2) cooled by a cooling system whose sensible output capacity is greater than or equal to 5 Btu/h ft².1) heated by a heating system whose output capacity is greater than or equal to 3.4 Btu/h ft².The provisions of this standard apply to the envelopes of buildings, provided that the enclosed spaces are: This standard provides (a) minimum energy-efficient requirements for the design and construction of 1) new buildings and their systems, 2) new portions of buildings and their systems, and 3) new systems and equipment in existing buildings and (b) criteria for determining compliance with these requirements. The purpose of this standard is to provide minimum requirements for the energy-efficient design of buildings except low-rise residential buildings. This 2007 edition of the standard has several new features and includes changes resulting from the continuous maintenance proposals from the public, including all of the Addenda to Standard 90.1-2004. Previous versions of this document, errata, and a supplement containing addenda a, b, c, g, h, i, j, k, l, m, n, p, q, s, t, u, w, y, ad, and aw, are available under the Product Family tab.
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