Washington Administrative Code

Table B103(9)School Occupancya Schedule for OccupancySchedule for Lightingb/Receptacle Schedule for Service Hot WaterSchedule for ElevatorHour of Day (time)Percent ofMaximum LoadPercent ofMaximum LoadSchedule forHVACSystemPercent ofMaximum LoadPercent ofMaximum Load WkSatSunWkSat…

As required by Sections C302.2 and R302.2, the heating or cooling outdoor design temperatures shall be selected from Table C-1.[Statutory Authority: RCW 19.27A.020, 19.27A.025 and chapters 19.27 and 34.05 RCW. WSR 13-04-056, § 51-11C-80000, filed 2/1/13, effective 7/1/13.]

Table C-1Outdoor Design Temperatures Outdoor Design Temp. HeatingOutdoor Design Temp. CoolingLocation(°F)(°F)Aberdeen 20 NNE25 83 Anacortes24 72 Anatone-4 89 Auburn25 84 Battleground19 91 Bellevue24 83 Bellingham 2 N19 78 Blaine17 73 Bremerton29 83 Burlington19 77 Chehalis21 87 C…

D101 Scope. This appendix establishes criteria for demonstrating compliance using the HVAC total system performance ratio (HVAC TSPR) for systems serving office (including medical offices), retail, library and education occupancies and buildings, which are subject to the requirem…

[Statutory Authority: RCW 19.27A.020, 19.27A.025, 19.27A.160 and chapters 19.27A and 19.27 RCW. WSR 22-14-091, 23-12-101, and 23-20-021, § 51-11C-90000, filed 7/1/22, 6/7/23, and 9/25/23, effective 3/15/24. Statutory Authority: RCW 19.27A.020, 19.27A.025, 19.27A.160 and chapter 1…

Informational Note:The provisions contained in this appendix are not mandatory unless specifically referenced in the adopting ordinance.F101.1 General. This section is an outcome-based energy budget compliance requirement pursuant to RCW 19.27A.160 to incrementally move toward ac…

[Statutory Authority: RCW 19.27A.020, 19.27A.045 and chapters 19.27 and 34.05 RCW. WSR 13-04-055, § 51-11R-10000, filed 2/1/13, effective 7/1/13.]Reviser's note: The brackets and enclosed material in the text of the above section occurred in the copy filed by the agency.

R101.1 Title. This code shall be known as the Washington State Energy Code-Residential, and shall be cited as such. It is referred to herein as "this code."The 2021 edition of the Washington State Energy Code is hereby adopted. The Washington State Energy Code adopted under chapt…

R102.1 General. The provisions of this code are not intended to prevent the installation of any material or to prohibit any design or method of construction not specifically prescribed by this code, provided that any such alternative has been approved. The code official shall hav…

R103.1 General. Construction documents, technical report, and other supporting data shall be submitted in one or more sets, or in a digital format where allowed by the code official, with each application for a permit. The construction documents and technical reports shall be pre…

R104.1 Fees. A permit shall not be issued until the fees prescribed in Section R104.2 have been paid, nor shall an amendment to a permit be released until the additional fee, if any, has been paid.R104.2 Schedule of permit fees. A fee for each permit shall be paid as required, in…

R105.1 General. Construction or work for which a permit is required shall be subject to inspection by the code official or his or her designated agent, and such construction or work shall remain visible and able to be accessed for inspection purposes until approved. It shall be t…

R106.1 Approval. After the prescribed tests and inspections indicate that the work complies in all respects with this code, a notice of approval shall be issued by the code official.R106.2 Revocation. The code official is authorized to, in writing, suspend or revoke a notice of a…

R107.1 General. If a portion of this code is held to be illegal or void, such a decision shall not affect the validity of the remainder of this code.[Statutory Authority: RCW 19.27A.020, 19.27A.045, 19.27A.160, and chapter 19.27A RCW. WSR 23-02-060, 23-12-102, and 23-20-022, § 51…

R108.1 Referenced codes and standards. The codes and standards referenced in this code shall be those listed in Chapter 6, and such codes and standards shall be considered as part of the requirements of this code to the prescribed extent of each such reference and as further regu…

