The 2006 Seattle Energy Code consists of the 2006 Washington State Energy Code plus Seattle amendments. Many existing Seattle amendments were carried over from the previous Energy Code, or deleted in those cases where previous Seattle amendments were incorporated into the 2006 Washington State Energy Code. New Seattle amendments have been adopted for the following sections and tables:
- 201: Clarify documentation for insulation materials, add definition of building entrance as a companion change to air leakage.
- 1001.5: Add table of default R-values for commonly used building materials.
- 1005.1: Provide individual table numbering, expand default options for peripheral edges of intermediate concrete floors, and add table of default U-factors for metal building walls.
- 1007.1: Provide individual table numbering, add table of default U-factors for metal building roofs, and add table with default U-factors for roofs with insulation entirely above deck.
- 1132.2: Clarify application to computer room equipment in mechanical system alterations, air-handling units located outdoors, and chiller efficiency improvements.
- 1310.2: Clarify that semi-heated spaces are calculated separately from other conditioned spaces.
- 1314: Modify to better address air leakage per ASHRAE/IESNA Standard 90.1,
addendum c, and IECC 502.4.2.
- 1322: Revise exceptions 2 & 3 for consistency with Tables 10-7G and 13-1.
- Table 13-1: Increase insulation levels and improve glazing heating and cooling performance.
- 1411.1: Modify exception so that chillers designed for non-standard conditions must show compliance with the nearest value in table; and address equipment not rated.
- 1411.5: Revise to require occupancy sensor to reduce energy waste.
- 1412.4.1: Revise exceptions for non-motorized dampers for consistency with Standard 90.1.
- 1412.9 (formerly Section 1412.8): Delete existing Seattle amendment and refer to the Seattle Mechanical Code as this issue is now addressed in Section 404 of that document.
- 1413.1: Clarify when waterside economizer is allowed to be used.
- 1420-1423: Delete simple systems section to create consistent requirements for all system types.
- 1431.2: Provide prescriptive sizing option in exception 4
- 1433: Revise exemptions to lower threshold to 33,000 Btuh, lower total capacity of all units without economizers, and add clarifying note; revise to only exempt open refrigerator cases.
- 1436.1: Set thresholds for different outside air supply rates.
- 1438: Revise to require variable speed drive for all fans and pumps of 7.5 hp and larger.
- 1454: Require the side and bottom surfaces of spas to be insulated.
- Tables 14-1C and 14-1K, 14-1L, and 14-1M: Increase minimum efficiencies for chillers and corresponding changes to Tables14-1K, 14-1L, and 14-1M.
- Table 14-1G: Clarify application.
- 1512.2: Clarify application to furniture-mounted task lighting.
- Table 15-1: Reduce lighting power allowances to 0.95 W/ft2 for office and to 2.7 W/ft2 (1.5 + 1.2) for retail spaces over 3,000 ft2, insert “ceramic metal halide and other” HID.
- RS-29, Section 3.3.1: Standard design glazing area to be same as proposed for small window areas and to use metal stud wall construction.
- RS-29, Section 3.4.4: Standard Design fan system to comply with ASHRAE Standard 90.1.
- RS-29, Table 3-3: Standard Design to not have electric resistance space heat and to have chilled water systems.
The complete text of the Ordinance 122530 can be viewed at the City Clerk’s website at www.seattle.gov/leg/clerk/clerk.htm.