Michigan Administrative Code › Department - Licensing and Regulatory Affairs › Bureau of Construction Codes › Construction Code Commission General Rules › Construction Code › Part 10 - MICHIGAN UNIFORM ENERGY CODE › Section R. 408.31071a - Energy rating index compliance alternative

Current through Vol. 24-12, July 15, 2024
Rule 1071a. Sections R406.1, R406.2, R406.3, R406.3.1,
						R406.4, R406.5, R406.6,
R406.6.1, R406.6.2, R406.6.3, R406.7, R406.7.1, R406.7.2,
						R406.7.3, and table R406.4 of the code are added to read as follows:
R406.1. Scope. This section establishes criteria for
						compliance using an energy rating index (ERI) analysis.
R406.2. Mandatory requirements. Compliance with this
						section requires that the mandatory provisions identified in sections R401.2
						and R403.4.2 be met. The building thermal envelope shall be greater than or
						equal to levels of efficiency and solar heat gain coefficient in table R402.1.2
						or R402.1.4 of the 2009 international energy conservation code.
Exception: Supply and return ducts not completely inside
						the building thermal envelope shall be insulated to a minimum of R-6.
R406.3. Energy rating index. The energy rating index
						(ERI) shall be a numerical integer value that is based on a linear scale
						constructed such that the ERI reference design has an index value of 100 and a
						residential building that uses no net purchased energy has an index value of 0.
						Each integer value on the scale shall represent a 1 percent change in the total
						energy use of the rated design relative to the total energy use of the ERI
						reference design.
The ERI shall consider all energy used in the residential
						building.
R406.3.1. ERI reference design. The ERI reference design
						shall be configured such that it meets the minimum requirements of the 2006
						international energy conservation code prescriptive requirements.
The proposed residential building shall be shown to have
						an annual total normalized modified load less than or equal to the annual total
						loads of the ERI reference design.
R406.4. ERI-based compliance. Compliance based on an ERI
						analysis requires that the rated design be shown to have an ERI less than or
						equal to the appropriate value listed in table R406.4 when compared to the ERI
						reference design.
R406.5. Verification by approved agency. Verification of
						compliance with section R406 shall be completed by an approved third
						party.
R406.6. Documentation. Documentation of the software used
						to determine the ERI and the parameters for the residential building shall be
						in accordance with sections R406.6.1 through
R406.6.3.
R406.6.1. Compliance software tools. Documentation
						verifying that the methods and accuracy of the compliance software tools
						conform to the provisions of this section shall be provided to the code
						official.
R406.6.2. Compliance report. Compliance software tools
						shall generate a report that documents that the ERI of the rated design
						complies with sections R406.3 and R406.4. The compliance documentation shall
						include the following information:
1. Address or other identification of the residential
						building.
2. An inspection checklist documenting the building
						component characteristics of the rated design. The inspection checklist shall
						show results for both the ERI reference design and the rated design, and shall
						document all inputs entered by the user necessary to reproduce the
						results.
3. Name of individual completing the compliance
						report.
4. Name and version of the compliance software
						tool.
Exception: Multiple orientations. Where an otherwise
						identical building model is offered in multiple orientations, compliance for
						any orientation shall be permitted by documenting that the building meets the
						performance requirements in each of the 4 (north, east, south and west)
						cardinal orientations.
R406.6.3. Additional documentation. The code official may
						require the following documents:
1. Documentation of the building component
						characteristics of the ERI reference design.
2. A certification signed by the builder providing the
						building component characteristics of the rated design.
3. Documentation of the actual values used in the
						software calculations for the rated design.
R406.7. Calculation software tools. Calculation software,
						where used, shall be in accordance with sections R406.7.1 through R406.7.3.
						R406.7.1. Minimum capabilities. Calculation procedures used to comply with this
						section shall be software tools capable of calculating the ERI as described in
						section R406.3, and shall include the following capabilities:
1. Computer generation of the ERI reference design using
						only the input for the rated design.
The calculation procedure shall not allow the user to
						directly modify the building component characteristics of the ERI reference
						design.
2. Calculation of whole-building, as single zone, sizing
						for the heating and cooling equipment in the ERI reference design residence in
						accordance with section R403.7.
3. Calculations that account for the effects of indoor
						and outdoor temperatures and part-load ratios on the performance of heating,
						ventilating, and air-conditioning equipment based on climate and equipment
						sizing.
4. Printed code official inspection checklist listing
						each of the rated design component characteristics determined by the analysis
						to provide compliance, along with their respective performance ratings.
R406.7.2. Specific approval. Performance analysis tools
						meeting the applicable sections of section R406 shall be approved. Tools may be
						approved based on meeting a specified threshold for a jurisdiction. The code
						official shall approve tools for a specified application or limited
						scope.
R406.7.3. Input values. When calculations require input
						values not specified by sections R402, R403, R404, and R405, those input values
						shall be taken from an approved source.
Table R406.4 Maximum Energy Rating Index
Climate Zone
Energy Rating Index
1
52
2
52
3
51
4
54
5
55
6
54
7
53
8
53