Code Compliance, Permits, Inspections, and Energy Code (NM Energy Conservation Code, ASHRAE 90.1/90.2, IECC)
Permits and inspections
The New Mexico Mechanical Code is adopted at 14.6.4 NMAC, based on the Uniform Mechanical Code with state amendments. A permit is required before installing, altering, or replacing HVAC equipment and duct systems; the licensed contractor pulls it, posts it, and calls for inspections. Rough-in inspection happens before ducts or piping are covered; the final inspection happens after startup and controls are complete. Work done without a permit can be ordered exposed and re-inspected.
Energy code
The New Mexico Energy Conservation Code applies to new and altered construction, with commercial projects allowed to comply through ASHRAE 90.1 and residential through 90.2 or the IECC path. Verify duct insulation levels, duct sealing and leakage testing, equipment minimum efficiencies (SEER2, EER2, AFUE, HSPF2), thermostat controls, and economizer requirements for larger commercial cooling. New Mexico sits in the Southwest efficiency region, so higher SEER2 cooling minimums apply.
Worked example
A crew replaces a 3-ton condenser and furnace in one day and closes the ceiling. At final inspection CID has no rough-in record, and the duct leakage test shows 7 cfm per 100 square feet of conditioned floor area against a 4 cfm limit. The remedy is to expose and correct the duct connections, seal and retest, then request both inspections - a costly redo a scheduled rough-in would have avoided.
Traps
Assuming like-for-like replacement needs no permit; calling for final before startup; skipping duct leakage testing; installing 80 percent furnaces where the design specifies sealed combustion; ignoring commercial economizer and control requirements.