The HVAC Briefing

Littleton joined ASHRAE in the early 2000s and has served as the operational backbone of the Society's day-to-day functions, including management of its technical committees, research programs, and relationships with federal agencies like the Department of Energy and EPA. His tenure coincided with major transitions in refrigerant policy, efficiency mandates, and the shift from prescriptive codes to performance-based design standards that now define how contractors bid and install equipment.

ASHRAE's Board of Directors has confirmed that a formal search process will begin in the coming months to identify Littleton's successor. The organization has not yet announced whether the search will be internal or external, but the role requires deep familiarity with both the technical side of HVAC engineering and the political navigation required to work with manufacturers, contractors, utilities, and regulators. Whoever takes the position will inherit active projects including the ongoing revision of Standard 62.2 for residential ventilation, the A2L refrigerant transition oversight, and the integration of decarbonization language into future building codes.

For contractors, ASHRAE's leadership stability matters because the Society's standards become code requirements. Standard 90.1 drives commercial efficiency baselines. Standard 15 governs refrigerant safety and room volume calculations. Standard 180 sets the framework for building system commissioning. When ASHRAE shifts direction or accelerates rulemaking, it directly impacts what equipment you can install, how you calculate loads, and what training your techs need.

Littleton's departure comes as the industry faces a compressed timeline on several fronts: the 2025 rollout of A2L refrigerants in residential splits, the 2026 DOE efficiency rules for gas furnaces and air handlers, and the 2028 refrigerant allocation cuts under the AIM Act. The next EVP will need to manage those transitions while keeping ASHRAE's volunteer committee structure—thousands of engineers donating time to write standards—functional and responsive.

If you attend ASHRAE chapter meetings or serve on technical committees, expect to hear more about the search process in Q2 2025. ASHRAE typically seeks input from its membership base before finalizing executive appointments, and contractors with field experience are often underrepresented in those conversations. Now is the time to engage if you want the next generation of standards to reflect installation realities, not just engineering theory.