Manual J calculator · NM
Manual J load calculation for New Mexico.
Reference data for Manual J load calculations in New Mexico: ASHRAE design temperatures for 3 top metros, energy code status, and NM RLD / CID licensing. The calculator does not load this page's data. It asks for your project location and looks up outdoor design conditions in its own dataset, by IECC 2021 climate zone for a ZIP code or by weather station for the 10 major metros in its city list.
Reference metro
Albuquerque, NM (Bernalillo County) · IECC 2015 zone 4B · winter 99% DB 22°F · summer 0.4% DB 95°F · MCWB 60°F.
0.4% DB: ASHRAE 2021 station value · Manual J 8 loads use the 1% DB
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01 · ASHRAE design conditions
Top 3 metros in New Mexico - ASHRAE design temperatures.
These are the ASHRAE 99% heating and 0.4% cooling design temperatures, not the absolute extremes. Outdoor temperatures go past the 0.4% cooling value about 35 hours per year and below the 99% heating value about 88 hours per year.
Manual J 8th edition load calculations use the 1% cooling and 99% heating design temperatures. For ENERGY STAR new homes, the EPA recommends "the ACCA Manual J, 8th edition, 1% cooling season design temperature and 99% heating season design temperature for the weather station that's geographically closest to the home" ( ENERGY STAR, Design Temperature Limits). For the same station the 1% cooling value is exceeded about 88 hours a year, against about 35 for the 0.4% value, so it is the lower of the two, and the table's cooling column is not the Manual J design temperature.
| Metro | County | Zone (IECC 2015) | Winter 99% DB | Summer 0.4% DB | MCWB |
|---|---|---|---|---|---|
| Albuquerque | Bernalillo County | 4B | 22°F | 95°F | 60°F |
| Las Cruces | Doña Ana County | 3B | 27°F | 99°F | 62°F |
| Santa Fe | Santa Fe County | 5B | 15°F | 92°F | 58°F |
Design temperatures are single station values from the ASHRAE 2021 Climatic Design Conditions (99% heating, 0.4% cooling), one airport station per metro, in whole °F within 1°F. DB = dry-bulb. MCWB = mean coincident wet-bulb at the 0.4% cooling design hour.
Zones in this table are from the IECC 2015 county map (PNNL county data). For a ZIP code, BuildSolver's calculator assigns zones by the IECC 2021 county map, which gives the same zones for these counties. A ZIP code near a zone line can get the neighboring zone.
02 · Energy code
Energy code baseline in New Mexico is NM Energy Conservation Code based on IECC 2021 with amendments.
In effect since 2024. 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's residential energy code is the 2021 IECC with state amendments, effective January 30, 2024 (DOE Building Energy Codes Program). The Construction Industries Division operates the residential and commercial energy codes.
Code status from DOE Building Energy Codes Program - New Mexico status, verified October 6, 2026.
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
- $24.17
- Mean annual wage
- $55,330
- Employment estimate
- 1,950
Wage figures from BLS OEWS May 2025, SOC 49-9021 (state-level), released May 15, 2026.
04 · License & permit
HVAC licensing in New Mexico runs through 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-3 Mechanical classification for HVAC work (14.6.6.11 NMAC)
- MM-98 Licensure in all individual mechanical classifications MM-1 through MM-4
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.
A replacement install typically requires a permit as well.
At high elevation (Santa Fe, Taos), gas-furnace input is derated per the manufacturer's altitude tables; confirm with the local building department what the permit review checks.
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 27°F to 15°F across that elevation band, and the heating design temperature difference grows by about a quarter from south to north (70°F indoors).
+How does altitude affect Manual J in Santa Fe?
At 7,200 ft, air density is about 19% lower than at sea level (standard atmosphere). 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 air-density correction only where Census and USGS data pin down a ZIP's elevation, as for central Santa Fe. Where the Census and USGS data cannot pin down a ZIP's elevation, the result states that no altitude correction was applied; give the chat the site elevation. Confirm the furnace derate against the manufacturer's table.
+What licenses do I need for residential HVAC in NM?
Under 14.6.6.11 NMAC, HVAC work falls under the MM-3 mechanical classification. MM-98 indicates a contractor licensed in all of the individual classifications MM-1 through MM-4. Apprentice and journeyman registrations are separate from the contractor license.
+Does Albuquerque require Manual J for a permit?
Yes - under the current NMECC (2021 IECC with amendments), residential HVAC equipment must be sized per ACCA Manual S based on loads calculated with ACCA Manual J or another approved methodology. Confirm the documentation format with Albuquerque's building department. BuildSolver is not ACCA-approved for permit submission. Use its output for sales-phase sizing and client quotes, and produce the permit submittal in ACCA-approved software such as Wrightsoft Right-J8 or Cool Calc Manual J.
+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 58-62°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 2025 (released May 15, 2026) reports a $24.17/hr median for New Mexico HVAC mechanics and installers, with an annual mean of $55,330. The national median is $29.33/hr.
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. Outdoor design conditions come from its own dataset (by IECC 2021 climate zone for a ZIP code, by weather station for the 10 major metros in its city list), not from the metro table on this page.
Start New Mexico calculationRelated · same climate zone
Other states with similar ASHRAE climate zones.
Climate-driven Manual J inputs such as infiltration, latent share, and design temperatures behave similarly across states that share a climate zone. Each page below gives that state's own design temperatures and licensing context. Zones combine the IECC 2015 and IECC 2021 county maps.
Data last reviewed October 16, 2026 · underlying sources as of May 15, 2026