Do your employees or tenants complain of headaches, stuffy noses, fatigue, or trouble concentrating that mysteriously clear up once they leave the building? That pattern has a name: sick building syndrome. It’s more common than most property owners realize, and the good news is that the most common causes are fixable. Here’s what’s really going on and what to do about it.
What is sick building syndrome?
The U.S. EPA defines sick building syndrome as situations where building occupants experience acute health and comfort effects that appear linked to time spent in the building — but no specific illness or cause can be pinned down. The tell-tale sign is that symptoms ease or disappear when people leave the building. By the EPA’s own estimates, up to 30% of new and remodeled buildings generate elevated complaints about indoor air.
Common symptoms
- Headaches and difficulty concentrating
- Eye, nose, or throat irritation
- Dry cough and dry or itchy skin
- Dizziness, nausea, and fatigue
- Heightened sensitivity to odors
Individually these seem minor, but across a workforce they add up to more sick days, lower productivity, and tenant or employee complaints.
What causes it — and why HVAC is usually involved
The EPA points to a few main culprits, and your HVAC system sits at the center of most of them:
- Inadequate ventilation. When a heating and cooling system doesn’t bring in and distribute enough fresh air, contaminants build up indoors.
- Poorly maintained HVAC systems that circulate dust, mold, and allergens through the building.
- Chemical contaminants indoors — VOCs off-gassing from carpet, furniture, cleaning products, copiers, and manufactured wood (formaldehyde is a common one).
- Biological contaminants like mold, bacteria, and pollen — often thriving in damp ductwork or around coils, especially in humid Atlanta.
In other words, a dirty or under-maintained air system doesn’t just fail to help — it actively recirculates the very contaminants making people feel unwell.
How to fix sick building syndrome
Because the causes are largely environmental, the fixes are too. The most effective steps:
- Clean the HVAC system and ductwork. Removing built-up dust, debris, and microbial growth from ducts, coils, and the blower stops the system from circulating contaminants. This is the foundation — see our commercial air duct cleaning services.
- Improve ventilation and airflow so fresh air actually reaches occupants.
- Control moisture and test for mold. If symptoms point to biological contaminants, air and mold testing identifies the problem so it can be removed.
- Add HVAC disinfection or UV light. UV systems and disinfection continuously suppress microbial growth in the air handler.
- Reduce indoor pollution sources — low-VOC materials, proper storage of chemicals, and good filtration.
Why it’s worth acting on
Poor indoor air quality is a quiet drain on any business. The EPA has noted that indoor air can be 2 to 5 times more polluted than outdoor air, and in an office, warehouse, medical facility, or school, that translates directly into absenteeism, complaints, and lost productivity. Addressing the air system is one of the highest-return building investments you can make for occupant health and comfort.
Frequently asked questions
How do I know if it’s sick building syndrome?
The biggest clue is the pattern: multiple people have similar symptoms that improve when they leave the building. An indoor air quality assessment helps pinpoint the cause.
Will duct cleaning alone solve it?
Often it’s the most important step, but the best results come from cleaning the full air path, improving ventilation, and addressing any moisture or VOC sources together.
What types of buildings does this affect?
Offices, retail, medical and dental facilities, schools, warehouses, and any space with a shared HVAC system and limited fresh-air exchange.
Clear the air in your building
If your building has these symptoms, Atlanta Air Experts can help diagnose and fix the root cause — from commercial duct and coil cleaning to mold testing, HVAC disinfection, and UV air purification. We’re NADCA-certified, licensed, and insured, serving businesses across metro Atlanta. Call (678) 436-8288 or request a free quote.
