TITLE 14             HOUSING AND CONSTRUCTION

CHAPTER 7        BUILDING CODES GENERAL

PART 6                 2018 NEW MEXICO RESIDENTIAL ENERGY CONSERVATION CODE

 

14.7.6.1                 ISSUING AGENCY:  Construction Industries Division (CID) of the Regulation and Licensing Department.

[14.7.6.1 NMAC - Rp, 14.7.6.1 NMAC, 9/25/2020]

 

14.7.6.2                 SCOPE:  This rule applies to all residential contracting work performed in New Mexico on or after September 25, 2020, that is subject to the jurisdiction of CID, unless performed pursuant to a permit for which an application was received by CID before that date.

[14.7.6.2 NMAC - Rp, 14.7.6.2 NMAC, 9/25/2020]

 

14.7.6.3                 STATUTORY AUTHORITY:  Sections 60-13-9 and 60-13-44 NMSA 1978.

[14.7.6.3 NMAC - Rp, 14.7.6.3 NMAC, 9/25/2020]

 

14.7.6.4                 DURATION: Permanent.

[14.7.6.4 NMAC - Rp, 14.7.6.4 NMAC, 9/25/2020]

 

14.7.6.5                 EFFECTIVE DATE:  September 25, 2020 unless a later date is cited at the end of a section.

[14.7.6.5 NMAC - Rp, 14.7.6.5 NMAC, 9/25/2020]

[From the date of publication of this rule in the New Mexico register, until month 3/2021, permits may be issued under either the previously-adopted rule, or this rule.  After month 3/2021, permits may be issued only under this rule.]

 

14.7.6.6                 OBJECTIVE:  The purpose of this rule is to establish minimum standards for energy conservation for residential construction in New Mexico.

[14.7.6.6 NMAC - Rp, 14.7.6.6 NMAC, 9/25/2020]

 

14.7.6.7                 DEFINITIONS:  See 14.5.1 NMAC, General Provisions and Chapter 2 of the IECC as amended in 14.7.6.10 NMAC.

[14.7.6.7 NMAC - Rp, 14.7.6.7 NMAC, 9/25/2020]

 

14.7.6.8                 ADOPTION OF THE 2018 NEW MEXICO RESIDENTIAL ENERGY CONSERVATION CODE:

                A.            This rule adopts by reference the 2018 international energy conservation code (IECC), as amended by this rule.

                B.            In this rule, each provision is numbered to correspond with the numbering of the 2018 international residential energy conservation code.

                C.            This rule is to be applied to each of the following New Mexico building codes, including the NMRBC, NMPC, NMMC and the NMEC.

[14.7.6.8 NMAC - Rp, 14.7.6.8 NMAC, 9/25/2020;

 

14.7.6.9                 CHAPTER 1 - ADMINISTRATION:

                A.            Section R101 - General.

                                (1)           R101.1 Title.  Delete this section of the IECC and substitute: this rule shall be known as 14.7.6 NMAC, the 2018 New Mexico Residential Energy Conservation Code (NMRECC).

                                (2)           R101.2 Scope.  Delete this section of the IECC and see 14.7.6.2 NMAC, Scope.

                                (3)           R101.3 Intent.  Delete this section of the IECC and see 14.7.6.6 NMAC, Objective.

                                (4)           R101.5.1 Compliance materials.  Delete this section of the IECC and substitute the following:  the code official shall be permitted to approve specific computer software, worksheets, compliance manuals and other similar materials that meet the intent of this code, including but not limited to ComCheck, ResCheck, and worksheet or trade-off sheets from the New Mexico energy conservation code residential applications manual, issued by the New Mexico department of energy.

                B.            Section R102 Alternate Materials-Method of Construction, Design for Insulating Systems.  See this section of the IECC.

                C.            Section R103 Construction Documents.  Delete this section of the IECC and see 14.5.2 NMAC, Permits except retain Section R103.2 as amended.

                D.            Section R103.2 Information on construction documents.  Delete section and substitute the following: Ducts shall be installed in accordance with Chapter 6 and Chapter 17 of the New Mexico Mechanical Code and current applicable standards.

