You breathe more than 3,400 gallons of air a day. Air inside a home or office can be several times more polluted than the air outside. Mold and other biological pollutants can worsen asthma, hay fever, and allergies. Pet dander and tobacco smoke can bring on headaches, dizziness, and the same allergy symptoms.
Chemical pollutants add to that load: radon, carbon dioxide, and gases from formaldehyde in carpet, drapery, cleaners, furniture, and building materials. Tight construction holds that mix indoors and recirculates it.
Four things that shape indoor air
- Particles such as pollen and pet dander
- Mold, bacteria, and other living organisms
- Odors and chemicals
- Temperature and humidity that are out of balance
Poor ventilation and contaminants from indoors and outdoors are the main sources. High humidity makes them multiply. Dry air can split wood floors and crack finishes. Humid air feels warmer than the thermostat says. Irritants such as mold can cause congestion, fatigue, headaches, and worse allergies.
How we clear it
The most effective step is to deal with contaminants at the source, then treat what still circulates:
- Whole-system air cleaners that catch particles as air moves through the heating and cooling equipment
- Moisture control and mold prevention
- Dehumidifiers and humidifiers matched to the system
- Adequate ventilation
Lennox publishes a useful overview of indoor air quality equipment at lennox.com.