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2012 NC Energy Conservation Code

(2012 NCECC)Commercial Building

Compliance

Billy Hinton, PE

NC Department of Insurance

Engineering Division

Code Services Section

Objectives

Today we will address:

1. Compliance options for “Commercial Buildings”

2. Recent legislation & it’s impact on the 2012 NCECC

3. Resources available to aid code compliance

4. Broad overview of our future energy conservation code

(2018 NCECC)

5. Impact of current legislation on our future 2018 NCECC

Question

What is a “Commercial Building” and a

“Residential Building” with respect to the 2012 NC

Energy Conservation Code?

Commercial & Residential Building

“Commercial Buildings” are defined in Chapter 2 of the

2012 NCECC as “All Buildings not included in the

definition of “Residential Buildings.”

“Residential Buildings” are defined in Chapter 2 of the

2012 NCECC as “R-3 buildings, as well as R-2 and R-4

buildings three stories or less in height above grade.

These definitions are unique to the 2012 NCECC.

Residential Building Example

Three story apartment building – R-2 – This is a

“Residential Building” – Chapter 4 of the 2012 NCECC

applies.

Commercial Building Example

Four story apartment building – R-2 – This is a

“Commercial Building” – Chapter 5 of the 2012 NCECC

applies.

Commercial Building Example

Four story building - First story Mercantile, stories 2,3,and

4 apartments – This is a “Commercial Building”–Chapter 5

of the 2012 NCECC applies.

Commercial & Residential Building Example

Three story building - First story Mercantile, stories 2 and 3

apartments – This is a mix of Commercial Building

requirements and Residential Building requirements -

Commercial Building requirements (Chapter 5) for Floor 1

and Residential Building requirements (Chapter 4) for

floors 2 & 3.

Question

For “Commercial Buildings”, what are the

compliance path options available for compliance

with the 2012 NC Energy Conservation Code?

Commercial Building Compliance Options

1. 2012 NCECC, Chapter 5

2. “COMcheck” for the 2012 NCECC

3. ASHRAE Standard 90.1-2010

4. “COMcheck” for ASHRAE Standard 90.1-2010

5. 2015 NC Existing Building Code

6. House Bill 201 (for certain existing commercial

building alterations and additions)

7. Senate Bill 131 (once rules are approved-for

certain new and existing buildings-expected early

2018)


1. 2012 NCECC, Chapter 5

A compliance path integral to Chapter 5.

1. Prescriptive (Tables and mandatory provisions)

2. Performance (Mandatory provisions and building

energy use simulation modeling)


2. “COMcheck” for the 2012 NCECC

A free USDOE developed computer program for

demonstrating compliance with energy conservation codes

– Includes the 2012 NCECC as a code selection.

Download from:

https://www.energycodes.gov/comcheck

The opening COMcheck screen showing the NC Code

selection is displayed on the next slide.


COMcheck Compliance Software


3. ASHRAE Standard 90.1-2010

Compliance options in ASHRAE Standard 90.1

1. Prescriptive (Use of Tables and mandatory

requirements)

2. Performance (Building energy simulation modeling and

mandatory requirements – Chapter 11 Energy Cost

Budget Method)


4. “COMcheck” for ASHRAE Standard 90.1-2010

A free USDOE developed computer program for

demonstrating compliance with energy conservation codes –

Includes ASHRAE 90.1-2010 as a code selection. Download

from:


The COMcheck opening screen showing the ASHRAE 90.1-

2010 code selection is displayed on the next slide.


COMcheck Compliance Software



Generally, the 2015 NC Existing Building Code will refer to

the 2012 NC Energy Conservation Code for requirements

except for a special provision addressing conversion of

unconditioned space to conditioned space.



908.1.1 Unconditioned to conditioned space. In addition

to the requirement of section 908.1, projects changing

unconditioned space to conditioned space and costing

more than $10,000 shall require 10 per cent of the project

cost be used toward meeting the requirements of Chapter

11 of the NC Residential Code for one- and two-family

dwellings and townhouses or the NC Energy Conservation

Code.



