Kelly Heating & Air Conditioning, Inc.
1910 S Riverside Dr.
Iowa City, IA 52246
Ph: (319) 337-3520
Fax: (319)338-0157
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Indoor Air Quality Solutions


Air Advice Indoor Air Quality Testing
Answers to most commonly asked questions
Common IAQ problems and solutions
Health issues and Ozone facts

IAQ Products
MERV Ratings Explained

Understanding Indoor Air Quality

Pollutant Problems
    All homes, no matter how clean they appear, are contaminated with dirt and dust.
Older homes can be breeding grounds for mold and mildew.
New, tightly sealed homes trap pollutants and can have higher concentrations of chemicals.
Types & Sources of Pollutants        
Type Definition Pollutants Sources
Particles Pollutants found in the air •Pollen
•Dust mites
•Pet and human dander
Plants, people and animals
Microscopic pollutants that grow and reproduce in warm, humid environments Bacteria
Mold Spores
Plants, people and animals
Humidifier drip pans
Shower heads and toilets
HVAC systems that have not been properly maintained
Plumbing Leaks
Dampness in basements, crawl paces, attics and bathrooms
Odors/Chemical Vapors Air contaminants in the form of gases

Pet odors

Cooking smells

Gasoline fumes

Volatile organic compounds (VOCs), such as formaldehyde and gasoline

Carbon dioxide

Carbon monoxide

Cleaning supplies
Paints and solvents
Tobacco smoke
Carpeting and upholstery
Air fresheners
Automotive fuel and supplies
Dry-cleaned clothing
Stoves, heaters, fireplaces
Pesticides and herbicides
      Source: Lennox Industries -    
    Maintaining proper humidity levels, between 35% and 50%, has a significant impact on overall indoor air quality. Source: ASHRAE, adapted from Sterling et al., 1985