Manual J calculator · NM
Manual J load calculation for New Mexico.
Run an ACCA Manual J 8th Edition residential load calculation with climate context pre-loaded for New Mexico — ASHRAE design temperatures for 3 top metros, 2018 NM Energy Conservation Code (based on IECC 2018), and NM RLD / CID licensing context already accounted for in the assumption defaults.
Pre-loaded scenario
Albuquerque, NM (Bernalillo County) · ASHRAE zone 4B · winter 99% DB 17°F · summer 0.4% DB 95°F · MCWB 62°F.
ASHRAE 169-2021 · ACCA MJ8 §6
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01 · ASHRAE design conditions
Top 3 metros in New Mexico — design temperatures used in Manual J.
These are the ASHRAE 99% heating and 0.4% cooling design temperatures — the values Manual J uses for the design day, not the absolute extremes. Equipment sized to these conditions undersizes for ~35 hours per year in summer (acceptable per ACCA convention) and ~22 hours per year in winter.
| Metro | County | Zone | Winter 99% DB | Summer 0.4% DB | MCWB |
|---|---|---|---|---|---|
| Albuquerque | Bernalillo County | 4B | 17°F | 95°F | 62°F |
| Las Cruces | Doña Ana County | 3B | 22°F | 99°F | 64°F |
| Santa Fe | Santa Fe County | 5B | 10°F | 89°F | 60°F |
Source: ASHRAE 169-2021 (republished in EERE Building America Guide 7.3, public domain). DB = dry-bulb. MCWB = mean coincident wet-bulb at the 0.4% cooling design hour.
02 · Energy code
New Mexico energy code: 2018 NM Energy Conservation Code (based on IECC 2018)
Adopted 2021. Manual J load-calc documentation requirements flow from the state energy code; verify your specific AHJ’s submittal rules before relying on the baseline.
- New Mexico adopted IECC 2018 as the basis for the 2018 NMECC, effective 2021. The Construction Industries Division operates the residential and commercial energy codes.
- High-altitude provisions in northern NM (Santa Fe, Taos) affect combustion-appliance derating and venting calculations.
Source: NM Regulation & Licensing Department — Construction Industries Division · verified 2024-06-20
03 · New Mexico HVAC labor data
BLS wages and employment for HVAC mechanics in New Mexico.
These are state-level wages for occupation code 49-9021 — Heating, Air Conditioning, and Refrigeration Mechanics and Installers — from the most recent BLS Occupational Employment and Wage Statistics release.
- Median hourly wage
- $22.91
- Mean annual wage
- $48,900
- Employment estimate
- 2,490
Source: BLS OEWS May 2023, SOC 49-9021 (state-level) · released 2024-04-03. Loaded labor rates billed to customers typically run 2.5–3.5× the technician wage after overhead.
04 · License & permit
HVAC licensing in New Mexico: NM RLD / CID.
State-level HVAC contractor licensing is administered by the NM Regulation & Licensing Department — Construction Industries Division. Licenses renew every 3 years.
License types
- MM-98 Mechanical Contractor (HVAC, residential and commercial)
- GA-98 General Contractor with mechanical scope
Permits
Albuquerque, Santa Fe, and Las Cruces all require mechanical permits for HVAC installations and most change-outs. Smaller jurisdictions defer to county-level inspection programs.
Replacement permit: typically required.
High-altitude jurisdictions (Santa Fe, Taos) require combustion equipment to be derated per manufacturer altitude tables — the permit reviewer will check this on gas-furnace installs above 5,000 ft elevation.
05 · FAQ
Common Manual J questions for New Mexico contractors.
+Why does NM have three climate zones in such a small state population-wise?
Elevation. Las Cruces sits at 3,900 ft (zone 3B), Albuquerque at 5,300 ft (zone 4B), and Santa Fe at 7,200 ft (zone 5B). Winter design temps drop from 22°F to 10°F across that elevation band — Manual J heating loads triple per square foot from south to north.
+How does altitude affect Manual J in Santa Fe?
At 7,200 ft, air density is about 23% lower than sea level. Cooling-coil sensible capacity derates by roughly the same percentage; gas-furnace input ratings derate per manufacturer altitude tables (typically 4% per 1,000 ft above 2,000 ft). BuildSolver applies the altitude-derate factor automatically.
+What licenses do I need for residential HVAC in NM?
MM-98 is the standard mechanical contractor classification covering HVAC. GA-98 (general contractor) can include HVAC scope if the licensee has the underlying competency. Apprentice and journeyman registrations are separate from the contractor license.
+Does Albuquerque require Manual J for a permit?
Yes — under the 2018 NMECC, residential HVAC equipment must be sized per Manual J. Albuquerque's building department accepts documented Manual J output with audit trail; BuildSolver's output meets that documentation standard.
+Why is NM's design wet-bulb so low?
All three major metros (Las Cruces, Albuquerque, Santa Fe) have summer design wet-bulb in the 60–64°F range — among the lowest in the U.S. Sensible-to-total ratio runs 0.9+ across the state. Equipment selection should target sensible capacity; oversizing on total capacity leads to short-cycling and humidity problems even in a dry climate.
+What's the average HVAC wage in New Mexico?
BLS OEWS May 2023 reports $22.91/hr median for New Mexico HVAC mechanics and installers — about $48,900 annual mean — slightly below the national median.
Try a New Mexico load calculation now.
The chat will ask follow-up questions like an experienced engineer — square footage, construction type, window count, insulation level — and run the Manual J on your inputs with New Mexico’s ASHRAE design temperatures applied automatically. About 90 seconds end to end.
Start New Mexico calculationRelated · same climate zone
Other states with similar ASHRAE climate zones.
Manual J assumptions for infiltration, latent share, and design temperatures behave similarly across states that share an ASHRAE zone. The pages below carry the same procedural defaults with their own local design temps and licensing context.
Data last reviewed 2026-05-19 · underlying sources as of 2024-04-03