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ENERGY CONSERVATION CODE

Boise City Code tit. 9, ch. 9
in effect

Boise City Code § 9-9-1 PURPOSE

9-9-1: PURPOSE: The purpose of this Chapter is to establish minimum regulations for energy-efficient buildings using prescriptive, performance-based, or energy rating index compliance alternative provisions. The provisions of this code shall regulate the design and construction of building envelopes for adequate thermal resistance and low air leakage, including the design and selection of mechanical systems, service water-heating systems, pools and spas, electrical equipment, power, and lighting systems in order to enhance the efficient use and conservation of energy in new and existing building construction. (Ord. 43-17, 12-19-2017, eff. 1-1-2018; amd. Ord. 42-20, 12-1-2020, eff. 1-1-2021)

Boise City Code § 9-9-2 CODE ADOPTED

9-9-2: CODE ADOPTED: All the rules, regulations, and ordinances relating and applying to the design, construction, quality of materials, erection, installation, alteration, repair, location, relocation, replacement, addition to, use or maintenance of the building envelope, building mechanical systems, service water-heating systems, pools and spas, electrical equipment, power, and lighting systems, established by the 2018 edition of the International Energy Conservation Code (IECC), published under the authority of the International Code Council, Inc., is hereby adopted as the Energy Conservation Code of Boise City as amended, and except to the extent that those said rules and regulations are hereby changed, altered, or amended by this code. One copy of the 2018 edition of the International Energy Conservation Code shall be filed for use and examination by the public in the Office of the City Clerk. All provisions in this Chapter shall be effective January 1, 2021. (Ord. 43-17, 12-19-2017, eff. 1-1-2018; amd. Ord. 42-20, 12-1-2020, eff. 1-1-2021)

Boise City Code § 9-9-3 IECC ENERGY CODE AMENDMENT, SECTION C101.1, TITLE

9-9-3: IECC ENERGY CODE AMENDMENT, SECTION C101.1, TITLE: C101.1 Title. Boise City Code Title 9, Chapter 9 shall be known as the Energy Conservation Code of Boise City, and hereinafter may be cited or referred to as "this Chapter" and "this code." (Ord. 43-17, 12-19-2017, eff. 1-1-2018; amd. Ord. 42-20, 12-1-2020, eff. 1-1-2021)

Boise City Code § 9-9-4 IECC ENERGY CODE AMENDMENT, ADD SECTION C101.5.2, INDUSTRIAL, ELECTRONIC, AND MANUFACTURING EQUIPMENT

9-9-4: IECC ENERGY CODE AMENDMENT, ADD SECTION C101.5.2, INDUSTRIAL, ELECTRONIC, AND MANUFACTURING EQUIPMENT: C101.5.2 Industrial, electronic and manufacturing equipment. Buildings or portions thereof that are heated or cooled exclusively to maintain a required operating temperature for industrial, electronic, or manufacturing equipment shall be exempt from the provisions of this code. Such buildings or portions thereof shall be separated from connected conditioned space by building thermal envelope assemblies that comply with this code. If this condition or use is abandoned, then that building or portion thereof shall be subject to the requirements of this code. (Ord. 43-17, 12-19-2017, eff. 1-1-2018; amd. Ord. 42-20, 12-1-2020, eff. 1-1-2021)

Boise City Code § 9-9-5 IECC ENERGY CODE AMENDMENT, SECTION C104.2, SCHEDULE OF PERMIT FEES

9-9-5: IECC ENERGY CODE AMENDMENT, SECTION C104.2, SCHEDULE OF PERMIT FEES: C104.2 Schedule of permit fees. The fees for residential energy code inspection(s), when applicable under the commercial provisions, reinspections, after hours inspections, or additional plan review after the third review or for modification changes, additions, or revisions after permit issuance, verifying compliance with the Energy Conservation Code of Boise City, shall be assessed in accordance with the provisions of the Boise City Building Code Fee Schedule as adopted by the City Council, which will be kept on file at the Planning and Development Services permit counter, Boise City Clerk's office, or on the Planning and Development Services website. All fees shall be reviewed by the Building Code Board prior to adoption by City Council. (Ord. 43-17, 12-19-2017, eff. 1-1-2018; amd. Ord. 42-20, 12-1-2020, eff. 1-1-2021)

