California’s Indoor Heat Illness Prevention standard continues to reshape how commercial and industrial facilities manage summer operations. Under the rule, employers must maintain indoor workspaces below 87°F when employees are present, or 82°F in areas where workers wear protective clothing or handle high-radiant-heat equipment. For warehouses, manufacturing floors, and distribution centers across the Los Angeles region, that threshold puts real pressure on aging HVAC systems that were never designed with these limits in mind.
Compliance isn’t just about running the AC harder. It starts with an honest assessment of a building’s cooling capacity relative to its occupancy and equipment loads. Many older commercial systems were sized decades ago for lighter usage patterns, and simply cranking the thermostat down can overload compressors, shorten equipment life, and spike utility bills without solving the underlying airflow problem.
We’re seeing more building owners request load studies and ductwork evaluations specifically to document compliance readiness before an inspection, not after a citation. Supplemental measures — portable cooling units, improved ventilation in high-heat zones, and staged fan systems — are increasingly used to bridge gaps while longer-term retrofits are planned and budgeted.
The takeaway for property managers: don’t wait for a heat wave to find out where your system falls short. A proactive inspection this month can identify problem zones, verify your system’s actual capacity, and give you documentation that supports both employee safety and regulatory compliance heading into the hottest stretch of the year.
If your facility has zones that consistently run warm regardless of thermostat settings, that’s usually a sign of an airflow or capacity issue worth investigating now, before fall maintenance season gets underway.
Temple Air Conditioning and Heating 