HVAC Glossary
HVAC Acquisition Terms
Vertical-specific terms used across the HVAC Atlas, Playbook, and Listings. Licenses, refrigerants, OEM dealer programs, service-agreement economics — defined precisely.
16 terms · Maintained by practitioners
License
1099 Qualifier (HVAC license role)
A non-employee licensed master HVAC contractor paid $500–$2,500/month to serve as an HVAC entity's named state license holder. Distinct from the generic 1099 contractor concept.
Master HVAC license: W-2 vs 1099 Qualifier
The structural distinction between a master HVAC license held by a W-2 employee versus a 1099 Qualifier — the single most common license-continuity issue in HVAC acquisitions.
RME / RMO (Responsible Managing Employee / Officer)
California Contractors State License Board (CSLB) classifications for the licensed individual responsible for an HVAC contractor's operations — RME requires bona fide employee status; RMO is owner/officer.
Regulatory
A2L-class refrigerant
The mildly flammable refrigerant class (R-32, R-454B) that replaces R-410A in new residential HVAC equipment under the EPA AIM Act phase-down.
AIM Act (American Innovation and Manufacturing Act)
Federal legislation directing the EPA's HFC phase-down. The Technology Transitions rule (40 CFR Part 84, Subpart B) sets the residential HVAC refrigerant transition timeline.
EPA Section 608 (Clean Air Act)
Federal regulation requiring technician certification and refrigerant recovery recordkeeping for any work on stationary refrigeration and AC equipment. Civil penalties run $37,500/day administrative or $124,426/day judicial under 40 CFR 19.4 (2025 adjustment).
R-410A refrigerant
The dominant residential HVAC refrigerant of the 2010s–early 2020s, now phased out for new equipment manufacture under the EPA AIM Act effective January 1, 2025.
Operational
AOR (Agreement on Repair) attach rate
The percentage of HVAC service repair calls that get converted to a maintenance agreement during the call. The clearest signal of organic versus marketing-acquired agreement growth.
Carrier Factory Authorized Dealer (FAD)
Carrier's tier-one residential dealer program — gates access to extended warranty terms, co-op marketing, preferred customer financing, and the Carrier brand. Re-evaluated at change of ownership.
Comfort Club agreement
A premium HVAC maintenance agreement tier ($349–$649/yr) bundling two annual visits with priority dispatch, repair discount, and filter delivery. Distinct from PM-only tune-up plans.
Lennox Premier Dealer
Lennox's tier-one residential dealer program — Premier badge, customer rebate access, preferred financing rate, and marketing materials.
Trane Comfort Specialist (TCS)
Trane's residential dealer program, tiered into TCS Select, TCS Prime, and TCS Premier based on commitment level and volume.
Financial
Labor
Comfort Advisor
The HVAC in-home sales role that runs system-replacement (changeout) consultations. Closes residential changeouts at 50–65% versus 25–35% for service techs running the same calls.
NATE Senior Level Efficiency Analyst
The top NATE certification tier, requiring two prior NATE service specialty certs. Senior-level technicians handle complex troubleshooting and serve as de facto lead techs.
NATE Specialist (HVAC technician certification)
North American Technician Excellence's mid-tier professional certification for HVAC technicians — qualifies for diagnostic and repair work as the primary service tech.
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