Project cost for the purposes of this section is the total

project cost listed on all permits related to the work

required to convert the unconditioned space to conditioned

space and excludes the 10% added by this section.



Under this section, existing building envelope components

that become a part of the building thermal envelope and

are not changed are not required to be upgraded.



The additional 10% of the project cost shall be

appropriated for additional energy conservation features of

choice that are addressed in Chapter 11 of the NC

Residential Code for one- and two-family dwellings and

townhouses or the NC Energy Conservation Code.



In addition to the 10% project cost, any existing ceiling,

wall, or floor cavities becoming a part of the building

thermal envelope that are exposed during construction

shall at a minimum be insulated to comply with Chapter 11

of the NC Residential Code for one- and two-family

dwellings and townhouses or the NC Energy Conservation

Code or be insulated to fill the cavity, whichever is less.


6. House Bill 201 (Session Law 2014-90)

Allows alterations to certain existing buildings and/or

additions to certain existing buildings that are identified

within the scoping provisions of the bill to meet the

requirements of the 2009 NC Energy Conservation Code.


House Bill 201

Building Reutilization for Economic Development Act

PART I. Applicability of the Energy

Conservation Code to Certain Existing

Nonresidential Buildings


SECTION 1. G.S. 143-138 is amended by adding a new

subsection to read:

"(b15) Exclusion from Energy Code Requirements for

Existing Commercial Buildings. – The alteration of

commercial buildings and structures that received a

certificate of occupancy prior to January 1, 2012, may be

subject to the rules pertaining to energy efficiency and

energy conservation that were in effect on December 31,

2011.


The addition to commercial buildings and structures that

received a certificate of occupancy prior to January 1,

2012, may be subject to the rules pertaining to energy

efficiency and energy conservation that were in effect on

December 31, 2011, so long as the addition does not

increase the building area of the existing commercial

building or structure to more than one hundred fifty percent

(150%) of the building area of the commercial building or

structure as it was in existence on December 31, 2011.


For the purpose of this subsection, the term "commercial

buildings and structures" shall include all structures and

buildings that are not classified as a Group R occupancy

by the Building Code Council."


7. Senate Bill 131 (Session Law 2017-10)

New legislation which instructs the North Carolina Building

Code Council (NCBCC) to provide an exemption from

energy conservation requirements for certain occupancy

classifications in the 2012 NC State Building Code and all

future NC State Building Codes.


Senate Bill 131

AN ACT TO PROVIDE FURTHER REGULATORY RELIEF

TO THE CITIZENS OF NORTH CAROLINA

PART I. BUSINESS REGULATION

….

EXEMPT CERTAIN BUILDING CODE CLASSIFICATIONS

FROM ENERGY EFFICIENCY STANDARDS


SECTION 1.4 G.S. 143-138 is amended by adding a new

subsection to read:

(b18) Exclusion from Energy Efficiency Code

Requirements For Certain Use and Occupancy

Classifications.


“The Council shall provide for an exemption from any

requirements in the energy efficiency standards pursuant

to Chapter 13 of the 2012 NC Building Code and the 2012

Energy Conservation Code, and any subsequent

amendments to the Building Code and the Energy

Conservation Code, for the following use and occupancy

classifications pursuant to Chapter 3 of the 2012 NC

Building Code: Section 306, Factory Group F; Section 311,

Storage Group S; and Section 312, Utility and

Miscellaneous Group U. This exclusion shall apply to the

entire floor area of any structure for which the primary use

or occupancy is listed herein.”


Then, according to the language of the bill, in addition to

the building areas directly associated with occupancy

classifications for Section 306, Factory Group F; Section

311, Storage Group S; and Section 312, Utility and

Miscellaneous Group U, any other building areas including

office/administration areas are also exempt if the primary

use of the building is any of the occupancies listed above.

Then any energy conservation provisions included in the

design would be voluntary and not required by the code.

