Physics, 12.11.2019 00:31, MZ2017

Jing has 1200 ft2 of roof in his home in pittsburgh, pa (hdd = 6,000). he is considering upgrading the insulation from r-16 to r-22. the estimate from the contractor was $554. his home is heated with natural gas. last year, the average price he paid for natural gas was $14.6/mcf. assuming an afue of 84.1%, how long will it take jing to recover his investment?

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Jing has 1200 ft2 of roof in his home in pittsburgh, pa (hdd = 6,000). he is considering upgrading t...