Over the course of my career, most of my PDHs have come from ASHRAE, national conference seminars, and local lunch-and-learns. My ongoing education for other credentials largely comes from Greenbuild, USGBC, BuildingGreen and the Phius webinar library, with a meaningful share earned on actual certification projects.
I built this for the people who ask me where to look. That's usually mechanical engineers who care about healthy, high-performance buildings, IEQ and sustainability, and about the adjacent topics (enclosures, controls, carbon, codes) it takes to make building science work in the field. It's a starting point, not an exhaustive list.
Need hours? Tell me what they're for and what you want to learn.
The standard unit set by IACET: 1 CEU = 10 contact hours of organized instruction with qualified instructors. Breaks and meals don't count.
Watch out: many providers say "CEU" when they mean one hour. Check the certificate. A one-hour course should read 0.1 CEU.
One contact hour of instruction or presentation. It's the unit state engineering boards count for PE license renewal.
Under NCEES guidelines, 1 CEU = 10 PDH and 1 college semester hour = 45 PDH. Activities under 30 minutes don't count.
Your state board decides what qualifies, not the course provider.
One hour of eligible instruction earns 1 LU, recorded on your AIA transcript.
LU|HSW is an LU in health, safety and welfare. At least 75% of the course must address protecting building occupants. HSW hours count toward the total too.
AIA membership hours and state license hours are separate requirements, and they don't always match.
The unit for LEED and WELL credential maintenance. One hour of eligible activity = 1 CE hour. Courses count, and so can volunteering, authorship and project experience.
Specific hours (LEED-specific, WELL-specific) must tie directly to the rating system's credits, prerequisites or features. Everything else counts as general.
GBCI reports LEED hours; WELL hours you self-report to IWBI.