Ordinance Text

7-4-5: AMENDMENTS:

IECC section 201.3 is amended to read as follows:

201.3 Terms Defined In Other Codes. Where terms are not defined in this code and are defined in the currently adopted editions in the international building code, national electrical code, international fire code, international fuel gas code, international mechanical code or the 2009 Idaho state plumbing code, such terms shall have meanings ascribed to them as in those codes.

Table 402.1.1 Insulation And Fenestration Requirements By Component is amended as follows:

a. Delete the values contained in table R402.1.1 (table N1102.1.1) for climate zone "5 and marine 4" and climate zone "6" and replace with the following:

TABLE R402.1.1

INSULATION AND FENESTRATION REQUIREMENTS BY COMPONENT

Climate Zone	Fenestrati on U-Factor	Skylight U-Factor	Glazed Fenestrati on SHGC	Ceiling R-Value	Wood Framed Wall R-Value	Mass Wall R-Value	Floor R-Value	Basement Wall R-Value	Slab R-Value	Crawlspa ce Wall R-Value
5 and marine 4	0.35	0.60	NR	38	20 or 13+5h	13/17	30g	10/13	10, 2 ft	10/13
6	0.35	0.60	NR	49	20 or 13+5h	15/19	30g	15/19	10, 4 ft	10/13

b. Add the following footnote to the title of table 402.1.1 Insulation And Fenestration Requirements By Component:

k. For residential log home building thermal envelope construction requirements see section 402.6.

Table R402.1.3 delete the values contained in table 402.1.3 (table N1102.1.3) for climate zone "5 and marine 4" and climate zone "6" and replace with the following:

TABLE R402.1.3

EQUIVALENT U-FACTORS

Climate Zone	Fenestration U-Factor	Skylight U-Factor	Ceiling R-Value	Wood Framed Wall R-Value	Mass Wall R-Value	Floor R-Value	Basement Wall R-Value	Crawl-space Wall R-Value
5 and marine 4	0.35	0.60	0.030	0.057	0.082	0.033	0.059	0.065
6	0.35	0.60	0.026	0.057	0.060	0.033	0.050	0.065

Table R402.2.6 delete table R402.2.6 and replace with the following:

TABLE R402.2.6

STEEL-FRAME CEILING, WALL AND FLOOR INSULATION

(R-VALUE)

Wood Frame R-Value Requirement	Cold-Formed Steel Equivalent R-Valuea
Steel Truss Ceilings
R-30	R-38 or R-30 + 3 or R-26 = 5
R-38	R-49 or R-38 + 3
R-49	R-38 + 5
Steel Joist Ceilings
R-30	R-38 in 2 x 4 or 2 x 6 or 2 x 8 R-49 in any framing
R-38	R-49 in 2 x 4 or 2 x 6 or 2 x 8 or 2 x 10
Steel Framed Wall
R-13	R-13 + 5 or R-15 + 4 or R-21 + 3 or R-0 + 10
R-19	R-13 + 9 or R-19 + 8 or R-25 + 7
R-21	R-13 + 10 or R-19 + 9 or R-25 + 8
Steel Joist Floor
R-13	R-19 in 2 x 6
R-13	R-19 + 6 in 2 x 8 or 2 x 10
R-19	R-19 + 6 in 2 x 6
R-19	R-19 + 12 in 2 x 8 or 2 x 10

a. Cavity insulation R-value is listed first, followed by continuous insulation R-value.

b. Insulation exceeding the height of the framing shall cover the framing.

Section 402.4.3 Fireplaces shall be deleted and replaced with the following:

402.4.3 Fireplaces. New wood-burning fireplaces shall have tight-fitting flue dampers and outdoor combustion air.

Section 402.6 Residential Log Home Thermal Envelope shall be an added section as follows:

402.6 Residential Log Home Thermal Envelope. Residential log home construction shall comply with sections 401 (General), 402.4 (Air Leakage), 402.5 (Maximum Fenestration U-Factor and SHGC), 403.1 (Controls), 403.2.2 (Sealing), 403.2.3 (Building Cavities), sections 403.3 through 403.9 (referred to as the mandatory provisions), section 404 (Electrical Power and Lighting Systems), and either subparagraph 004.04.b.i, ii, or iii, as follows:

i. Sections 402.2 through 402.3, 403.2.1, 404.1 and table 402.6;

ii. Section 405 Simulated Performance Alternative (Performance); or

iii. REScheck (U.S. department of energy building codes program).

Table 402.6 Log Home Prescriptive Thermal Envelope By Component is an added table as follows:

Climate Zone	Fenestrati on U-Factora	Skylight U-Factor	Glazed Fenestrati on SHGC	Ceiling R-Value	Min Average Log Size In Inches	Floor Value	Basement Wall R-Valued	Slab R-Value & Depthb	Crawlspace Wall R-Valued
5,6 - High efficiency equipment pathc	0.32	0.60	NR	49	5	30	15/19	10, 4 ft.	10/13
5	0.32	0.60	NR	49	8	30	10/13	10, 2 ft.	10/13
6	0.30	0.60	NR	49	8	30	15/19	10, 4 ft.	10/13

a. The fenestration U-factor column excludes skylights. The SHGC column applies to all glazed fenestration.

b. R-5 shall be added to the required slab edge R-values for heated slabs.

c. 90% AFUE natural gas or propane. 84% AFUE oil, or 15 SEER heat pump heating equipment (zonal electric resistance heating equipment such as electric resistance heating equipment as the sole source for heating is considered compliant with the high efficiency equipment path).

d. "15/19" means R-15 continuous insulated sheathing on the interior or exterior of the home or R-19 cavity insulation at the interior of the basement wall. "15/19" shall be permitted to be met with R-13 cavity insulation on the interior of the basement wall plus R-5 continuous insulated sheathing on the interior or exterior of the home. "10/13" means R-10 continuous insulated sheathing on the interior or exterior of the home or R-13 cavity insulation at the interior of the basement wall.

(Ord. 728, 1-27-2015)

Source: American Legal Publishing — codelibrary.amlegal.com — public domain Official Source ↗

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0-0-0-9317

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boisestandard.org

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Eagle, Idaho — United States

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Eagle

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Ada County

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American Legal Publishing

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CHAPTER 4 ENERGY CONSERVATION CODE 7-4-1: PURPOSE:7-4-2: CODE ADOPTED:7-4-3: FEES:7-4-4: VIOLATIONS:7-4-5: AMENDMENTS:CHAPTER 5 MANUFACTURED HOMES 7-5-1: PURPOSE:7-5-2: DEFINITIONS:7-5-3: DEVELOPMENT STANDARDS:7-5-4: ACCESSORY STRUCTURES:7-5-5: ADMINISTRATION AND ENFORCEMENT:7-5-6: NONCONFORMING MANUFACTURED HOMES:CHAPTER 6 DEVELOPMENT IMPACT FEE 7-6-1: TITLE AND PURPOSE:

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