DEPARTMENT OF LICENSING AND REGULATORY AFFAIRS
DIRECTOR’S OFFICE
CONSTRUCTION CODE
Filed with the secretary of state on
These rules become effective 120 days after filing with the secretary of state.
(By authority conferred on the director of
the department of licensing and regulatory affairs by section 4 of the
Stille-DeRossett-Hale single state construction code act, 1972 PA 230, MCL
125.1504, and Executive Reorganization Order Nos. 2003-1, and 2008-4,
and 2011-4, MCL 445.2011, 445.2025, and 445.2030)
R 408.31059, R 408.31060b, and R 408.31066
of the Michigan Administrative Code is are amended, and R
408.31060c, R 408.31060e, R 408.31061, R 408.31062, R 408.31063, R 408.31063a,
R 408.301064, R 408.31065, R 408.31069, R 408.31070, R408.31071, and R 408.31071a
of the Michigan Administrative Code are rescinded, as follows:
PART 10. MICHIGAN UNIFORM ENERGY CODE
R 408.31059 Applicable code.
Rule 1059. The residential
provisions of the international energy conservation code, 2015 2021
edition, including appendix RB except for sections R104.2 to R104.5,
R107.2 to R107.5, R301.2, R301.3, R402.3.2, and Table R303.1.3(3),
R109.1 to R109.4, and R110.1 to R110.4, appendix RA, and
appendix RC, govern
the energy efficiency for the design and construction of residential buildings, and, with exceptions
noted, the international energy conservation code is adopted by reference in
these rules. All
references to the international building code, international residential code,
international energy conservation code, international electrical code, international
existing building code, international mechanical code, and international
plumbing code mean the Michigan building code, Michigan residential code, Michigan
energy code, Michigan electrical code, Michigan rehabilitation code for
existing buildings, Michigan mechanical code, and Michigan plumbing code, respectively.
The Michigan energy code is available for inspection or purchase at the
Okemos office of the Michigan Department of Licensing and Regulatory Affairs,
Bureau of Construction Codes, 2501 Woodlake Circle, Okemos, 611 West
Ottawa Street, Lansing, Michigan 48933 48864, at a cost as of
the time of adoption of these rules of $52.00. or may be purchased from
the International Code Council, 500 New Jersey Avenue, N.W., 6th Floor,
Washington, D.C. 20001. The code may be purchased from the International
Code Council, through the bureau’s website at www.michigan.gov/bcc, at a cost as of
the time of adoption of these rules of $52.00.
R 408.31060bFeesPermits.
Rule 1060b. Section107.1R104.1 of the code is amended to read as follows:
107.1R104.1.Payment of feesPermits.The fees prescribed by the act shall be paid to the enforcing agency of the jurisdiction before a permit to begin work for new construction, alteration, removal, demolition, or other building operation may be issued. In addition, an amendment to a permit necessitating an additional fee shall not be approved until the additional fee has been paid.Any owner or owner’s authorized agent who intends to construct, enlarge, alter, repair, move, demolish or change the occupancy of a building or structure, or to erect, install, enlarge, alter, repair, remove, convert, or replace any electrical, gas, mechanical, plumbing or solar panel system, the installation of which is regulated by this code, or to cause any such work to be performed, shall first apply to the building official and obtain the required permit.
R 408.31060cBoard of appeals.Rescinded.
Rule 1060c. Section 109.1 and 109.3 of the code are amended to read as follows:
109.1 Means of appeal. (1) An interested person may appeal a decision of the enforcing agency to the board of appeals in accordance with the act. An application for appeal shall be based on both of the following:
(a) A claim that the true intent of the code or the rules governing construction have been incorrectly interpreted.
(b) The provisions of the code do not apply, or equal or better form of construction is proposed.
(2) The decision of a local board of appeals may be appealed to the construction code in accordance with the act and time frames.
Exceptions: Requests for barrier free design exception shall e in accordance with 1966 PA 1, MCL 125.1352 to 125.1356.
109.3 Qualifications. The board of appeals shall consist of members who are qualified in accordance with the act.
R 408.31060eClimate Zones.Rescinded.
Rule 1060e. Section 301.1 and Tables 301.1 and 301.3(2) of the code are amended and Figure 301.1a is added to the code to read as follows:
301.1 General. Climate zones from figures 301.1, 301.1a or table 301.1 shall be used in determining the applicable requirements of this code.
