   
However, the key is fully understanding JY101's article.  It is very important.  There are also tricks/strategies in asking for quotes.