N.M. Admin. Code § 14.7.6.12

Current through Register Vol. 35, No. 21, November 5, 2024

Section 14.7.6.12 - CHAPTER 4 [RE] RESIDENTIAL ENERGY EFFICIENCY

See this Chapter of the IECC except as provided below.

A.Section R401 General. See this section of the IECC except as provided below.

(1)Section R401.2 Application. Delete this section of the IECC and substitute with the following: Residential buildings shall comply with one of the following sections: R401.2.1, R401.2.2, R401.2.3, or 401.2.4. Exception: Additions, alterations, repairs, and changes of occupancy to existing buildings complying with Chapter 5.

(2)Section R401.2.4 Tropical climate region option. Delete this section of the IECC and substitute with the following: Code programs recognized by the state of New Mexico. Programs such as build green New Mexico, LEED-H, or other programs approved under IECC section 102.1.1.

(3)Section R401.2.5 Additional energy efficiency. Delete this section of the IECC.

(4)Section R401.3 Certificate. Delete this section of the IECC.

B.Section R402 Building thermal envelope. See this section of the IECC except as provided below.

(1)Table 402.1.2 Maximum assembly U-factors and fenestration requirements. See this table in the IECC except as provided below.

(a) See this table in the IECC except in the ceiling U-Factor column change 0.026 to 0.028 in climate zone 3.

(b) See this table in the IECC except in the ceiling U-Factor column change 0.024 to 0.026 in climate zones 4 except marine, 5 and marine 4, 6, 7 and 8.

(2)Table 402.1.3 Insulation minimum R-values and fenestration requirements by component. See this table in the IECC except as provided below.

(a) See this table in the IECC except in the ceiling R-value column change 49 to 38 in climate zone 3.

(b) See this table in the IECC except in the ceiling R-value column change 60 to 49 in climate zones 4 except marine, 5 and marine 4, 6, 7 and 8.

(c) See this table in the IECC except in the slab R-value and depth column change 10ci, 4ft to 10ci, 2ft in climate zones 4 except marine, 5 and marine 4.

(3)Section 402.4 Air leakage. See this section of the IECC except as provided below.

(a)Section 402.4.1.2 Testing. See this section of the IECC except delete the last paragraph of the section and substitute with the following: Mechanical ventilation shall be provided in accordance with chapter 4 of the uniform mechanical code, as applicable, or with other approved means of ventilation.

(b)Section R402.4.1.4 Visual inspection option. Add the following section to the IECC: Building envelope tightness, and insulation installation shall be considered acceptable with the items listed in table 402.1.2 or table 402.1.3 applicable to the method of construction. It shall be field verified by the code official as part of the inspection process, and the builder or an energy rater may also field verify using the state of New Mexico acceptable processes. Acceptable processes include but are not limited to the following: construction industries division 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.

(c)R402.4.1.5 Based on census. Add the following section to the IECC: Based on census rural urban mapping the following areas will be required to comply with R402.4.1 building thermal envelope, R402.4.1.2 testing, and R403.3.5 Duct testing: San Juan County, Sandoval County, Santa Fe County, Bernalillo County, Torrance County, and Dona Ana County.

(d)R402.4.1.5 State of New Mexico Thermal Bypass Inspection Checklist and Duct Sealing Visual Inspection Checklist. Add the following section to the IECC: In accordance with sections R402.4.1, R402.4.1.2 and R403.3.5 the 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.nm.gov/construction-industries/ under forms and applications.

C.Section R403 Systems. See this section of the IECC except as provided below.

(1)Section R403.1.1 Programmable thermostat. See this section of the IECC except add the following exceptions to the end of the section:

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

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

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

(2)Section R403.3.5 Duct testing. See this section of the IECC and add the following to the methods: 3. Duct sealing shall be considered in compliance with R403.3.5 when field inspected by the code official and verified by the builder or an energy rater using the state of New Mexico duct sealing visual inspection checklist which can be accessed at www.rld.nm.gov/construction-industries.