Boise City Code § 9-9-6 IECC ENERGY CODE AMENDMENT, SECTION C104.5, REFUNDS

9-9-6: IECC ENERGY CODE AMENDMENT, SECTION C104.5, REFUNDS: C104.5 Refunds. Any fee refunds shall comply with the provisions of Section 109.6 of the International Building Code as adopted by the Building Code of Boise City or Section R108.5 of the International Residential Code as adopted by the One-And-Two-Family Dwelling Building Code of Boise City, as applicable. (Ord. 42-20, 12-1-2020, eff. 1-1-2021)

Boise City Code § 9-9-7 IECC ENERGY CODE AMENDMENT, SECTION C108, STOP WORK ORDER

9-9-7: IECC ENERGY CODE AMENDMENT, SECTION C108, STOP WORK ORDER: Section C108 shall be repealed in its entirety and replaced with the following: C108 Stop work order. Whenever the code official, or designee, identifies any work regulated by the Energy Conservation Code of Boise City being performed in a manner contrary to the provisions of this code or in a dangerous or unsafe manner, the code official is authorized to issue a stop work order in accordance with Section 115 of the International Building Code as adopted by the Building Code of Boise City or Section R114 of the International Residential Code as adopted by the One-And-Two-Family Dwelling Building Code of Boise City. (Ord. 43-17, 12-19-2017, eff. 1-1-2018; amd. Ord. 42-20, 12-1-2020, eff. 1-1-2021)

Boise City Code § 9-9-8 IECC ENERGY CODE AMENDMENT, SECTION C109, BOARD OF APPEALS PROCESS

9-9-8: IECC ENERGY CODE AMENDMENT, SECTION C109, BOARD OF APPEALS PROCESS: Section C109 shall be repealed in its entirety and replaced with the following: C109 Board of appeals process. Any person, firm, association, or corporation desiring to appeal an order, decision, or determination made by the code official with respect to an application or interpretation of this code shall file a written appeal with the code official within ten (10) calendar days from the date the order, decision, or determination was issued. The party appealing a decision of the City shall include payment of an appeal fee, in the amount specified in the Boise City Building Code Fee Schedule as adopted by the City Council, at time of filing the written appeal request. In the event the appealing party prevails, then the appeal fee shall be returned to the Appellant. Recognizing that the Energy Conservation Code of Boise City is multi-disciplinary, the code official shall schedule the appeal before the appeals board of the most relevant discipline to the issue being appealed. Depending upon the issue raised on appeal, an energy conservation code appeal may be heard by the Building Code Board of Appeals, the Electrical Board, or the Plumbing, Mechanical, and Fuel Gas Board as established by Boise City Code. Ten (10) calendar days prior to the appeal hearing, the appellant shall be notified as to which board will hear the appeal and will be referenced to the applicable ordinance governing appeals to that board. The ordinance which governs the relevant board shall govern the conduct and procedure of the hearing. The hearing shall be held within thirty (30) calendar days of receipt of the notice of appeal or as otherwise agreed upon by the parties to the appeal and the City. Any order, decision, or ruling of the board of appeals may be appealed by filing notice in writing to the City Council within ten (10) calendar days of such order, decision or ruling. (Ord. 43-17, 12-19-2017, eff. 1-1-2018; amd. Ord. 42-20, 12-1-2020, eff. 1-1-2021)

Boise City Code § 9-9-9 IECC ENERGY CODE AMENDMENT, ADD SECTION C110, VIOLATIONS

9-9-9: IECC ENERGY CODE AMENDMENT, ADD SECTION C110, VIOLATIONS: C110 Violations. Violations of any provision of the Energy Conservation Code of Boise City shall be subject to provisions under Section 114 of the International Building Code as adopted by the Building Code of Boise City or Section R113 of the International Residential Code as adopted by the One-And-Two-Family Dwelling Building Code of Boise City. (Ord. 43-17, 12-19-2017, eff. 1-1-2018; amd. Ord. 42-20, 12-1-2020, eff. 1-1-2021)