Editor's Note: An obvious error in R 408.31060e was corrected at the request of the promulgating agency, pursuant to Section 56 of 1969 PA 306, as amended by 2000 PA 262, MCL 24.256. The rule containing the error was published in Michigan Register, 2010 MR 21. The memorandum requesting the correction was published in Michigan Register, 2011 MR 5.
R 408.31061Certificate.Rescinded.
Rule 1061. Section 401.3 of the code is amended to read as follows:
401.3 Certificate. A permanent certificate shall be posted on or in the electrical distribution panel, and shall meet all of the following:
(a) Be affixed or attached so it does not cover or obstruct the visibility of the circuit directory label, service disconnect label, or other required labels.
(b) Be completed by the builder or registered design professional.
(c) List the predominant R-values of insulation installed in or on ceiling/roof, walls, foundation (slab, basement wall, crawlspace wall and/or floor) and ducts outside conditioned spaces and U-factors for fenestration. If there is more than 1 value for each component, then the certificate shall list the value covering the largest area.
(d) List the types and efficiencies of heating, cooling and service water heating equipment.
(e) If a gas-fired unvented room heater, electric furnace, or baseboard electric heater is installed in the residence, then the certificate shall list "gas-fired unvented room heater," as appropriate. An efficiency shall not be listed for gas-fired unvented room heaters, electric furnaces, or electric baseboard heaters.
R 408.31062Fenestration product rating.Rescinded.
Rule 1062. Section303.1.3 of the code is amended to read as follows:
303.1.3. Fenestration product rating. U-factors of fenestration products (windows, doors and skylights) shall be determined in accordance with NFRC 100 by an accredited, independent laboratory, and labeled and certified by the manufacturer. Products lacking such a labeled U-factor shall be assigned a default U-factor from Table 303.1.3(1) or 303.1.3(2).
Exception: Computer simulations by independent NFRC certified laboratories or approval under section 21 of 1972 PA 230, MCL 125.1521 are considered in compliance with this section.
R 408.31063 Insulation
and fenestration criteria. Rescinded.
Rule 1063. Insulation and fenestration
criteria. Table R402.1.1 of the code is amended to read as follows:
TABLE R 402.1.1
INSULATION AND
FENESTRATION REQUIREMENTS BY COMPONENTa
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a.
R-values are minimums. U-factors are maximums. When insulation is installed
in a cavity that is less than the label or design thickness of the insulation,
the installed R-value of the insulation shall not be less than the R-values
specified in the table.
b. The
fenestration U-factor column excludes skylights.
c.
“15/19” means R-15 continuous insulation on the interior or exterior of the
home or R-19 cavity insulation at the interior of the basement wall. “15/19”
may be met with R-13 cavity insulation on the interior of the basement wall
plus R-5 continuous insulation on the interior or exterior of the home. “10/13”
means R-10 continuous insulation on the interior or exterior of the home or R-13
cavity insulation at the interior of the basement wall.
d.
R-5 shall be added to the required slab edge R-values for heated slabs.
e.
Or insulation sufficient to fill the framing cavity, R-19 minimum.
f.
First value is cavity insulation, second is continuous insulation or insulated
siding, so “13 + 5” means R-13 cavity insulation plus R-5 continuous insulation
or insulated siding. If structural sheathing covers 40 % or less of the exterior,
continuous insulation R-value may be reduced by no more than R-3 in the
locations where structural sheathing is used – to maintain a consistent total
sheathing thickness.
g. The
second R-value applies when more than half the insulation is on the interior of
the mass wall.
R 408.31063a Specific
insulation requirements (prescriptive). Rescinded.
Rule 1063a Section R402.2.12 of the
code is amended to read as follows.
R402.2.12. Thermally isolated sunroom
insulation. The minimum ceiling insulation R-values shall be R-24 in zones 5
to 7. The minimum wall R-value shall be R-13 in all zones. New wall or walls
separating a sunroom from conditioned space shall meet the building thermal
envelope requirements.
R 408.301064Fenestration.Rescinded.
Rule 1064. Sections 402.3.3 and 402.3.6 of the code are amended to read as follows:
402.3.3 Glazed fenestration exemption. Up to 15 square feet (1.4m2) of glazed fenestration per dwelling unit shall be permitted to be exempt from U-factor requirements in section 402.1.1. This exemption shall not apply to the U-factor alternative approach in section 402.1.3 and the total UA alternative in section 402.1.4.
