HVAC Systems and Filtration
I am the system that heats, cools, and circulates air in a building to keep indoor spaces comfortable. What am I?
What is the HVAC system?
I float in the air as tiny, often invisible particles. When people move around or clean, I get stirred up before settling on surfaces like vents, furniture, and floors. What am I?
What is dust?
I grow in warm damp places and look like stains on walls or ceilings. I spread tiny spores that can cause allergies or breathing issues. What am I?
What is mold?
This symptom often happens during meetings when the air quality is poor. Low ventilation, high humidity, cooler temperatures, or high pollen levels can trigger it. What am I?
What is a headache?
I help move air through a space to improve circulation and support ventilation. I work well near windows or open areas where fresh air can flow. What am I?
What are fans?
I trap dust, allergens, and other pollutants as air passes through me. If I’m not replaced regularly, airflow drops and indoor air quality gets worse. What am I?
What is an air filter?
I come from vehicle exhaust and other city pollution. I can enter buildings through vents or open windows, especially near busy streets. When my levels are high, indoor air quality becomes harder to maintain. What am I?
What are outdoor air pollutants (or contaminants)?
I form on cold surfaces when warm, moist air touches them. If I build up, I turn into water droplets and can lead to mold or other indoor air quality problems. What am I?
What is condensation?
I involve sensing or detecting something unpleasant in the air. I can be caused by cleaning products, mold, or other indoor contaminants. When I’m noticeable, I often signal a potential indoor air quality issue that needs attention. What am I?
What are odors?
I deliver conditioned air into a room to keep occupants comfortable. When furniture or other objects block my opening, the airflow I provide can’t circulate properly. People rely on me to maintain a consistent temperature and overall comfort in the space. What am I?
What is a supply vent (or a supply air vent)?
I help control how much air moves through a room. I can open or close to direct airflow and keep the HVAC system balanced and comfortable. What am I?
What is a damper?
I am a biological substance. I drift through the air and can easily spread throughout indoor spaces. When I am present, I can trigger allergies and other respiratory symptoms in sensitive individuals. What am I?
What are mold spores?
I move quietly along pipes, ceilings, or hidden building spaces. I can leave behind stains on tiles or walls, and I often go unnoticed until visible damage appears. What am I?
What is a water leak?
Dust or allergens can cause this indoor‑air‑quality problem. It often gets worse with poor ventilation and can cause coughing, sneezing, a runny nose, or trouble breathing. What is it?
What is an allergic reaction?
I pull air from rooms and send it back to the HVAC system to be filtered and recirculated. If dust builds up around me, it means I need cleaning or maintenance. What am I?
What is a return vent (or a return air vent)?
I clean the air in small indoor spaces. Some models use HEPA filters to remove dust, allergens, and other pollutants. I'm helpful when a room doesn't have good ventilation. What am I?
What is a portable air purifier?
I come from things like carpets, upholstery, and office furniture. When I get into the air, I can cause sneezing or other allergy symptoms. Regular vacuuming and cleaning help reduce my presence. What am I?
What are allergens?
I am measured as a percentage that reflects the amount of moisture in the air. When I am too high, a space can feel damp or muggy. When I am too low, the air becomes dry and uncomfortable. What am I?
What is humidity?
I create areas in a room that feel noticeably warmer or cooler than the surrounding space. I happen when airflow is uneven or when the HVAC system isn’t distributing air properly. What am I?
What are hot or cold spots?
I supply a building with fresh outdoor air, helping to dilute indoor pollutants and reduce stuffiness. When my levels are low, spaces can quickly feel stale or uncomfortable. What am I?
What is ventilation?
I am a rating system that shows how well an air filter captures particles of different sizes. For example, 1–8 for large, 9–12 for medium, 13–16 for small, and HEPA for very small particles. What am I?
What is the MERV (Minimum Efficiency Reporting Value) rating system?
I am produced by certain types of office equipment, such as printers and copiers. I cannot be seen, but I can irritate the respiratory system and contribute to poor indoor air quality. What am I?
What is ozone?
I reduce the amount of moisture in indoor air, helping to prevent mold growth and create a more comfortable environment. I am especially useful during humid seasons when dampness becomes a problem. What am I?
What is a dehumidifier?
I happen when the air gets very dry, especially in winter. I can make touching doorknobs, papers, or electronics a bit annoying. What am I?
What is static electricity?
I happen when air doesn’t move well, making a room feel stuffy. When I’m around, it means ventilation needs to be improved. What am I?
What is stale or stagnant air?