Boise City Code § 9-9-10 IECC ENERGY CODE AMENDMENT, SECTION C201.3, TERMS DEFINED IN OTHER CODES

9-9-10: IECC ENERGY CODE AMENDMENT, SECTION C201.3, TERMS DEFINED IN OTHER CODES: C201.3 Terms defined in other codes. Terms that are not defined in this code but are defined in the applicable editions of the International Building Code, International Residential Code, International Existing Building Code, National Electrical Code, International Fire Code, International Fuel Gas Code, International Mechanical Code, or the Idaho State Plumbing Code, such terms shall have the meanings ascribed to them as in those codes respectively. (Ord. 43-17, 12-19-2017, eff. 1-1-2018; amd. Ord. 42-20, 12-1-2020, eff. 1-1-2021)

Boise City Code § 9-9-11 IECC ENERGY CODE AMENDMENT, SECTION C202, GENERAL DEFINITIONS, CODE OFFICIAL

9-9-11: IECC ENERGY CODE AMENDMENT, SECTION C202, GENERAL DEFINITIONS, CODE OFFICIAL: CODE OFFICIAL. The building official as defined and established by the International Building Code as incorporated into the Building Code of Boise City, and as defined and established by the International Residential Code as incorporated into the One-And-Two-Family Dwelling Building Code of Boise City, shall be referred to as the code official under this code. The code official shall be responsible for administering and enforcing this code. (Ord. 43-17, 12-19-2017, eff. 1-1-2018; amd. Ord. 42-20, 12-1-2020, eff. 1-1-2021)

Boise City Code § 9-9-12 IECC ENERGY CODE AMENDMENT, SECTION C402.1.1, LOW ENERGY BUILDINGS, ADD EXEMPTIONS 4 AND 5

9-9-12: IECC ENERGY CODE AMENDMENT, SECTION C402.1.1, LOW ENERGY BUILDINGS, ADD EXEMPTIONS 4 AND 5: Add two additional exemption items to Section C402.1.1 as follows: 4. Accessory utility and storage buildings and sports practice buildings accessory to A, B, and E occupancies where buildings maintain no heating or cooling or where intermittent heating and cooling systems are installed. 5. Buildings for domestic water wells, irrigation wells, sewer pump facilities, and sewer lift station buildings where equipment produces internal heat loads and where intermittent heating or cooling is provided to prevent freezing or overheating of equipment. (Ord. 4-25, 2-4-2025)

Boise City Code § 9-9-13 IECC ENERGY CODE AMENDMENT, SECTION C403.5, ECONOMIZERS (PRESCRIPTIVE), ADD EXCEPTION 7

9-9-13: IECC ENERGY CODE AMENDMENT, SECTION C403.5, ECONOMIZERS (PRESCRIPTIVE), ADD EXCEPTION 7: Add Exception number seven (7) to section C403.5, Economizers (Prescriptive) which shall read as follows: 7. Unusual outdoor air contaminate conditions - Systems requiring special outside air filtration and treatment for the reduction and treatment of unusual outdoor contaminants that make an air economizer infeasible. (Ord. 43-17, 12-19-2017, eff. 1-1-2018; amd. Ord. 42-20, 12-1-2020, eff. 1-1-2021)

Boise City Code § 9-9-14 IECC ENERGY CODE AMENDMENT, SECTION R101.1, TITLE

9-9-14: IECC ENERGY CODE AMENDMENT, SECTION R101.1, TITLE: R101.1 Title. Boise City Code Title 9, Chapter 9 shall be known as the Energy Conservation Code of Boise City, and hereinafter may be cited or referred to as "this Chapter" and "this code." (Ord. 43-17, 12-19-2017, eff. 1-1-2018; amd. Ord. 42-20, 12-1-2020, eff. 1-1-2021)

Boise City Code § 9-9-15 IECC ENERGY CODE AMENDMENT, SECTION R104.2, SCHEDULE OF PERMIT FEES

9-9-15: IECC ENERGY CODE AMENDMENT, SECTION R104.2, SCHEDULE OF PERMIT FEES: R104.2 Schedule of permit fees. The fees for residential energy code inspection(s), reinspections, after hours inspections, or additional plan review after the third review or for modification changes, additions, or revisions after permit issuance, verifying compliance with the Energy Conservation Code of Boise City, shall be assessed in accordance with the provisions of the Boise City Building Code Fee Schedule as adopted by the City Council, which will be kept on file at the Planning and Development Services permit counter, Boise City Clerk's office, or on the Planning and Development Services website. All fees shall be reviewed by the Building Code Board prior to adoption by City Council. (Ord. 43-17, 12-19-2017, eff. 1-1-2018; amd. Ord. 42-20, 12-1-2020, eff. 1-1-2021)

