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 Wisconsin Administrative Code (Last Updated: January 10, 2017)
 Agency SPS. Department of Safety and Professional Services
 Chapters 301-. Safety, Buildings, and Environment
 Chapters SPS361-366. Commercial Building Code
 Chapter SPS363. Energy Conservation
 SubChapter II. Changes, Additions or Omissions to the International Energy Conservation Code (IECC)

  Section 363.0503. Building mechanical systems.  

Latest version.
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    (1)   Calculation of heating and cooling loads. The following wording is a department requirement in addition to the requirements in IECC section 503.2.1: Design heating and cooling loads shall be determined in accordance with s. SPS 363.0302 and Table 363.0302.
    (2)   Equipment and system sizing. Substitute the following wording for the requirements and the exceptions in IECC section 503.2.2: Heating and cooling equipment and systems shall be sized to provide the minimum space and system loads calculated in accordance with s. SPS 363.0302 .
    (3)   Hvac system completion. The requirements in IECC sections 503.2.9 to 503.2.9.3 are not included as part of this chapter.
    (4)   Economizers Simple Hvac Systems. Substitute the following wording for the requirements in IECC section 503.3.1 the first paragraph and Table 503.3.1 (1): Supply air economizers shall be provided on the following cooling systems:
    (a) Package roof top units > 33,000Btu/h.
    (b) All other cooling systems > 54,000 Btu/h.
    (5)   Economizers Complex Hvac Systems. Substitute the following wording for the requirements, but not the exceptions, in IECC section 503.4.1: Supply air economizers shall be provided on cooling systems as described under sub. (4) . Economizers shall be capable of operating at 100 percent outside air, even if additional mechanical cooling is required to meet the cooling load of the building.
    (6)   Climate Zones 3 And 4. Substitute the following wording for the requirements in IECC section 503.4.3.3.2.2: For climate Zones 5 through 8 as indicated in Figure 301.1 and Table 301.1, if an open-circuit cooling tower is used, then a separate heat exchanger shall be required to isolate the cooling tower from the heat pump loop, and heat loss shall be controlled by shutting down the circulation pump on the cooling tower loop and providing an automatic valve to stop the flow of fluid.
CR 06-120 : cr. Register February 2008 No. 626 , eff. 3-1-08; correction made to (9) under s. 13.92 (4) (b) 7. , Stats., Register February 2008 No. 626 , eff. 3-1-08; CR 10-103 : r. (3) to (6), Table 503.2.3 (1), Table 503.2.3 (2), Table 63.0503, (8), (9), renum. (7) to be (3), cr. (4), (5), (6) Register August 2011 No. 668 , eff. 9-1-11; correction in (1), (2) made under s. 13.92 (4) (b) 7. , Stats., Register December 2011 No. 672 .