R109.1 Authority. Whenever the code official finds any work regulated by this code being performed in a manner either contrary to the provisions of this code or dangerous or unsafe, the code official is authorized to issue a stop work order.R109.2 Issuance. The stop work order sh…

R110.1 General. In order to hear and decide appeals of orders, decisions or determinations made by the code official relative to the application and interpretation of this code, there shall be and is hereby created a board of appeals. The code official shall be an ex officio memb…

It shall be unlawful for any person, firm, or corporation to erect or construct any building, or remodel or rehabilitate any existing building or structure in the state, or allow the same to be done, contrary to or in violation of any of the provisions of this code.[Statutory Aut…

Nothing contained in this code is intended to be nor shall be construed to create or form the basis for any liability on the part of any city or county or its officers, employees, or agents for any injury or damage resulting from the failure of a building to conform to the provis…

[Statutory Authority: RCW 19.27A.020, 19.27A.045 and chapters 19.27 and 34.05 RCW. WSR 13-04-055, § 51-11R-20000, filed 2/1/13, effective 7/1/13.]Reviser's note: The brackets and enclosed material in the text of the above section occurred in the copy filed by the agency.

R201.1 Scope. Unless stated otherwise, the following words and terms in this code shall have the meanings indicated in this chapter.R201.2 Interchangeability. Words used in the present tense include the future; words in the masculine gender include the feminine and neuter; the si…

[Statutory Authority: RCW 19.27A.020, 19.27A.045 and chapters 19.27 and 34.05 RCW. WSR 13-04-055, § 51-11R-20200, filed 2/1/13, effective 7/1/13.]

ABOVE-GRADE WALL. A wall enclosing conditioned space that is not a below-grade wall. This includes between-floor spandrels, peripheral edges of floors, roof and basement knee walls, dormer walls, gable end walls, walls enclosing a mansard roof and skylight shafts.ACCESS (TO). Tha…

BASEMENT WALL. See above-grade wall and below-grade wall.BELOW-GRADE WALL. That portion of a wall in the building envelope that is entirely below the finish grade and in contact with the ground.BUILDING. Any structure used or intended for supporting or sheltering any use or occup…

C-FACTOR (THERMAL CONDUCTANCE). The coefficient of heat transmission (surface to surface) through a building component or assembly, equal to the time rate of heat flow per unit area and the unit temperature difference between the warm side and cold side surfaces (Btu/h ft2 × °F) …

DEMAND RECIRCULATION WATER SYSTEM. A water distribution system where one or more pumps prime the service hot water piping with heated water upon demand for hot water.DIMMER. A control device that is capable of continuously varying the light output and energy use of light sources.…

ENERGY ANALYSIS. A method for estimating the annual energy use of the proposed design and standard reference design based on estimates of energy use.ENERGY COST. The total estimated annual cost for purchased energy for the building functions regulated by this code, including appl…

FENESTRATION. Products classified as either vertical fenestration or skylights.VERTICAL FENESTRATION. Windows (fixed or operable), glazed doors, glazed block and combination opaque/glazed doors composed of glass or other transparent or translucent glazing materials and installed …

[Statutory Authority: RCW 19.27A.020, 19.27A.045 and chapters 19.27 and 34.05 RCW. WSR 13-04-055, § 51-11R-20207, filed 2/1/13, effective 7/1/13.]

HEATED SLAB-ON-GRADE FLOOR. Slab-on-grade floor construction in which the heating elements, hydronic tubing, or hot air distribution system is in contact with, or placed within or under, the slab.HIGH-EFFICACYLIGHT SOURCES. Compact fluorescent lamps, light emitting diode (LED) la…

INFILTRATION. The uncontrolled inward air leakage into a building caused by the pressure effects of wind or the effect of differences in the indoor and outdoor air density or both.INSULATED SIDING. A type of continuous insulation with manufacturer-installed insulating material as…

[Statutory Authority: RCW 19.27A.020, 19.27A.045 and chapters 19.27 and 34.05 RCW. WSR 13-04-055, § 51-11R-20210, filed 2/1/13, effective 7/1/13.]

[Statutory Authority: RCW 19.27A.020, 19.27A.045 and chapters 19.27 and 34.05 RCW. WSR 13-04-055, § 51-11R-20211, filed 2/1/13, effective 7/1/13.]

