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A. Purpose and Intent. It is the purpose and intent of this section to require installation of specific energy efficiency measures in less energy efficient homes, when such homes undertake additions or remodels, in order to reduce GHG emissions resulting from energy consumption.

B. Applicability. This section applies to dwelling units constructed before 2006, that are undergoing a permitted Addition or Remodel, either in Low-Rise Residential Buildings (as defined in Title 24, Part 6, Section 100.1) with one to four dwelling units, or that are individually owned residential condominiums and townhouses. EXCEPTION: This section shall not be triggered by creation of a new Accessory dwelling unit (ADU) or Junior accessory dwelling unit (JADU) alone. This section does apply to Additions to, or Remodels of, existing ADUs or JADUs.

C. Definitions. For purposes of this section, the following terms shall have the following meanings:

Addition. See definition in Title 24, Part 6, Section 100.1(b).

Compliance Report” means a Certificate of Compliance generated by approved Energy Code compliance software, including CBECC-Res and EnergyPro.

“Condo” means an individually owned residential unit within a building containing five or more dwelling units.

“Home” means a residential building containing between one and four dwelling units.

“Remodel” means any of the following:

1. Any change or rearrangement, other than a repair, of the structural elements of an existing building including foundations, footing, sub-floors, lintels, beams, columns, girders, slabs, roof trusses, staircases, load bearing walls, door frames, window frames, or any other part of the building that resists force or movement.

2. Change or rearrangement of the plan configuration of walls and full-height partitions of an existing building.

“Steep Slope” means a roof slope greater than two units vertical in 12 units horizontal (17 percent slope).

“Total Energy Use” means the energy consumption estimated by approved Energy Code compliance software, including CBECC-Res and EnergyPro, in terms of kTDV per square foot per year (kTDV/sf2 – yr).

D. Requirements. The following requirements shall apply to the entire dwelling unit, not just the additional or altered portion. Where these requirements conflict with other energy code requirements, the stricter requirement shall prevail. Homes and Condos shall comply with either the Prescriptive Approach or the Performance Approach.

1. Prescriptive Approach.

a. The Minimum Number of Energy Upgrade Measures shown below in Table 15.26.040(D)(1)(a) must be completed in accordance with the building type, construction date and climate zone.

Table 15.26.040(D)(1)(a). Minimum Number of Energy Upgrade Measures

Year Built

Building Type

Climate Zone 7

Climate Zone 10

Before 1978

Homes and Condos

Choose 3 Energy Upgrade Measures

Choose 4 Energy Upgrade Measures

1978-1991

Condos

Choose 3 Energy Upgrade Measures

Homes

Choose 2 Energy Upgrade Measures

1992-2005

Homes and Condos

Choose 2 Energy Upgrade Measures

b. Additions or Remodels involving steep sloped roof replacement, recovering or recoating of either more than 50 percent or more than 2,000 square feet of roof area, or new steep sloped roof sections of any size, are also required to meet the Cool Roof requirements in Table 15.26.040(D)(1)(b) for the roofing material added to:

i. Homes constructed pre-1978 in climate zone 7 or pre-2006 in climate zone 10.

ii. Condos constructed pre-1992 in climate zone 7 or pre-2006 in climate zone 10.

c. Qualifying Energy Upgrade Measures that count toward satisfying the minimum indicated in Table 15.26.040(D)(1)(a) shall be chosen from the Prescriptive Energy Upgrade Measure List shown below in Table 15.26.040(D)(1)(c), and shall be completed in accordance with the specifications therein. Materials must meet the parameters included below in Table 15.26.040(D)(1)(c) as a minimum. More energy efficient materials may be substituted.

Table 15.26.040(D)(1)(c). Prescriptive Energy Upgrade Measure List (section references are to California Code of Regulations, Title 24, Part 6, Subchapter 8)

Package

Specification

R-38 Attic Insulation

Add attic insulation in buildings with vented attic spaces to meet R-38 per requirements of section 150.1(c)1Aii or iii.

Air Sealing

Apply air sealing practices throughout all accessible areas of the building. All joints, penetrations and other openings in the building envelope that are potential sources of air leakage shall be caulked, gasketed, weather stripped, or otherwise sealed to limit infiltration and exfiltration. Buildings constructed before 1992 should be sealed to 7 Air Changes per Hour (ACH) and buildings constructed from 1992-2005 should be sealed to 5 ACH, at 50 Pascals pressure difference. Homes with one or more vented combustion appliances must have a BPI Combustion Appliance Safety Inspection performed after air sealing.

Cool Roof

For steep slope roofs, install a roofing product rated by the Cool Roof Rating Council (CRRC) with an aged solar reflectance of 0.25 or higher and thermal emittance of 0.75 or higher.

Duct Sealing

Air seal all ductwork to meet the requirements of Section 150.2(b)1E as if the heating system were being replaced.

LED Lighting

Replace screw-in halogen, incandescent or CFL light bulbs with LED light bulbs in accordance with the requirements of Section 150.0(k)1.A, D, G, H and I.

Water Heating Package

1. Water Heater Blanket: Add R-6 insulation to the exterior of existing residential tank storage water heaters manufactured before April 2015. Requirement is waived for water heaters with internal tank insulation of at least R-16.