                E.            Section R104 Fees.  Delete this section of the IECC and see 14.5.5 NMAC, Fees.

                F.            Section R105 Inspections.  Delete this section of the IECC and see. 14.5.3 NMAC, General Provisions.

                G.            Section R106 Validity.  Delete this section of the IECC and see. 14.5.2.12 NMAC Permits.

                H.            Section R107 Referenced Standards.  All references to the international residential code shall be deemed references to 14.7.3 NMAC, the New Mexico Residential Building Code (NMRBC).  All references to the international plumbing code shall be deemed references to 14.8.2 NMAC, the New Mexico Plumbing Code (NMPC).  All references to the international mechanical code shall be deemed references to 14.9.2 NMAC, the New Mexico Mechanical Code (NMMC).  All references to the ICC or International Electrical Code shall be deemed references to 14.10.4 NMAC, the New Mexico Electrical Code (NMEC). All references to the international energy conservation code shall be deemed references to 14.7.6 NMAC, the New Mexico Residential Energy Conservation Code (NMRECC).  All references to the international fuel gas code in the 2018 IECC are deemed references to the NMMC or the LP gas standards found at 19.15.40 NMAC, and Sections 70-5-1 through 70-5-23 NMSA 1978.

                I.             Section R108 Stop Work Order.  Delete this section of the IECC and see 14.5.3 NMAC, Inspections.

                J.             Section R109 Board of Appeals.  Delete this section of the IECC and See 14.5.1 NMAC, General Provisions.

[14.7.6.9 NMAC - Rp, 14.7.6.9 NMAC, 9/25/2020;

 

14.7.6.10               CHAPTER 2 - DEFINITIONS:  See this chapter of the IECC residential provisions, adding the following definitions.

                A.            Section R201.1 Scope.  See this section of the IECC and add the following:  If the same term is defined in the New Mexico construction codes and in the IECC, the term shall have the meaning given it in the New Mexico construction codes.

                B.            Section R201.3 Terms defined in other codes.  Delete this section of the IECC and substitute with the following:  Terms defined in the New Mexico Residential Construction Code.

                C.            Section R201.4 Terms not defined in other codes.  See this chapter of the IECC.

                D.            Section R202 General Definitions.  See this section of the IECC except as provided below.

                                (1)           Unconditioned space.  Add the following definition:  Space within a building that is not mechanically heated or cooled and is outside the building thermal envelope.

                                (2)           Vapor retarder class.  Add the following definition:  a measure of a material or assembly’s ability to limit the amount of moisture that passes through that material or assembly.  Vapor retarder class shall be defined using the desiccant method of ASTME96 as follows:

                                                (a)           class I:                   0.1 perm or less;

                                                (b)           class II:                 > 0.1  perm            1.0 perm;

                                                (c)           class III:                > 1.0  perm            <10 perm.

                                (3)           NMRECC means 2018 New Mexico Residential Energy Conservation Code.

                                (4)           NMRBC means 14.7.3 NMAC, 2015 New Mexico Residential Building Code, which adopts by reference and amends the 2015 International Residential code.

                                (5)           NMPC means 2015 New Mexico Plumbing Code, which adopts by reference and amends the 2015 Uniform Plumbing Code.

                                (6)           NMMC means 14.9.2 NMAC, NMMC 2015 New Mexico Mechanical Code, which adopts by reference and amends the 2015 Uniform Mechanical Code.

                                (7)           NMEC means 14.10.4 NMAC, NMEC 2017 New Mexico Electrical Code, which adopts by reference and amends the 2017 National Electrical Code.

                                (8)           RESNET Software.  Is an approved software program to meet the performance requirements of the IECC.

                                (9)           COMCHECK.  Is the residential energy compliance tool designed by the U.S. department of energy (DOE) to clarify residential energy code compliance providing a user information whether building meets the requirements of the International Energy Conservation Code (IECC) and ASHRAE 90.1, as well as state-specific codes.

                                (10)         RESCHECK.  A document describing the overall efficiency of the insulation of a building which works by performing a simple U-factor x Area (UA) calculation for each building assembly to determine the overall UA of a building.  The UA of the proposed project building is compared to the code requirements.

