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枫下家园 / 美丽家居 / 今天一个公司的sales上门。据他说,如果旧furnace是9万BTU, 效率60%;是不是95%的新furnace只要6万BTU就可以了。不知最近换过furnace的大侠如何考虑这个问题?
-bigjoe(万里独行);
2010-1-14
(#5805925@0)
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I think the concept is wrong, BTU is the how much heat your house need and the efficiency is the factor for the furnace, higher efficiency means more gas your furnace can save.
-bluesky2000(bluesky2000);
2010-1-15
(#5807435@0)
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你的意思,所谓furnace 的BTU指标,是指它的输出heat的能力?
-bigjoe(万里独行);
2010-1-15
(#5809306@0)
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Just came back from another heating company. They confirmed the BTU in specification is the input and the actual heat shall be less. For example, 80k BTU, 65% efficiency, heat output to house is 80k * 65%.
-bigjoe(万里独行);
2010-1-16
(#5810321@0)
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For example your house whatever furnace old or new, efficiency hign or low should provide 90000 BTU outlet. Suppose it costs 1000 sq m natural gas for the old furnace, 600 sq m only for new.
-bluesky2000(bluesky2000);
2010-1-15
(#5807455@0)