(3)Section R403.4 Mechanical system piping insulation. See this section of the IECC and add the following exception: In-floor radiant heating or cooling systems do not require insulation.

D.Section R404 Electrical power and lighting systems. See this section of the IECC except as provided below.

(1)Section R404.4 Electric vehicle power transfer infrastructure. Add this section to the IECC. New residential automobile parking spaces for residential buildings shall be provided with electric vehicle power transfer infrastructure in accordance with Section R404.4.1 and Section R404.4.2.

(2)Section R404.4.1 Quantity for single- and two-family dwellings. Add this section to the IECC. New one- and two-family dwellings and townhouses as defined in 14.7.3 NMAC with a designated attached or detached garage or other onsite private parking provided adjacent to the dwelling unit shall be provided with the following:

(a) One electrical receptable box

(b) 8 ga. wiring from receptable box to a 50-amp circuit breaker in the electrical panel

(c) The circuit breaker in the electrical panel and the receptable box shall be marked "For future electrical vehicle charging equipment".

(3)Section R404.4.2 Quantity for residential buildings with R-2, R-3, R-4 Occupancy classifications. Add this section to the IECC. New R-2, R-3, and R-4 buildings that are three stories or less above grade plane shall comply with Section C405.13 of the NMCECC.

E.Section R408 Additional efficiency package options. See this section of the IECC except as provided below.

(1)Section R408.1 Scope. Delete this section of the IECC and substitute with the following: This section establishes additional efficiency package options.

(2)Section R408.2 Additional efficiency package options. Delete this section of the IECC and substitute with the following: Additional efficiency package options are set forth in Sections R408.2.1 through R408.2.10.

(a)Section R408.2.1 Enhanced envelope performance option. See this section of the IECC.

(b)Section R408.2.2 More efficient HVAC equipment performance option. See this section of the IECC.

(c)Section R408.2.3 Reduced energy use in service water-heating option. See this section of the IECC.

(d)Section R408.2.4 More efficient duct thermal distribution system option. See this section of the IECC.

(e)Section R408.2.5 Improved air sealing and efficient ventilation system option. See this section of the IECC.

(f)Section R408.2.6 Electric readiness. Add this section to the IECC. Water heaters, household clothes dryers, and cooking appliances that use fuel gas or liquid fuel shall comply with the requirements of Sections R408.2.7 through R408.2.10.

(g)Section R408.2.7 Cooking appliances. Add this section to the IECC. A dedicated branch circuit with a rating not less than 240-volts, 40-amperes shall be installed and terminate within three feet (304 mm) of conventional cooking tops, conventional ovens or cooking appliances combining both. Exception: Cooking appliances not installed in an individual dwelling unit.

(h)Section R408.2.8 Household clothes dryers. Add this section to the IECC. A dedicated branch circuit with a rating not less than 240-volts, 30-amperes shall be installed and terminate within three feet (304 mm) of each household clothes dryer. Exception: Clothes dryers not installed in an individual dwelling unit.

(i)Section R408.2.9 Domestic hot water heaters. Add this section to the IECC. A dedicated branch circuit with a rating not less than either 240-volts, 30-amperes or 120V, 20-amperes shall be installed and terminate within three feet (304 mm) of each domestic hot water heater. Exception: Water heaters serving multiple dwelling units serving an R-2 occupancy.

(j)Section R408.2.10 Electrification-ready circuits. Add this section to the IECC. The unused conductors required by sections R408.2.6 through R408.2.9 shall be labeled with the word appropriate to the appliance terminus. Capacity for the circuits required by Sections R408.2.6 through R408.2.9 shall be included in the load calculations of the original installation.

N.M. Admin. Code § 14.7.6.12

Adopted by New Mexico Register, Volume XXXI, Issue 16, August 25, 2020, eff. 9/25/2020, Adopted by New Mexico Register, Volume XXXV, Issue 02, January 30, 2024, eff. 1/30/2024