Section 367.12. Performance energy efficiency requirements.

 

(1)   General. The performance energy efficiency requirements specified in subs. (2) to (4) may be applied as alternative requirements to s. SPS 367.11 .

(2)   Space heating energy use. Buildings shall have an annual space heating energy use, in BTUs per square foot, per heating degree-day, which is no greater than the value shown in Table 367.12. The annual heating energy use shall be determined in accordance with sub. (3) or (4) . - See PDF for table

(3)   Calculation from fuel use data. The annual space heating energy use may be calculated from one year of representative fuel use data using department form, SBD-10647 or an equivalent method approved by the department prior to its use. The building area used in the calculation shall be the total gross floor area. The gross floor area is measured from the exterior faces of exterior walls or from the centerline of walls separating buildings, excluding covered walkways, open roofed-over areas, porches and similar spaces, pipe trenches, exterior terraces or steps, chimneys, roof overhangs, and similar features. The determination of annual space heating energy use per square foot shall be performed by or verified by an inspector.

(4)   Measurement of building performance. The annual space heating energy use may be determined in accordance with field measurement methods approved by the department prior to use. At a minimum, the method must be nationally recognized, meet a national standard, or be demonstrated to have equivalent accuracy.

History: CR 07-008 : cr. Register April 2008 No. 628 , eff. 5-1-08; correction in (1), (2) made under s. 13.92 (4) (b) 7. , Stats., Register December 2011 No. 672 .

Note

The department approves use of the Wisconsin Energy Bureau Home Energy Rating System for buildings of four dwelling units or less provided a blower door test is used to estimate the building infiltration. Information demonstrating the accuracy of other field measurement methods may be submitted to the department for review. Microsoft Windows NT 6.1.7601 Service Pack 1