ORD 2020-010 2018-2020 - Laserfiche WebLink

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1. Those with a peak design rate of energy usage less than 3.4 Btu/h • ft2 (10.7 W/m2) or 1.0 watt/ft2 (10.7 W/m2) of floor area for space- conditioning purposes. 2. [Those that do not contain conditioned space.] Unconditioned space that does not contain habitable space. 3. Unconditioned dwellings with enclosed habitable areas less than 1,100 square feet." 4. Dwellings with permitted,off-grid, self supplying photovoltaic with battery back up." (32) TABLE R402.1.2 of the International Energy Conservation Code is deleted in its entirety and replaced with the following: "TABLE R402.1.2 INSULATION AND FENESTRATION REQUIREMENTS BY COMPONENTS WOOD CRAWL CLIMATE FENESTRATION SKYLIGHT GLAZED CEILING FRAME MASS FLOOR BASEMENT SLAB SPACE ZONE U-FACTOR' U-FACTOR FENESTRATION R-VALUE WALL WALL R-VALUE WALL R- WALL SHGC b•c,g R-VALUE d R-VALUE R-VALUE VALUE R-VALUE e f &DEPTH 1 NR 0.75 0.25 30 13 3/4 0 0 0 0 For SI: 1 foot=304.8 mm a. R-values are minimums. U-factors and SHGC are maximums.When insulation is installed in a cavity which is less than the label or design thickness of the insulation,the installed R-value of the insulation shall not be less than the R-value specified in the table. b. The fenestration U-factor column excludes skylights.The SHGC column applies to all glazed fenestration.Exception:Skylights may be excluded from glazed fenestration SHGC requirements in climate zones 1 through 3 where the SHGC for such skylights does not exceed 0.30. c. Exception:If fenestration have overhangs with projection factors,the maximum solar heat gain coefficient shall be as specified in Table R401.2.1. d. R402.1.2 and R402.2 allow use of R407. e. The second R-value applies when more than half the insulation is on the interior of the mass wall. f. Exception:R-value for mass walls are not required if:mass walls have a covering with reflectance of>0.64;mass walls have overhangs with a projection factor equal to or greater than 0.3.CMU or similar mass walls are 6 inches or greater in thickness. g. Exception:Jalousie windows are exempt from SHGC requirements." (33) Subsection R402.1.2 of the International Energy Conservation Code is amended to read as follows: "R402.1.2 Insulation and fenestration criteria (Prescriptive). The building thermal envelope shall meet the requirements of Table R402.1.2, [based on the climate zone specified in Chapter 3.] Exception: Insulation values of above-grade walls and ceilings shall be permitted to comply with Section R407." 18