(Effective Until July 1, 2010.)
WAC 51-11-1008   Section 1008 Air infiltration.

     1008.1 General: Tables 10-8 and 10-8A list effective air change rates and heat capacities for heat loss due to infiltration for Group R Occupancy.

     Estimated seasonal average infiltration rate in air changes per hour (ACH) is given for standard air-leakage control (see section 502.4 of this code for air leakage requirements for Group R Occupancy). The effective air-change rate shall be used in calculations for compliance under either the Component Performance or Systems Analysis approaches.

     Heat loss due to infiltration shall be computed using the following equation:

Q_infil = ACH_eff* HCP
where:	Q_infil	=	Heat loss due to air infiltration
	ACH_eff	=	the effective air infiltration rate in Table 10-8
	HCP	=	the Heat Capacity Density Product for the appropriate elevation or climate zone as given below.

TABLE 10-8

ASSUMED EFFECTIVE AIR CHANGES

PER HOUR

Air-Leakage	Air Changes per Hour
Control Package	Natural Effective
Standard	0.35 0.35

TABLE 10-8A

DEFAULT HEAT CAPACITY/DENSITY PRODUCT FOR AIR

Zone	Average Elevation	Heat Capacity/Density
1	Mean Sea Level	0.0180 Btu/h•°F
2	2000	0.0168 Btu/h•°F
3	3000	0.0162 Btu/h•°F

[Statutory Authority: RCW 19.27A.025, 19.27A.045. 01-03-010, § 51-11-1008, filed 1/5/01, effective 7/1/01; 98-03-003, § 51-11-1008, filed 1/8/98, effective 7/1/98. Statutory Authority: RCW 19.27A.020 and 1990 c 2. 91-01-112, § 51-11-1008, filed 12/19/90, effective 7/1/91.]

(Effective July 1, 2010.)
WAC 51-11-1008   Section 1008 Air infiltration.

     1008.1 General: Tables 10-8 and 10-8A list effective air change rates and heat capacities for heat loss due to infiltration for single-family residential.

     Estimated seasonal average infiltration rate in air changes per hour (ACH) is given for standard air-leakage control (see section 502.4 of this code for air leakage requirements for single-family residential). The effective air-change rate shall be used in calculations for compliance under either the Component Performance or Systems Analysis approaches.

     Heat loss due to infiltration shall be computed using the following equation:

Q_infil = ACH_eff* HCP
where:	Q_infil	=	Heat loss due to air infiltration
	ACH_eff	=	the effective air infiltration rate in Table 10-8
	HCP	=	the Heat Capacity Density Product for the appropriate elevation or climate zone as given below.

TABLE 10-8

ASSUMED EFFECTIVE AIR CHANGES

PER HOUR

Air-Leakage	Air Changes per Hour
Control Package	Natural Effective
Standard	0.35 0.35

TABLE 10-8A

DEFAULT HEAT CAPACITY/DENSITY PRODUCT FOR AIR

Zone	Average Elevation	Heat Capacity/Density
1	Mean Sea Level	0.0180 Btu/h•°F
2	2000	0.0168 Btu/h•°F
3	3000	0.0162 Btu/h•°F

[Statutory Authority: RCW 19.27A.025, 19.27A.045. 10-03-115, § 51-11-1008, filed 1/20/10, effective 7/1/10; 01-03-010, § 51-11-1008, filed 1/5/01, effective 7/1/01; 98-03-003, § 51-11-1008, filed 1/8/98, effective 7/1/98. Statutory Authority: RCW 19.27A.020 and 1990 c 2. 91-01-112, § 51-11-1008, filed 12/19/90, effective 7/1/91.]

NOTES:

     Reviser's note:  Notice of Objection: The Joint Administrative Rules Review Committee (Committee) finds that, in adopting the 2009 proposed changes to the State Energy Code, Chapter 51-11 WAC, on November 20, 2009, the State Building Code Council (Council) failed to comply with all requirements of the law and failed to adequately respond to the Committee's request for additional economic impact and cost-benefit analyses prior to adoption.

     On October 1, 2009, the Committee found that the Small Business Economic Impact Statement (SBEIS) for the proposed changes filed with the Code Reviser failed to comply with all requirements of law. The Committee requested that the Council conduct a cost-benefit analysis pursuant to RCW 34.05.328 and amend the SBEIS to provide additional economic impact information, including an estimate of the number of jobs that would be created or lost as a result of compliance with all the proposed rules, as required by RCW 19.85.040 (2)(d).

     The Council provided the Committee with information and data on November 18, 2009. On December 2, 2009, the Committee found that the Council failed to adequately respond to the Committee's request for additional data. Specifically, the Committee found that the Council failed to amend the SBEIS to (a) estimate the number of jobs that would be created or lost as a result of compliance with the proposed changes; and (b) support the SBEIS with a detailed and rigorous costs analysis of the cumulative impact of all the changes. In addition, the Committee found that the Council failed to provide the Committee with a cost-benefit analysis of the proposed changes and pursuant to the requirements of RCW 34.05.328.

     The Committee strongly supports a process that makes thoughtful and informed progress towards changes that result in improved energy efficiency in our buildings, wherever practicable. While the Council worked diligently, it is the opinion of the Committee that the Council did not fully develop and consider the economic impacts and costs versus benefits of these significant changes to our Energy Code. Furthermore, it is the opinion of the Committee that the Council and the Legislature need this information to fully evaluate the value, impacts, and consequences of the proposed codes, with due diligence to their respective fiduciary responsibilities, in order to create the best informed public policy.

     As a result, the Committee recommends that the Governor suspend the adoption and implementation of the changes to the Energy Code, Chapter 51-11 WAC, adopted by the Council on November 20, 2009, until such time as a more adequate analysis has been completed and considered by the appropriate bodies.

     For all of the above stated reasons, the Committee objects to the changes to the State Energy Code, Chapter 51-11 WAC, that were adopted by the Council on November 20, 2009, and hereby directs the Code Reviser, pursuant to RCW 34.05.640(4), to publish this Notice of Objection in the Washington State Register and along with any publication in the Washington Administrative Code of changes to Chapter 51-11 WAC that were adopted by the Council in 2009 and filed with the Code Reviser.