2. Hot Water Pipe Insulation - Insulate all accessible hot water pipes with R-3 pipe insulation per requirements of section 150.0(j)2.A.

3. Low Flow Fittings - Upgrade sink and shower fittings to meet current CALGreen requirements, which require maximum flow rates of 1.8 gallons per minute (gpm) for showerheads and kitchen faucets, and 1.2 gpm for bathroom faucets per requirements of CALGreen Section 4.303.

Windows

Replace existing single pane windows with a dual pane product, which has a U-factor equal to 0.32 or lower and a Solar Heat Gain Coefficient (SHGC) equal to 0.25 or lower. This measure was only evaluated for the pre-1978 vintage, which is assumed to have single-pane, metal-frame windows.

Water Heater Replacement

High Efficiency Heat Pump Water Heater: Replace natural gas storage water heater, or tankless water heater having an Energy Factor of .81 or less, with Heat Pump Water Heater with Uniform Energy Factor (UEF) of at least 3.1 (Northwest Energy Efficiency Alliance Tier 3).

-or-

High Efficiency Tankless Water Heater: Replace natural gas storage water heater, or tankless water heater having an Energy Factor of .81 or less, with tankless water heater with a minimum Energy Factor of 0.96.

Air Conditioner Replacement

High Efficiency Air Conditioner: Replace an existing air conditioner having a SEER rating of 13 or less with an air conditioner of at least 18 SEER.

-or-

High Efficiency Heat Pump: Replace an existing air conditioner having a SEER rating of 13 or less with a Heat Pump of at least 18 SEER.

d. Measure Already Completed. Where measures substantially similar to those specified in Table 15.26.040(D)(1)(c) are already in place, they shall count toward satisfaction of the Minimum Number of Energy Upgrade Measures in Table 15.26.040(D)(1)(a).

e. Project Value Cutoff. If the cost of completing the Minimum Number of Energy Upgrade Measures in Table 15.26.040(D)(1)(a) is projected to exceed 20 percent of the projected cost of the Addition or Remodel absent those measures, permit applicants can propose a more limited set from among Prescriptive Energy Upgrade Measure List in Table 15.26.040(D)(1)(c) which does not exceed 20 percent. The limited set must include as many of the required measures as possible without exceeding the 20 percent cutoff.

2. Performance Approach.

a. Complete any energy saving measures concurrent with Addition or Remodel that are projected to result in equivalent or lower energy usage than the Assumed Energy Upgrade Measures indicated in Table 15.26.040(D)(2)(a) below.

Table 15.26.040(D)(2)(a). Assumed Energy Upgrade Measures for Performance Equivalency

Year Built

Building Type

Climate Zone 7

Climate Zone 10

Before 1978

Homes and Condos

R38 Attic Insulation; Duct Sealing

Duct Sealing; R38 Attic; Air Sealing

1978-1991

Condos

Duct Sealing

Homes

N/A

1992-2005

Homes and Condos

N/A

b. Shall be demonstrated by the following method:

i. Install the LED Lighting and Water Heater Blanket measures as specified in Table 15.26.040(D)(1)(c).

ii. Submit two compliance reports. One compliance report shall be generated from a model of the proposed energy performance measures, and the existing home plus the proposed addition(s) and any other alterations. A second compliance report shall be generated by modeling the existing home with the Energy Upgrade Measures shown in Table 15.26.040(D)(2)(a) including proposed addition(s) and other alterations, but not including the proposed energy saving measures. The Total Energy Use for the first compliance report must be equal or less than that of the second compliance report.

E. Exemptions. The requirements of this section may be waived, in part or in whole, if any of the following conditions are met, to the satisfaction of the City Manager or designee:

1. Technical Infeasibility. Prescribed measure would be technically infeasible or not be cost-effective due to unique characteristics of home or other special circumstances.

a. Evidence requirement to show lack of cost effectiveness: Letter from certified energy professional attesting to the lack of cost effectiveness with explanation of methodology and calculation.

b. Evidence to show technical infeasibility: Letter from licensed building professional documenting infeasibility for one of the following reasons: inaccessibility, violation of other codes, low likelihood of success, measure would affect proper functioning of other building elements, result in safety risks, cause harm to building occupants.

2. High Performing Home. Home has earned a Home Energy Score of eight or above within the previous three years.

3. Fully Solar Powered. Home is powered by a solar PV system offsetting at least 95 percent of the annual electricity demand and gas-equivalent energy consumption.

4. Exempt Projects. Additions or Remodels that would not otherwise be subject to this section but for work related to Solar PV, Solar water heating, EV charging, electrical upgrades for solar PV or EV charging, or energy storage are exempt.

5. Homeowner’s Association. A measure is beyond the authority of the homeowner as defined in applicable Homeowner’s Association (HOA) covenants, conditions or restrictions.

6. Medical Necessity. An Addition or Remodel consists solely of medically necessary improvements.

7. Low-Income. If an applicant can demonstrate they qualify for low-income assistance as defined in Section 1-100 of the City’s Master Fee Schedule.

F. Implementation Authority. The City Manager may adopt rules and regulations for the implementation of this section including, without limitation, supplementing the list of qualified measures set forth in Table 15.26.040(D)(1)(c) as new energy efficient technologies or materials are developed. (Ord. 3495 § 1, 2020).