Seattle.gov Home Page
Seattle.gov This Department
Link to Seattle City Light Home Page Link to Seattle City Light Home Page Link to Seattle City Light About Us Page Link to Seattle City Light Contact Us Page
Lighting Seattle since 1905 Jorge Carrasco, Superintendent
Conservation: Be Smart & Build Smart

Built Smart Users Manual: Specifications
Contact an Energy Advisor
(206) 684-3800

SCLEnergyAdvisor@seattle.gov
Chapter 1:
Qualifying a Built Smart Building


Built Smart Users Manual | Specifications | Alerts | Water

1.1 Existing Codes and Regulations
These specifications are intended to meet or exceed current building codes and Federal regulations. In any case where a Federal, State or local code or regulation exceeds these requirements, that code or regulation applies.

1.2 Qualifying a Building
A building design must be reviewed and authorized by your BUILT SMART representative and a BUILT SMART Agreement must be executed. The building must meet Section 1.5 through one of the three Prescriptive Path options.

Buildings must meet all requirements in order to qualify for a BUILT SMART incentive, including thermal efficiency, HVAC, indoor air quality and required lighting.

1.3 Calculating Building Incentives
  • 1.3.1 All BUILT SMART buildings that meet all minimum values for thermal shell upgrade incentives shall be paid incentives based on square footage of individual thermal component upgrades of the building
  • 1.3.2 Required interior common area lighting incentives are calculated based on their improvement over Energy Code lighting power density allowances.
  • 1.3.3 Incentives for exterior lighting, interior lighting controls, in-unit lighting, whole house fans, and heating controls are based on a per-fixture rebate.
1.4 Plans Review
Building plans and any design changes must be reviewed and verified by a BUILT SMART representative. A copy of the architectural plans of the building shall be provided for the BUILT SMART Program permanent files.

1.5 Envelope Requirements for Electrically Heated Multifamily Residences
(See footnotes)

To qualify for the Built Smart Full-measure Program, buildings must follow one of the three compliance paths below. Buildings with greater than 25% glazing to floor area are not eligible for the BUILT SMART Program.

Option %Glazing to Floor Area Glazing U-Value Maximum Unglazed Doors U-Value (Attic) Ceiling Vaulted or Flat Roof Ceiling Wall Above Grade Wall Below Grade Elevated Slab Over Heated Space Elevated Slab Over Unheated Space Under Floor Slab On-Grade Perimeter
I1 Up to 12% & 2x4 Wall U-0.334 U-0.19 R-49 Adv5 R-38 R-15 Int6 R-15 See Footnote 7 See
Footnote 8
R-30 R-10
II2 Up to 12% & 2x6 Wall U-0.334 U-0.19 R-49 Adv5 R-38 R-21 Int6 R-21 See Footnote 7 See
Footnote 8
R-30 R-10
III3 12 - 25% & 2x6 Wall U-0.334 U-0.19 R-49 Adv5 R-38 R-21 Int6 R-21 See Footnote 7 See
Footnote 8
R-30 R-10

Other Required Measures
In order to qualify for building envelope incentives, buildings must also install:
  · Heating Thermostats............................. See Chapter 4 for specifications
  · Whole House Fan Timer........................ See Chapter 5 for specifications
  · Common Area Lighting.......................... See Chapter 6 for specifications


Incentives Available for Optional Measures
Builders are not required, but are encouraged to take advantage of incentives for:
  · Common Area Lighting Controls.............. See Chapter 6
  · In-Unit Lighting...................................... See Chapter 6
  · Efficient Clothes Washers...................... See Chapter 7
  · HVAC Upgrades.................................... See Chapter 8
  · Energy Efficient Elevator Systems.......... See Chapter 9
  · Commercial Area Upgrades.................... See Chapter 10

Footnotes to chart
  1. For buildings with up to 12% glazing to floor ratio and 2x4 exterior wall construction.

  2. For buildings with up to 12% glazing to floor ratio and 2x6 exterior wall construction.

  3. For buildings with glazing to floor percentages of 12% to 25% with 2x6 exterior wall construction.

  4. Glazing U-Factors Area Determination: U-values shall be assigned to all glazing units according to the NFRC Table for sizes of all product types: Residential or Non-Residential Model Sizes. Glazing U-Values based on the NFRC Certified Products Directory (www.nfrc.org). Total area weighted U-value for sum of all individual windows located in the residential portions of the building is required. The determination of the percentage of glazing in a multifamily building, in relation to the total square foot floor area of the multifamily building, shall use the total gross square foot of only the residential floors of the building as the basis for the percentage calculation.

  5. Advanced-Frame Attic: Any combination of heel height, insulation material and baffles that provides the required ventilation space and a minimum of R-38 insulation at the interior edge of exterior walls. The insulation shall increase to the full R-value at the highest rate allowed by the roof pitch and taper down to reach the outside edge of the exterior wall or to blocking between rafters.

  6. Intermediate Framing: Wood-framed on 16-inch centers with double top plate and single bottom plate. Corners use two studs or other means of fully insulating corners and each opening is framed by two studs. All headers shall be insulated with a minimum of R-10 insulation. Interior partition wall and exterior wall intersections shall be fully insulated in the exterior wall.
    Weighting Factors:
    • Studs and Plates 0.18
    • Insulated Cavity 0.78
    • Headers 0.04
    (Units with steel framing must have U-Factors equal to intermediate-framed wood walls.)

  7. Elevated Residential Slab (ERS) Over Heated Space
    • If slab and building footprint are equal: R-10 (F-0.05) is required at slab perimeter.
    • If slab is greater than the building footprint: R-15 (U-0.057) is required above slab.

  8. Elevated Residential Slab (ERS) Over Unheated Space
    • If slab and building footprint are equal: R-30 (U-0.031) is required below slab and R-10 (F-0.05) is required at slab perimeter; OR R-15 (U-0.057) is required above slab.
    • If slab is greater than the building footprint: R-15 (U-0.057) is required above slab.

  9. Elevated Residential Slab (ERS) Over Heated or Unheated Space - Calculated Method
    • The requirements in footnotes 7 or 8, above, must be met in order for the units on the elevated residential slab to be eligible for BUILT SMART incentives.
    • If any BUILT SMART measures are used to calculate ERS below minimum values required, all calculations must be reviewed by the BUILT SMART representative to determine program eligibility and incentive levels. See Appendix C for details.

Interested in BUILT SMART incentives?
Contact Peter Held at peter.held@seattle.gov or 206.684.3605. For affordable housing projects, please contact Lisa Frasene at lisa.frasene@seattle.gov or 206.684.3182.

BUILT SMART Home | BUILT SMART Users Manual

The Seattle City Light Web Team:

Seattle City Light -- 700 5th Avenue, Suite 3200, Seattle, WA 98104-5031 -- 206.684.3000
Mailing address: 700 5th Avenue, Suite 3200, P.O. Box 34023 Seattle, WA 98124-4023