Odor complaints in office buildings are among the more sensitive facilities management situations — they affect productivity, employee wellbeing, and can trigger HR involvement if not handled promptly and professionally.

The Most Common Office Building Odor Sources

• HVAC system issues: The single most common source. Mold in the air handler, contaminated ductwork, failed drainage, or cross-contamination between office suites through shared HVAC all produce pervasive odors difficult to localize without professional assessment.
• Bathroom and plumbing odors: Sewer gas from dried P-traps in infrequently used bathrooms, grout and caulk breakdown, or failing drain seals.
• Neighboring tenant issues: Restaurant or food service tenants in adjacent suites can create odors that migrate through shared HVAC or building cavities.
• Older commercial carpet: Accumulates biological material and VOCs over years of occupancy, producing baseline off-gassing odor particularly in high humidity periods.

The Response Protocol That Works

• Document the complaint formally — date, location, description, affected employees
• Identify the source before treating — ordering air freshener or ozone before understanding the cause wastes money and frustrates employees when the smell returns
• Address the source, then treat the odor — fix the HVAC issue or plumbing issue first, then odor treatment as the final step
• Communicate to affected employees — employees who complained need to know what you found and what you did

Treatment in Occupied Office Buildings

Hydroxyl generators are safe for occupied spaces and can run during off-hours with minimal staff present. Ozone treatment requires full vacation of the treated area — appropriate for after-hours treatment of a defined space. For HVAC-distributed odors, treatment through the ductwork during off-hours is most effective. OC Refresh provides before-and-after documentation on every commercial job.