Boise City Code § 9-9-16 IECC ENERGY CODE AMENDMENT, SECTION R104.5, REFUNDS

9-9-16: IECC ENERGY CODE AMENDMENT, SECTION R104.5, REFUNDS: R104.5 Refunds. Any fee refunds shall comply with the provisions of Section 109.6 of the International Building Code as adopted by the Building Code of Boise City or Section R108.5 of the International Residential Code as adopted by the One-And-Two-Family Dwelling Building Code of Boise City, as applicable. (Ord. 42-20, 12-1-2020, eff. 1-1-2021)

Boise City Code § 9-9-17 IECC ENERGY CODE AMENDMENT, SECTION R108, STOP WORK ORDER

9-9-17: IECC ENERGY CODE AMENDMENT, SECTION R108, STOP WORK ORDER: Section R108 shall be repealed in its entirety and replaced with the following: R108 Stop work order. Whenever the code official, or designee, identifies any work regulated by the Energy Conservation Code of Boise City being performed in a manner contrary to the provisions of this code or in a dangerous or unsafe manner, the code official is authorized to issue a stop work order in accordance with Section 115 of the International Building Code as adopted by the Building Code of Boise City or Section R114 of the International Residential Code as adopted by the One-And-Two-Family Dwelling Building Code of Boise City. (Ord. 43-17, 12-19-2017, eff. 1-1-2018; amd. Ord. 42-20, 12-1-2020, eff. 1-1-2021)

Boise City Code § 9-9-18 IECC ENERGY CODE AMENDMENT, SECTION R109, BOARD OF APPEALS PROCESS

9-9-18: IECC ENERGY CODE AMENDMENT, SECTION R109, BOARD OF APPEALS PROCESS: Section R109 shall be repealed in its entirety and replaced with the following: R109 Board of appeals process. Any person, firm, association, or corporation desiring to appeal an order, decision, or determination made by the code official with respect to an application or interpretation of this code shall file a written appeal with the code official within ten (10) calendar days from the date the order, decision, or determination was issued. The party appealing a decision of the City shall include payment of an appeal fee, in an amount specified in the Boise City Building Code Fee Schedule as adopted by the City Council, at time of filing the written appeal request. In the event the appealing party prevails, then the appeal fee shall be returned to the Appellant. Recognizing that the Energy Conservation Code of Boise City is multi-disciplinary, the code official shall schedule the appeal before the appeals board of the most relevant discipline to the issue being appealed. Depending upon the issue raised on appeal, an energy conservation code appeal may be heard by the Building Code Board of Appeals, the Electrical Board, or the Plumbing, Mechanical, and Fuel Gas Board as established by Boise City Code. Ten (10) calendar days prior to the appeal hearing, the appellant shall be notified as to which board will hear the appeal and will be referenced to the applicable ordinance governing appeals to that board. The ordinance which governs the relevant board shall govern the conduct and procedure of the hearing. The hearing shall be held within thirty (30) calendar days of receipt of the notice of appeal or as otherwise agreed upon by the parties to the appeal and the City. Any order, decision, or ruling of the board of appeals may be appealed by filing notice in writing to the City Council within ten (10) calendar days of such order, decision or ruling. (Ord. 43-17, 12-19-2017, eff. 1-1-2018; amd. 2019 Code; Ord. 42-20, 12-1-2020, eff. 1-1-2021)

Boise City Code § 9-9-19 IECC ENERGY CODE AMENDMENT, ADD SECTION R110, VIOLATIONS

9-9-19: IECC ENERGY CODE AMENDMENT, ADD SECTION R110, VIOLATIONS: R110 Violations. Violations of any provision of the Energy Conservation Code of Boise City shall be subject to provisions under Section 114 of the International Building Code as adopted by the Building Code of Boise City or Section R113 of the International Residential Code as adopted by the One-And-Two-Family Dwelling Building Code of Boise City. (Ord. 43-17, 12-19-2017, eff. 1-1-2018; amd. Ord. 42-20, 12-1-2020, eff. 1-1-2021)

