Lecture_7.1__Energy_Code - AE202 Lecture 7.1 Energy Code...

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AE202 Name______________________ Lecture 7.1 Energy Code Date_______________________ Reference: MEEB 10th edition Section 7.9, Appendix G. International Energy Code Energy Code o Prescriptive o Performance Developments o ASHRAE 90 – 1975 o ASHRAE 90A – 1980 o ASHRAE/IES 90.1 – 1989 o Energy policy act 1992 Energy Code Residential (compliance in heating mode only) 1. Walls u o - overall u-value u o code < u o design o Tougher on single family homes o New construction only 25% renovation, must comply 2. Roof u o code < u o design o glass glass wall wall o A ) A (u ) A (u u design + =
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u o code < u o design Cooling – OTTV (Commercial Buildings) - Overall thermal transfer value OTTV code OTTV design 0 gl gl gl w w w design A SF SC A Δ T A U TD A u OTTV + + =
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International Energy Code Chapter 6: Simplified Prescriptive Approach o Residences Detached one or two-family Group R-2 or R-4 Townhouses o Window Area < 15% for detached homes < 25% for Town homes o Building Envelop enclosing conditioned spaces only Building Envelope Mechanical System (Section 502)
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