LABELED. Equipment, materials or products to which have been affixed a label, seal, symbol or other identifying mark of a nationally recognized testing laboratory, approved agency or other organization concerned with product evaluation that maintains periodic inspection of the pr…

manual. Capable of being operated by personal intervention (see "Automatic").[Statutory Authority: RCW 19.27A.020, 19.27A.045 and chapters 19.27 and 34.05 RCW. WSR 13-04-055, § 51-11R-20213, filed 2/1/13, effective 7/1/13.]

[Statutory Authority: RCW 19.27A.020, 19.27A.045 and chapters 19.27 and 34.05 RCW. WSR 13-04-055, § 51-11R-20214, filed 2/1/13, effective 7/1/13.]

OCCUPANT SENSOR CONTROL. An automatic control device that detects the presence or absence of people within an area and causes lighting, equipment, or appliances to be regulated accordingly.ON-SITE RENEWABLE ENERGY. Energy from renewable energy resources harvested at the building …

PILOT LIGHT, CONTINUOUSLY BURNING. A small gas flame used to ignite gas at a larger burning. Once lit, a continuous pilot light remains in operation until manually interrupted. Pilot light ignition systems with the ability to switch between intermittent and continuous mode are co…

[Statutory Authority: RCW 19.27A.020, 19.27A.045 and chapters 19.27 and 34.05 RCW. WSR 13-04-055, § 51-11R-20217, filed 2/1/13, effective 7/1/13.]

READY ACCESS (TO). That which enables a device, appliance, or equipment to be directly reached without requiring the removal or movement of any panel or similar obstruction.RENEWABLE ENERGY CERTIFICATE (REC). An instrument that represents the environmental attributes of one megaw…

SERVICE WATER HEATING. Supply of hot water for purposes other than comfort heating.SLAB-ON-GRADE FLOOR. That portion of a slab floor of the building envelope that is in contact with the ground and that is either above grade or is less than or equal to 24 inches below the final el…

THERMAL DISTRIBUTION EFFICIENCY (TDE). The resistance to changes in air heat as air is conveyed through a distance of air duct. TDE is a heat loss calculation evaluating the difference in the heat of the air between the air duct inlet and outlet caused by differences in temperatu…

U-FACTOR (THERMAL TRANSMITTANCE). The coefficient of heat transmission (air to air) through a building component or assembly, equal to the time rate of heat flow per unit area and unit temperature difference between the warm side and cold side air films (Btu/h • ft2 • °F) [W/(m2 …

VENTILATION. The natural or mechanical process of supplying conditioned or unconditioned air to, or removing such air from, any space.VENTILATION AIR. That portion of supply air that comes from outside (outdoors) plus any recirculated air that has been treated to maintain the des…

WHOLE HOUSE MECHANICAL VENTILATION SYSTEM. An exhaust system, supply system, or combination thereof that is designed to mechanically exchange indoor air with outdoor air when operating continuously or through a programmed intermittent schedule to satisfy the whole house ventilati…

ZONE. A space or group of spaces within a building with heating or cooling requirements that are sufficiently similar so that desired conditions can be maintained throughout using a single controlling device.[Statutory Authority: RCW 19.27A.020, 19.27A.045 and chapters 19.27 and …

[Statutory Authority: RCW 19.27A.020, 19.27A.045 and chapters 19.27 and 34.05 RCW. WSR 13-04-055, § 51-11R-30000, filed 2/1/13, effective 7/1/13.]Reviser's note: The brackets and enclosed material in the text of the above section occurred in the copy filed by the agency.

R301.1 General. Climate zones from Table R301.1 shall be used in determining the applicable requirements from Chapter 4. Locations not in Table R301.1 (outside the United States) shall be assigned a climate zone based on Section R301.3.R301.2 Warm humid counties. Warm humid count…

R302.1 Interior design conditions. The interior design temperatures used for heating and cooling load calculations shall be a maximum of 72°F (22°C) for heating and minimum of 75°F (24°C) for cooling.R302.2 Exterior design conditions. The heating or cooling outdoor design tempera…

[Statutory Authority: RCW 19.27A.020, 19.27A.045 and chapters 19.27 and 34.05 RCW. WSR 13-04-055, § 51-11R-30300, filed 2/1/13, effective 7/1/13.]