                                (11)         ASTM.  Means the American society for testing and materials, an international standards organization that develops and publishes voluntary consensus building technical standards for a wide range of materials utilized in construction.

                                (12)         HERS.  Means the home energy rating system index and is the industry standard by which a home's energy efficiency is measured.  It is also the nationally recognized system for inspecting and calculating a home's energy performance.

[14.7.6.10 NMAC - Rp, 14.7.6.10 NMAC, 9/25/2020]

 

14.7.6.11               CHAPTER R301 - CLIMATE ZONES:  See this Chapter of the IECC except delete the text of section 301.1 General and replace with the following:  the table below in conjunction with Table 301.3(2) shall be used to determine the applicable requirements for Chapters 4.  Locations not listed in the table below shall use either Table 301.1, Section 301.3, or the building official may designate a climate zone consistent with the elevation, HDD & CDD from the table below.

 

Table 301.2

New Mexico Climate Zones Based on Heating and Cooling Degree Days

City

County

Elev. (feet)

Heating Degree Days

(HDD) 65°F

Cooling Degree Days (CDD)

50°F day

Climate Zone

Abiquiu Dam

Rio Arriba

6380

5872

 

5B

Angel Fire

Colfax

8406

9769

195

7B

Alamogordo

Otero

4350

3053

5309

3B

Albuquerque

Bernalillo

5312

4332

4462

4B

Artesia

Eddy

3380

3366

5374

3B

Aztec Ruins

San Juan

5644

5757

 

5B

Belen

Valencia

4800

4432

5012

3B

Bernalillo

Sandoval

5052

4782

4138

4B

Bloomfield

San Juan

5456

5490

 

5B

Bosque del Apache

Socorro

4520

3916

5012

3B

Carlsbad

Eddy

3295

2813

5997

3B

Carrizozo

Lincoln

5438

4234

3631

4B

Cedar Crest

Bernalillo

6581

5703

 

5B

Chaco Canyon

San Juan

6200

6137

 

5B

Chama

Rio Arriba

7871

8254

 

6B

Clayton

Union

5056

5150

3170

4B

Cloudcroft

Otero

8801

7205

 

6B

Clovis

Curry

4268

4033

4252

4B

Corona

Valencia

6690

5389

3631

4B

Cuba

Sandoval

7035

7122

 

5B

Deming

Luna

4305

3347

5292

3B

Dulce

Rio Arriba

6793

7979

 

6B

Eagle Nest

Colfax

8262

9254

 

7B

Edgewood

Santa Fe

6649

6146

 

5B

Espanola

Rio Arriba

5643

5641

 

5B

Farmington

San Juan

5395

5747

 

5B

Fence Lake

Cibola

7055

6396

 

5B

Fort Sumner

De Baca

4032

3799

4616

3B

Gallup

McKinley

6465

6207

 

5B

Glenwood

Catron

4725

3632

4427

4B

Grants

Cibola

6460

6143

 

5B

Hatch

Dona Ana

4052

3270

5904

3B

Hobbs

Lea

3622

2954

5181

3B

Jemez Springs

Sandoval

6198

5260

2059

4B

Las Cruces

Dona Ana

4000

3223

5904

3B

Las Vegas

San Miguel

6424

5738

 

5B

Lordsburg

Hidalgo

4250

3213

5210

3B

Los Alamos

Los Alamos

7320

6381

 

5B

Los Lunas

Valencia

4856

4725

4462

4B

Magdalena

Socorro

6572

5074

2093

4B

Mescalero

Otero

6611

5540

 

5B

Moriarty

Torrance

6220

4735

3786

4B

Mosquero

Harding

5485

5209

3631

4B

Mountainair

Torrance

6520

5558

 

5B

Organ

Dona Ana

5245

3215

4919

3B

Placitas

Sandoval

5955

4917

3701

4B

Portales

Roosevelt

4006

3845

4347

4B

Raton

Colfax

6680

6001

 

5B

Red River

Taos

8671

8742

179

7B

Reserve

Catron

5847

5483

 

5B

Rio Rancho

Sandoval

5282

4880

3949

4B

Roswell

Chaves

3573

3565

5505

3B

Ruidoso

Lincoln

6920

6309

 