Inspectors would inspect for compliance with the

engineered drawings and specifications.


Energy Conservation features included in the design would

be at the discretion of the designer and owner and

provided based on an acceptable rate of return determined

appropriate by the owner applicable to his specific project

and business needs and objectives.

The scope of the bill applies to new buildings and also to

repairs, alterations, and additions to existing buildings

included within the scoping provisions of the bill.


The NC Building Code Council is moving forward

proposed rule changes in accordance with the directive

from the NC General Assembly Senate Bill 131.

An effective date of early 2018 is anticipated given no

substantive changes occur to the proposed rules during

the rulemaking process and the rules receive final

approval by the Rules Review Commission and no

objections are received from the legislature.

Question

Where can I find helpful information to aid with

determination of U-factors for common building

assemblies?

ASHRAE 90.1-2010

ASHRAE Normative Appendix A

The Normative Appendix A will be very useful to designers

that desire to design an assembly different from the

solution given by the R-value table.

The Normative Appendix A provides pre-calculated U-

factors for all opaque building assembly classifications

considering different combinations of insulation products.

ASHRAE 90.1-2010

ASHRAE Normative Appendix A

We will look at an example of use of Appendix A for Metal

Building Roof insulation design.

ASHRAE 90.1-2010ASHRAE Normative Appendix A

Table A2.3 (continued)

Question

Where can I find information concerning the NC

Building Code Council meetings, meeting minutes,

and meeting agendas?

NC DOI Web Site Resources

Question

Where can I find approved amendments for the

2012 NC Energy Conservation Code?

Question

Can approved code amendments be used before

their assigned effective date?

Code Amendments

A code amendment may be used as an approved alternate

design method upon request before the assigned effective

date once the amendment has been adopted by the NC

Building Code Council and has been approved by the

Rules Review Commission.

On and after the code amendment effective date, the code

amendment must be used.

Question

Where can I find approved interpretations for the

2012 NC Energy Conservation Code?

Question

When is the next edition of the NC Energy

Conservation code anticipated to be adopted and

what model code will it be based upon?

Future Code Adoptions

The NCECC has been placed on a six year code cycle

with the other volumes of the 2012 NC State Building Code

which deviates from the customary three year cycle of the

past.

The next edition of the NC Energy Conservation Code is

the 2018 Edition modeled on the 2015 Edition of the ICC

IECC model code and is planned to have an effective date

of January 1, 2019.

Question

What edition of ASHRAE 90.1 will be included as

a compliance option in the 2018 NCECC?

ASHRAE 90.1-2013

The 2018 edition of the NCECC includes ASHRAE 90.1-

2013 as an optional compliance path for commercial

buildings.

USDOE offers a COMcheck for ASHRAE 90.1-2013. This

program may be used to demonstrate compliance with the

2018 NCECC for compliance with ASHRAE 90.1-2013

compliance option.

Question

Will the new 2018 NCECC impact application of

House Bill 201 with respect to energy

conservation code requirements contained in the

legislation?

House Bill 201

No, adoption of a new energy conservation code will have

no impact to House Bill 201. The provisions of House Bill

201 will remain in effect for the current energy

conservation code and all future codes until new legislation

revises the general statute.

Question

How does Senate Bill 131 impact application of

the 2018 NCECC with respect to energy

conservation code requirements?

Senate Bill 131

The NC Building Code Council is moving forward

proposed rule changes to the 2018 NCECC in accordance

with the provisions of the bill. The provisions of Senate Bill

131 will remain in effect for the 2012 NCECC and the 2018

NCECC and all future codes until such time new legislation

revises the general statute.

Note that this legislation affects code requirements by

requiring the NCBCC to perform certain code amendments

as directed by the statute.

Questions?

Thank you.

I can be reached:

Phone: 919 647 0008

Email: [email protected]

Our NCDOI OSFM Engineering Website:

http://www.ncdoi.com/OSFM/Engineering_and_Codes.aspx

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https://www.facebook.com/NCOSFMEngineering/

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