402.3.6. Replacement fenestration. Where some or all of an existing fenestration unit is replaced with new fenestration product, including sash and glazing, the replacement fenestration unit shall meet the applicable requirements for U-factor in table 402.1.1. Where some or all of an existing fenestration unit is replaced with a newfenestration product, including sash and glazing, the replacement fenestration unit shall meet the applicable requirements for U-factor in Table 402.1.1.
R 408.31065Equivalent U-Factors.Rescinded.
Rule
1065. Section R402.1.4 and table R402.1.3 of the code are amended to read as follows:
Table R402.1.3
Equivalent U-Factorsa
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a.
Nonfenestration U-factors shall be obtained from measurement, calculation, or
an approved source.
b.
When more than half the insulation is on the interior, the mass wall U-factors
shall be a maximum of 0.065 in zone 5 and marine 4, and 0.057 in zones 6 and 7.
R402.1.4 Total
UA alternative. If the total building thermal envelope UA (sum of U-factor
times assembly area) is less than or equal to the total UA resulting from using
the U-factors in Table R402.1.3 (multiplied by the same assembly area as in the
proposed building), the building shall be considered in compliance with Table
R402.1.1. The UA calculation shall be done using a method consistent with the
ASHRAE Handbook of Fundamentals and shall include the thermal bridging effects
of framing materials.
R 408.31066 Systems.
Rule 1066. Sections
R403.2.1 R403.3.4, R403.2.2 R403.3.5, and R403.4 R403.3.7, and R403.4.2 of the code are
amended to read as follows:
R403.2.1 R403.3.4. Insulation
(prescriptive)Sealing. All portions
of the air distribution system shall be installed in accordance with section M1601
and be insulated to an installed R-6 when system components are located within
the building but outside the conditioned space, and R-8 when located outside to
the building. When located within a building envelope assembly, at least R-8 shall
be applied between the duct and that portion of the assembly farthest from
conditioned space.
Exception: Portions
of the air distribution system within appliances or equipment.Ducts, air
handlers and filter boxes shall be sealed. Joints and seams shall comply with
either the international mechanical code or international residential code, as applicable.
Exceptions:
1. For ducts having a static pressure classification of less than 2 inches of water column (500 Pa), sealing shall not be required where the ducts are located entirely within the condition space it is serving.
R403.2.2 R403.3.5. Sealing
(mandatory)Duct
testing.
Ducts, air handlers, and filter boxes shall be sealed. Joints and seams shall
comply with either the international mechanical code or international residential
code, as applicable.
Exceptions:
1.
Air-impermeable spray foam products may be applied without additional joint
seals.
2. Where a duct
connection is made that is partially inaccessible, 3 screws or rivets shall be
equally spaced on the exposed portion of the joint so as to prevent a hinge
effect.
3. Continuously
welded and locking-type longitudinal joints and seams in ducts operating at
static pressures less than 2 inches of water column (500 Pa) pressure classification
shall not require additional closure systems.
Duct tightness
shall be verified by either of the following:
1. Post
construction test: Total leakage to the outside of a conditioned space or
total leakage shall be less than or equal to 4 cfm (113.3 L/min) per 100 square
feet (9.29 m2) of conditioned floor area when tested at a pressure
differential of 0.1 inches w. g. (25 Pa) across the entire system, including
the manufacturer’s air handler enclosure. All register boots shall be taped or
otherwise sealed during the test.
2. Rough-in test:
Total leakage shall be less than or equal to 4 cfm (113.3 L/min) per 100 square
feet (9.29 m2) of conditioned floor area when tested at a pressure differential
of 0.1 inches w.g. (25 Pa) across the system, including the manufacturer’s air
handler enclosure. All registers shall be taped or otherwise sealed during the
test. If the air handler is not installed at the time of the test, total
leakage shall be less than or equal to 3 cfm (85 L/min) per 100 square feet (9.29
m2) of conditioned floor area.
Exception: The total leakage test is
not required for ducts and air handlers located entirely within the building
thermal envelope.
The duct shall be pressure tested in accordance with ANSI/RESNET/ICC 380 or ASTM
E1554 to determine air leakage by 1 of the following methods:
1. Rough-in test: Total leakage shall be measured with a pressure differential of 0.1-inch w.g. (25 Pa) across the system, including the manufacturer’s air handler enclosure if installed at the time of the test. Registers shall be taped or otherwise sealed during the test.
2. Postconstruction test: Total leakage shall be measured with a pressure differential of 0.1-inch w.g. (25 Pa) across the entire system, including the manufacture’s air handler enclosure. Registers shall be taped or otherwise sealed during the test.
Exception:
1. A duct air-leakage test shall not be required for ducts serving ventilation systems that are not integrated with ducts serving heating or cooling systems.