5B

Sandia Crest

Bernalillo

10680

10034

 

7B

Sandia Park

Bernalillo

7077

7510

 

6B

Santa Fe

Santa Fe

7260

6001

 

5B

Santa Rosa

Guadalupe

4620

3749

4714

3B

Shiprock

San Juan

4892

5475

 

5B

Silver City

Grant

5895

4438

3975

4B

Socorro

Socorro

4603

3984

5147

3B

Springer

Colfax

5797

5653

 

5B

Taos

Taos

6967

6827

 

5B

Taos Ski Valley

Taos

9321

9769

 

7B

Tatum

Lea

3999

3680

4721

3B

Thoreau

McKinley

7200

5789

 

5B

Tierra Amarilla

Rio Arriba

7425

7901

 

6B

Tijeras

Bernalillo

6322

6338

 

5B

Tohatchi

McKinley

6447

5418

 

5B

Truth or Consequences

Sierra

4245

3394

5103

3B

Tucumcari

Quay

4096

3767

4429

4B

Tularosa

Otero

4508

3056

5130

3B

Zuni

McKinley

6293

5742

 

5B

[14.7.6.11 NMAC - Rp, 14.7.6.11 NMAC, 9/25/2020]

 

14.7.6.12               CHAPTER 4 - RESIDENTIAL ENERGY EFFICIENCY:  See this Chapter of the IECC except for the following:

                A.            R401.2 Compliance.   Delete the text of this section and replace with the following:  projects shall comply with 401 through 404, which are mandatory provisions, and additionally comply with one of the following:

                                (1)           Documents showing 2018 IECC Code Compliance, residential provisions approved by CID or worksheet trade-off sheets from the New Mexico energy conservation code residential applications manual; or

                                (2)           Section R405.

                                (3)           The energy rating index (ERI) approach in Section R406.

                                (4)           The approved sampling protocols included in Chapter 6 of the National Standard for Home Energy Ratings.

                                (5)           Code programs recognized by the state of New Mexico such as Build Green New Mexico or LEED-H, approved under IECC section 102.1.1, except strike the last sentence that reads:  The requirements identified as “mandatory” in Chapter 4 shall be met.

                B.            R402.2.8 Floors.  Delete the text of this section and replace with the following:  Floor framing-cavity insulation when separating conditioned and non-conditioned space shall be installed to maintain permanent contact with the underside of the subfloor decking.

Exception: As an alternative, the floor framing-cavity insulation shall be in contact with the topside of sheathing or continuous insulation installed on the bottom side of floor framing where combined with insulation that meets or exceeds the minimum wood frame wall R-value in Table R402.1.2 and that extends from the bottom to the top of all perimeter floor-framing members.

                C.            R402.4.1 Building thermal envelope.  Amending to read as follows:  The building thermal envelope shall comply with Sections R402.4.1.1 and R402.4.1.3 with optional compliance of R402.4.1.2 by all counties not mentioned in subsection F below.

                D.            R402.4.1.2 Testing.  Amend to read as follows: The building or dwelling unit shall be tested and verified as having an air leakage rate not exceeding four air changes per hour in Climate Zones 1 thru 8.  Testing shall be conducted in accordance with RESNET/ICC 380, ASTM E779 or ASTM E1827 and reported at a pressure of 0.2 inch w.g. (50 Pascals).

                E.            R402.4.1.3 Visual Inspection Option.  Add the following section: Building envelope tightness, and insulation installation shall be considered acceptable with the items listed in Table 402.1.2 applicable to the method of construction, if field verified by either the builder, a code official, or an energy rater using the state of New Mexico acceptable processes.  Acceptable processes include a thermal bypass visual inspection checklist, a thermal bypass certification or checklist from a HERS rater, a Build green NM checklist, or an energy star program checklist from the New Mexico Energy, Minerals and Natural Resources Department.

                F.            R402.4.1.4 Based on census. Add new section to read as follows: Based on census rural urban mapping the following areas will be required to comply with R402.4.1, R402.4.1.2 Testing and R403.3.3 Duct testing: San Juan County, Sandoval County, Santa Fe County, Bernalillo County, Torrance County, and Dona County.