Boise City Code § 9-9-20 IECC ENERGY CODE AMENDMENT, SECTION R201.3, TERMS DEFINED IN OTHER CODES

9-9-20: IECC ENERGY CODE AMENDMENT, SECTION R201.3, TERMS DEFINED IN OTHER CODES: R201.3 Terms defined in other codes. Terms that are not defined in this code but are defined in the applicable editions of the International Building Code, International Residential Code, International Existing Building Code, National Electrical Code, International Fire Code, International Fuel Gas Code, International Mechanical Code, or the Idaho State Plumbing Code, such terms shall have the meanings ascribed to them as in those codes respectively. (Ord. 43-17, 12-19-2017, eff. 1-1-2018; amd. Ord. 42-20, 12-1-2020, eff. 1-1-2021)

Boise City Code § 9-9-21 IECC ENERGY CODE AMENDMENT, SECTION R202, GENERAL DEFINITIONS, CODE OFFICIAL

9-9-21: IECC ENERGY CODE AMENDMENT, SECTION R202, GENERAL DEFINITIONS, CODE OFFICIAL: R201.3 Terms defined in other codes. Terms that are not defined in this code but are defined in the applicable editions of the International Building Code, International Residential Code, International Existing Building Code, National Electrical Code, International Fire Code, International Fuel Gas Code, International Mechanical Code, or the Idaho State Plumbing Code, such terms shall have the meanings ascribed to them as in those codes respectively. (Ord. 43-17, 12-19-2017, eff. 1-1-2018; amd. Ord. 42-20, 12-1-2020, eff. 1-1-2021)

Boise City Code § 9-9-22 IECC ENERGY CODE AMENDMENT, SECTION R202, GENERAL DEFINITIONS, CONDITIONED SPACE

9-9-22: IECC ENERGY CODE AMENDMENT, SECTION R202, GENERAL DEFINITIONS, CONDITIONED SPACE: Add the following to the definition of "Conditioned Space": This definition shall not apply to garage spaces or other similar spaces where heating or cooling is installed for frost protection or intermittent use. (Ord. 4-25, 2-4-2025)

Boise City Code § 9-9-23 IECC ENERGY CODE AMENDMENT, TABLE R402.1.2, INSULATION AND FENESTRATION REQUIREMENTS BY COMPONENT

9-9-23: IECC ENERGY CODE AMENDMENT, TABLE R402.1.2, INSULATION AND FENESTRATION REQUIREMENTS BY COMPONENT: Repeal the row in Table R402.1.2 for climate zones "5 and Marine 4" and replace with the following: TABLE R402.1.2 INSULATION AND FENESTRATION REQUIREMENTS BY COMPONENTa, j Climate Zone | Fenestration U-Factorb | Sky lightb U-Factor | Glazed Fenestration SHGC b,e | Ceiling R-Value | Wood Frame Wall R-Value | Mass Wall R-Valuei | Floor R-Value | Basementc Wall R-Value | Slabd R-Value & Depth | Crawl-Spacec Wall R-Value 5 | 0.3 2 | 0.5 5 | NR | 38 | 20 or 13+ 5h | 13/17 | 30g | 15/19 | 10, 2 ft | 15/19 Footnotes published underneath Table R402.1.2 in the code are applicable. (Ord. 42-20, 12-1-2020, eff. 1-1-2021; Ord. 4-25, 2-4-2025)

Boise City Code § 9-9-24 IECC ENERGY CODE AMENDMENT, TABLE R402.1.2, INSULATION AND FENESTRATION REQUIREMENTS BY COMPONENT, ADD FOOTNOTE J

9-9-24: IECC ENERGY CODE AMENDMENT, TABLE R402.1.2, INSULATION AND FENESTRATION REQUIREMENTS BY COMPONENT, ADD FOOTNOTE J: Add footnote j to the title of table R402.1.2 - Insulation and Fenestration Requirements by Component. Add footnote j underneath table R402.1.2 after footnote i to read as follows: j. For residential log home building thermal envelope construction requirements see section R402.6. (Ord. 43-17, 12-19-2017, eff. 1-1-2018; amd. Ord. 42-20, 12-1-2020, eff. 1-1-2021; Ord. 4-25, 2-4-2025)