2. A duct air-leakage test shall not be required for ducts located in the conditioned space.
R403.4.1R403.3.7. Circulating
hot water systems (mandatory)Building cavities. All
circulating service hot water piping shall be insulated to at least R-2. Circulating
hot water systems shall include an automatic or readily accessible manual
switch that can turn off the hot water circulating pump when the system is not
in use.
Exceptions:
1. Factory-installed
piping within HVAC equipment tested and rated in accordance with a test
procedure referenced by this code.
2. Runout
piping not exceeding 4 feet (1 219 mm) in length and 1 inch (25 mm) in diameter
between the control valve and HVAC coil. Building framing cavities not located
within the conditioned space shall not be used as ducts or plenums.
R403.4.2. Hot
water pipe insulation (prescriptive). Insulation for hot water pipe with a
minimum thermal resistance (R-value) of R-3 shall be applied to the following:
1. Piping larger
than 3/4 inch (19.05 mm) nominal diameter.
2. Piping
serving more than 1 dwelling unit.
3. Piping
located outside the conditioned space.
4. Piping from
the water heater to a distribution manifold.
5. Piping
located under a floor slab.
6. Buried
piping.
7. Supply and
return piping in recirculation systems other than demand recirculation systems.
R 408.31069 Air
leakage. Rescinded.
Rule 1069. Sections R402.4, R402.4.1, R402.4.1.1,
R402.4.1.2, R402.4.2, R402.4.3, R402.4.4, and Table R402.4.1.1 of the code are
amended to read as follows:
R402.4 Air leakage. The building thermal
envelope shall be constructed to limit air leakage in accordance with the requirements
of Sections R402.4.1 through R402.4.4.
R402.4.1. Building
thermal envelope. The building thermal envelope shall comply with Sections
R402.4.1.1 and R402.4.1.2.
R402.4.1.1. Installation
(mandatory). The components of the building thermal envelope as listed in
Table R402.4.1.1 shall be installed in accordance with the manufacturer’s instructions
and the criteria listed in Table R402.4.1.1, as applicable to the method of
construction. The sealing methods between dissimilar materials shall allow for
differential expansion and contraction.
R402.4.1.2. Testing
(prescriptive). The building or dwelling unit shall be tested and verified as
having an air leakage rate of not exceeding 4 air changes per hour. Testing
shall be conducted with a blower door at a pressure of 0.2 inches (5.08 mm)
w.g. (50 pascals). Where required by the code official, testing shall be conducted
by a certified independent third party. Certification programs shall be
approved by the state construction code commission. A written report of the
results of the test shall be signed by the party conducting the test and provided
to the code official. Testing shall be performed at any time after creation of
all penetrations of the building thermal envelope.
All of the following
apply during testing:
1. Exterior windows,
doors, and fireplace and stove doors shall be closed, but not sealed, beyond
the intended weatherstripping or other infiltration control measures.
2. Dampers
including exhaust, intake, makeup air, backdraft, and flue dampers shall be
closed, but not sealed beyond intended infiltration control measures.
3. Interior
doors, installed at the time of the test, shall be open.
4. Exterior
doors for continuous ventilation systems and heat recovery ventilators shall be
closed and sealed.
5. Heating and
cooling systems, if installed at the time of the test, shall be turned off.
6. Supply and return
registers, if installed at the time of the test, shall be fully open.
R402.4.2. Fireplaces
(mandatory). New wood-burning masonry fireplaces shall have tight-fitting flue
dampers and outdoor combustion air.
R402.4.3. Fenestration
air leakage (mandatory). Windows, skylights, and sliding glass doors shall
have an air infiltration rate of no more than 0.3 cfm per square foot (1.5
L/s/m2), and swinging doors no more than 0.5 cfm per square foot (2.6
L/s/m2), when tested according to NFRC 400 or AAMA/WDMA/CSA
101/I.S.2/A440 by an accredited, independent laboratory and listed and labeled
by the manufacturer.
Exception: Site-built
windows, skylights, and doors.
R402.4.4. Recessed lighting (mandatory).
Recessed luminaires installed in the building thermal envelope shall be sealed
to limit air leakage between conditioned and unconditioned spaces. All recessed
luminaires shall be IC-rated and labeled as having an air leakage rate not more
than 2.0 cfm (0.944 L/s) when tested in accordance with ASTM E 283 at a 1.57
psf (75 Pa) pressure differential. All recessed luminaires shall be sealed
with a gasket or caulk between the housing and the interior wall or ceiling covering.
