The New HVAC Impact on Offsite Construction: What You Need to Know

Dec. 11, 2024. Audree Grubesic. 3 min read.

Background

The American Innovation and Manufacturing Act of 2020 and an EPA rule established a 15-year phasedown of hydrofluorocarbons (HFCs).

HFCs from HVAC equipment make up about 75% of total HFCs in the United States.

Enforcement in many sectors begins on January 1, 2025.

The most common lower-global-warming-potential alternative is R-454B. It is effective at cooling. It is classified as A2L, which means it is slightly more flammable than its predecessor.

The transition has driven changes to ASHRAE, UL, and ICC standards. The 2024 International Code Council I-Codes now align and allow A2Ls for commercial and residential use.

Recommendations for the A2L transition

• Understand local regulations. Local codes can differ by factory location and destination site.
• Order early. Demand for A2L-compliant equipment is likely to increase.
• Plan storage. A2L refrigerants have new storage guidelines, including spacing and labeling requirements.
• Train HVAC contractors and technicians. Equipment, pumps, and leak detectors must be rated for Class A2L refrigerants.
• Collaborate early and often. A strategic partner can help with designers, suppliers, electricians, installers, and trainers.

Operational points for offsite construction

• Permit and inspection requirements may change state to state.
• Factory schedules can be affected if HVAC equipment is delayed.
• Simultaneous building and site development depends on equipment availability.

Wesco mention

Wesco says it offers offsite construction capabilities and cost-effective HVAC solutions from preferred suppliers Bard, Trane, and Lennox.

Referenced organizations

• EPA
• ASHRAE
• UL
• International Code Council
• National Association of Home Builders
• Air-Conditioning, Heating, and Refrigeration Institute (AHRI)