Boise City Code § 9-9-25 IECC ENERGY CODE AMENDMENT, TABLE R402.1.4, EQUIVALENT U-FACTORS

9-9-25: IECC ENERGY CODE AMENDMENT, TABLE R402.1.4, EQUIVALENT U-FACTORS: Repeal the row in Table R402.1.4 for climate zones "5 and Marine 4" and replace with the following: TABLE R402.1.4 EQUIVALENT U-FACTORSa Climate Zone | Fenestration U-Factor | Skylight U-Factor | Ceiling U-Factor | Frame Wall U-Factor | Mass Wall U-Factorb | Floor U-Factor | Basement Wall U-Factor | Crawl- Space Wall U-Factor 5 | 0.32 | 0.55 | 0.03 0 | 0.06 0 | 0.08 2 | 0.03 3 | 0.05 0 | 0.05 5 Footnotes published underneath Table R402.1.4 in the code are applicable. (Ord. 42-20, 12-1-2020, eff. 1-1-2021)

Boise City Code § 9-9-26 IECC ENERGY CODE AMENDMENT, SECTION R402.4.1.2, TESTING, ADD EXCEPTION

9-9-26: IECC ENERGY CODE AMENDMENT, SECTION R402.4.1.2, TESTING, ADD EXCEPTION: Add the following exception to Section R402.4.1.2, Testing: Exception. Visual Inspection. The permit holder will determine at the time of permit application the method of determining building envelope tightness. A visual inspection shall be considered acceptable in lieu of testing when the items listed in Table R402.4.1.1, applicable to the method of construction, are field verified. (Ord. 43-17, 12-19-2017, eff. 1-1-2018; amd. Ord. 42-20, 12-1-2020, eff. 1-1-2021; Ord. 4-25, 2-4-2025)

Boise City Code § 9-9-27 IECC ENERGY CODE AMENDMENT, ADD SECTION R402.6, RESIDENTIAL LOG HOME THERMAL ENVELOPE

9-9-27: IECC ENERGY CODE AMENDMENT, ADD SECTION R402.6, RESIDENTIAL LOG HOME THERMAL ENVELOPE: R402.6 Residential log home thermal envelope. Residential log home construction shall comply with sections R401 (General), R402.4 (Air Leakage), R402.5 (Maximum Fenestration U-Factor and SHGC), R403.1 (Controls), the mandatory sections of Sections R403.3 through R403.9, Section R404 (Electrical Power and Lighting Systems), and either item i., ii., or iii. as follows: i. Sections R402.2 through R402.3, R403.3.1 (Insulation), R404.1 (Lighting equipment), and Table R402.6 (Log Home Prescriptive Thermal Envelope Requirements by Component); ii. Section R405 (Simulated Performance Alternative); or iii. REScheck (U.S. Department of Energy Building Codes Program). (Ord. 43-17, 12-19-2017, eff. 1-1-2018; amd. Ord. 42-20, 12-1-2020, eff. 1-1-2021)

Boise City Code § 9-9-28 IECC ENERGY CODE AMENDMENT, ADD TABLE R402.6, LOG HOME PRESCRIPTIVE THERMAL ENVELOPE REQUIREMENTS BY COMPONENT

9-9-28: IECC ENERGY CODE AMENDMENT, ADD TABLE R402.6, LOG HOME PRESCRIPTIVE THERMAL ENVELOPE REQUIREMENTS BY COMPONENT: TABLE R402.6 LOG HOME PRESCRIPTIVE THERMAL ENVELOPE REQUIREMENTS BY COMPONENT Climate Zone | Fenestration U-Factora | Skylight U-Factor | Glazed Fenestration SHGC | Ceiling R-Value | Min. Average LOG Size In Inches | Floor R-Value | Basement Wall R-Valued | Slab R-Value & Depthb | Crawl Space 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 For SI: 1 foot = 304.8 mm 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 base board 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. 43-17, 12-19-2017, eff. 1-1-2018; amd. Ord. 42-20, 12-1-2020, eff. 1-1-2021)
Source: Boise City, Idaho, City Code and City Charter (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/boise_id/latest/boise/0-0-0-10652Fetched: 11/1/2026

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