Rule 547f.
Sections N1106.1, N1106.2, N1106.3, N1106.3.1, N1106.4,
N1106.5, N1106.6, N1106.6.1, N1106.6.2, N1106.6.3, N1106.7, N1106.7.1,
N1106.7.2, N1106.7.3, and table N1106.4 of the code are added to read as
follows:
N1106.1 (R406.1). Scope.
This section establishes criteria for compliance using an energy rating index
(ERI) analysis.
N1106.2 (R406.2).
Mandatory requirements. Compliance with this section requires that the
mandatory provisions identified in sections N1101.2 and N1103.4.2 be met. The
building thermal envelope shall be greater than or equal to levels of
efficiency and solar heat gain coefficient in table 402.1.2 or 402.1.4 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.
N1106.3 (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%
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.
N1106.3.1 (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.
N1106.4 (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 N1106.4
when compared to the ERI reference design.
N1106.5 (R406.5). Verification by approved
agency. Verification of compliance with section N1106 shall be completed by an
approved third party.
N1106.6
(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 N1106.6.1 through N1106.6.3.
N1106.6.1 (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.
N1106.6.2
(R406.6.2). Compliance report. Compliance software tools shall generate a
report that documents that the ERI of the rated design complies with sections
N1106.3 and N1106.4. The compliance
documentation shall include all of 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.
N1106.6.3 (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.
N1106.7 (R406.7). Calculation software tools.
Calculation software, where used, shall be in accordance with sections
N1106.7.1 through N1106.7.3.
N1106.7.1
(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 N1106.3, 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 N1103.7.
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.
N1106.7.2 (R406.7.2). Specific approval.
Performance analysis tools meeting the applicable sections of section N1106
shall be approved. Tools are permitted to be approved based on meeting a
specified threshold for a jurisdiction. The code official shall approve tools
for a specified application or limited scope.
N1106.7 (R406.7.3). Input values. When
calculations require input values not specified by sections N1102, N1103,
N1104, and N1105, those input values shall be taken from an
approved source.
Table N1106.4 (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
|