                G.            R402.4.1.5 State of New Mexico Thermal Bypass Inspection Checklist and Duct Sealing Visual Inspection Checklist.  Add new section to read as follows: In accordance with section R402.4.1, R402.4.1.2 and R403.3.3 thermal bypass inspection checklist and Duct Sealing Visual Inspection Checklist will be provided at the time of issuance of building permit or can also be accessed at www.rld.State.nm.us/construction under forms and applications.

                H.            R403.1.1 Programmable thermostat.  The thermostat controlling the primary heating or cooling system of the dwelling unit shall be capable of controlling the heating and cooling system on a daily schedule to maintain different temperature setpoints at different times of the day.  This thermostat shall include the capability to set back or temporarily operate the system to maintain zone temperatures of not less than 55°F (13°C) to not greater than 85°F (29°C).  The thermostat shall be programmed initially by the manufacturer with a heating temperature setpoint of not greater than 70°F (21°C) and a cooling temperature setpoint of not less than 78°F.

Exceptions:

                                (1)           When a water circulation system is utilized to heat and/or cool the residence, no programmable set back thermostat is required.

                                (2)           Where the home is registered in a performance-based certification program, the requirements for a programmable thermostat shall be waived.

                                (3)           Where approved alternative methods of construction and/or materials are being used, programmable thermostats may be omitted.

                I.             R403.3.3 Duct testing (Mandatory).  Add the following Exception: (3.) Duct sealing shall be considered in compliance with R403.3.3 when field, verified by either the builder, a code official, or an energy rater using the state of New Mexico duct sealing visual inspection checklist.

                J.             R403.4 Mechanical system piping insulation (Mandatory). Add the following Exception: In-floor radiant heating or cooling systems do not require insulation.

[14.7.6.12 NMAC - Rp, 14.7.6.12 NMAC, 9/25/2020]

 

14.7.6.13               CHAPTER 5 - BUILDINGS:  See this Chapter of the IECC.

[14.7.6.13 NMAC - Rp 14.7.6.13 NMAC, 9/25/2020]

 

14.7.6.14               CHAPTER 6 - REFERENCED STANDARDS:  See this Chapter of the IECC.

[14.7.6.14 NMAC - Rp 14.7.6.14 NMAC, 9/25/2020]

 

HISTORY OF 14.7.6 NMAC:

Pre NMAC History:  None.

 

History of Repealed Material:

14.7.6 NMAC, 2003 New Mexico Energy Conservation Code (filed 5/27/2004) repealed 1/7/2004.

14.7.6 NMAC, 2006 New Mexico Energy Conservation Code (filed 8/16/2007) repealed 1/28/2011.

14.7.6 NMAC, 2009 New Mexico Energy Conservation Code (filed 12/28/2010) repealed 8/1/2011.

14.7.6 NMAC, 2009 New Mexico Energy Conservation Code (filed 6/15/2011) repealed 6/28/2013.

14.7.6 NMAC, 2009 New Mexico Energy Conservation Code (filed 6/28/2013) repealed 9/25/2020.

 

NMAC History:

14.7.6 NMAC, 2003 New Mexico Energy Conservation Code (filed 5/27/2004) replaced by 14.7.6 NMAC, 2006 New Mexico Energy Conservation Code, effective 1/1/2008.

14.7.6 NMAC, 2006 New Mexico Energy Conservation Code (filed 8/1622007) replaced by 14.7.6 NMAC, 2009 New Mexico New Mexico Energy Conservation Code, effective 1/28/2011.

14.7.6 NMAC, 2009 New Mexico Energy Conservation Code (filed 12/28/2010) replaced by 14.7.6 NMAC, 2009 New Mexico Energy Conservation Code, effective 8/1/2011.

14.7.6 NMAC, 2009 New Mexico Energy Conservation Code (filed 6/15/2011) replaced by 14.7.6 NMAC, 2009 New Mexico Energy Conservation Code, effective 6/28/2013.

14.7.6 NMAC, 2009 New Mexico Energy Conservation Code (filed 6/28/2013) replaced by 14.7.6 NMAC, 2018 New Mexico Energy Conservation Code, effective 9/25/2020.