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Combatting indoor allergies   Find out steps you can take to reduce suffering.
Plants and your indoor air quality   Reduce your volatile organic compound levels!
What's that Stuff in Your Air Ducts?   A common source of occupant complaints!
Handling Odors in Commercial Buildings   Ozone generators can help - with certain precautions.
How to choose a filter   Check out our chart.
Carpets and your indoor air quality   Keep them clean, keep them dry. Find out more.
To sanitize or not to sanitize.   Sanitizing is not always a good idea, find out why.
Mold inspections when buying a house   Find out what to look for.
How often should you clean your heating, ventilation and air conditioning system?
Sick Building Syndrome   What is it and what can you do about it?
Now that the smoke has cleared.   How to handle IAQ problems after Southern California fires.
Indoor Air Quality and your Building.
What it REALLY takes to clean an air conditioning system!   See the pictures!
Fiberglass - Effects and Alternatives   OSHA - Find out what they have to say.
Shafted   We have said many times, “NOW we’ve seen it all!” only to stumble across something we’ve never seen before.
The Magic of Out Side Air   The secret to reduce toxins in your building.
The Purpose of indoor air quality investigations.   Hopefully it's not to take measurements and not resolve the situation.
Action to Take Before and Aftera Build-Out   After the build-out the area should be environmentally deep cleaned.
Ozone and Odors   Inherent instability of ozone is also the impetus behind its ability to neutralize odors.
What to do in the fires!   Think about getting some carbon filters
Dust - It's not just dirt!   It's skin flakes, fibers from clothes and more.
Humidity and Indoor Air Quality   Don't let humidy reduce your indoor air qaulity.
Going all the way with your indoor environment!   Find out what it takes.
Something's in the air - you know it!'   It's not just in your head.
Fresh Air - Keeping those employees conscious   They produce more when they're conscious.
Coils and Hygiene!   A common source of occupant complaints!
Coils, Coils, Coils!   Hygiene, energy efficiency and system longevity. Yes, they are important.
Drain Pans - how to handle   Rusty, corroded condensate pan?
Why air duct cleaning?   Let George Machado explain.
Are dirty ducts adversely affecting your health?   probably.
Understanding Mold

New!

  Buying a House   Is the house you are considering buying mold-free?
Handling Mold   The most effective way to deal with mold is to prevent water from entering the building envelope.
The dose makes the poison   Virtually any mold type can be allergenic to certain individuals.
The Mold Toxin Controversy   Mold spores are everywhere!
Mold Part 1   Nature's Recyclers.
Mold Part 2   Nature's Recyclers.
Tails from the field
Sound Proofing   An IAQ tail of too much sound proofing.
George the legend   George Machado and a new construction odor.
Clean Room Odor   Chasing the cause.
Tight houses   Great for energy efficiency - can be a problem for indoor air quality.
Odors   Unnecessary distractions
Other Topics
Electrostatic Filters   The pros and cons.
Legionaire's Disease Unraveled   Bacteria commonly found in water supplies. Sanitize those swap coolers.
Light Bulbs   Confused about the new laws about incandescent light bulbs?
Listeria Bacteria   Often in the news, find out more.
Cutting Heating and Cooling Costs.   Let technology take control.
Dust mites   They can cause a range of symptoms, find out what to do.
Blow N' Go Duct Cleaners, there IS a difference!
Energy Efficiency   ... a new look.
History of Cool    - how did we get here?
Breathe Free or Die!    - Steve Huff's indoor air quality book
Why Machado's prime contractors look good!
Southern California Molds
Aspergillus   Aspergillus is found under normal conditions in soil, decaying plant debris, compost piles and stored grain.
Penicillium   One species has even been detected in diesel fuel.
Stachybotrys   This is the infamous “black mold”.
Chaetomium   Found in soil, on cellulose materials, including woody and straw components and animal waste.
Ulocladium   Found under normal conditions in soil, animal waste products, grass, paint, paper, textiles, and decaying plant matter.
Cladosporium   Often a secondary invader following Penicillium and/or Aspergillus.
Aurobasidium   This is a yeast-like fungus. Early on it is cream color to pink, but grows much darker with age.
Indoor Air Quality Gases
Ozone   It has an odor generally described as a sharp pungent smell with some similarity to chlorine.
Natural Gas   Methane, Butane, Propane, Pentane and Ethane.
Methane   They add a smell to it so you don't ignore it!
Radon   Radioactive, colorless, odorless. It's a good idea to get it tested for.
Volatile Organic Compunds (VOCs)   New carpet, furniture and paint can off gas VOCs!
Hydrogen Sulfide   Rotten eggs smell, often from sewer gas.
Formaldehyde   Used in the production of pressed wood products like plywood and particle board.
Carbon Monoxide   It is a colorless, odorless gas. It is toxic to humans. It can be deadly at sufficient quantities.
Carbon Dioxide   State of California recommends that CO2 levels remain below 800 ppm.