TABLE R402.4.1.1
AIR BARRIER AND INSULATION
INSTALLATION
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a. In addition, inspection of log walls
shall be in accordance with the provisions of ICC-400.
R 408.31070 Steel-frame
ceilings, walls, and floors. Rescinded.
Rule 1070. Section R402.2.6 of the code
are amended to read as follows:
R402.2.6. Steel-frame ceilings, walls, and
floors. Steel-frame ceilings, walls, and floors shall meet the insulation
requirements of table R402.2.6 or shall meet the U-factor requirements in table
R402.1.3. The calculation of the U-factor for a steel-frame envelope assembly
shall use a series-parallel path calculation method.
R408.31071
Simulated performance alternative. Rescinded.
Rule 1071. Table R405.5.2(1) of the code is amended to read as follows:
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For
SI: 1 square foot = 0.93 m2, 1 British thermal unit = 1055 J, 1 pound
per square foot = 4.88 kg/m2, 1 gallon (U.S.) = 3.785 L, ◦C
= (◦F-3)/1.8, 1 degree = 0.79 rad, 1 inch water gauge = 1250
Pa.
a.
Glazing shall be defined as sunlight-transmitting fenestration, including the area
of sash, curbing, or other framing elements, that enclose conditioned space.
Glazing includes the area of sunlight-transmitting fenestration assemblies in walls
bounding conditioned basements. For doors where the sunlight-transmitting
opening is less than 50 % of the door area, the glazing area is the sunlight
transmitting opening area. For all other doors, the glazing area is the rough
frame opening area for the door including the door and the frame.
b.
For residences with conditioned basements, R-2 and R-4 residences and townhouses,
the following formula shall be used to determine glazing area:
AF
= As x FA x F
where:
AF
= Total glazing area.
As
= Standard reference design total glazing area.
FA
= (Above-grade thermal boundary gross wall area)/(above-grade boundary wall
area + 0.5 x below-grade boundary wall area).
F =
(Above-grade thermal boundary wall area)/(above-grade thermal boundary wall
area + common wall area) or 0.56, whichever is greater.
and
where:
Thermal
boundary wall is any wall that separates conditioned space from unconditioned
space or ambient conditions.
Above-grade
thermal boundary wall is any thermal boundary wall component not in contact
with soil.
Below-grade
boundary wall is any thermal boundary wall in soil contact.
Common
wall area is the area of walls shared with an adjoining dwelling unit.
L
and CFA are in the same units.
c.
Where required by the code official, testing shall be conducted by a certified
independent third party. Hourly calculations as specified in the ASHRAE
handbook of fundamentals, or the equivalent, shall be used to determine the
energy loads resulting from infiltration.
d.
The combined air exchange rate for infiltration and mechanical ventilation
shall be determined in accordance with Equation 43 of 2001 ASHRAE handbook of
fundamentals, page 26.24 and the “whole-house ventilation” provisions of 2001
ASHRAE handbook of fundamentals, page 26.19 for intermittent mechanical
ventilation.
e.
Thermal storage element shall mean a component not part of the floors, walls,
or ceilings that is part of a passive solar system, and that provides thermal
storage, such as enclosed water columns, rock beds, or phase-change containers.
A thermal storage element must be in the same room as fenestration that faces within
15 degrees (0.26 rad) of true south, or must be connected to such a room with
pipes or ducts that allow the element to be actively charged.
f.
For a proposed design with multiple heating, cooling, or water heating systems
using different fuel types, the applicable standard reference design system capacities
and fuel types shall be weighted in accordance with their respective loads as
calculated by accepted engineering practice for each equipment and fuel type
present.
g.
For a proposed design without a proposed heating system, a heating system with
the prevailing federal minimum efficiency shall be assumed for both the
standard reference design and proposed design.
h.
For a proposed design home without a proposed cooling system, an electric air
conditioner with the prevailing federal minimum efficiency shall be assumed for
both the standard reference design and the proposed design.
i. For
a proposed design with a non-storage-type water heater, a 40-gallon
storage-type water heater with the prevailing federal minimum energy factor for
the same fuel as the predominant heating fuel type shall be assumed. For the
case of a proposed design without a proposed water heater, a 40-gallon
storage-type water heater with the prevailing federal minimum efficiency for the
same fuel as the predominant heating fuel type shall be assumed for both the
proposed design and standard reference design.
R 408.31071a.
Energy rating index compliance alternative. Rescinded.
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
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