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2
LEARNING OBJECTIVES
List three contaminants or allergens that are frequently found in house dust and their health effects.
Describe three ways allergens or contaminants get into house dust.
Identify three strategies to reduce them.
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5.1
3
WHY IS CLEAN AND EASILY CLEANABLE IMPORTANT?
Reduce exposure to: Chemical contaminants Allergens Pest droppings and urine Pesticides Heavy metals such as lead and arsenic
Reduced harborage for pests
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5.1
4
ENVIRONMENTAL ALLERGENS
AnimalsDust MitesMoldsTree PollenGrass PollenWeed PollenLatexFoodsStinging InsectsMedications
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5.1
6
Dust mite control• Keep humidity at or below 50% • Wash bedding• Use mattress and pillow
encasements• Freeze soft toys and small items• If possible, replace carpets with
hard surfaces, and remove draperies and upholstery
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5.2
7
WHERE DOES HOUSE DUST COME FROM?
Brought-In
• Lead Dust• Dust Mites
Home-Grown
• Garbage• Clutter
Resident-Made
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5.3
8
BROUGHT IN DUST
Four Steps to ReduceHard Surface WalkwaysOutside Grate-Like MatInside Carpet PadHard Surface Floor
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5.3
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HEALTHY CLEANING Don’t dry dust or dry sweep
Vacuuming:
• Low-emission vacuum with beater bar• Very slowly (or use vacuum with dirt finder)
Wet cleaning:
• Use “elbow grease”• Frequently change water
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5.3
12
MAKE BUILDINGS MORE CLEANABLE
Dust walk-off systems at entrywaysDust-creating activities away from people.Smooth, cleanable surfacesEffective storage spaceFlooring that is easy to cleanVacuums with good filtration and easy to use
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5.4
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HOW CLEAN IS CLEAN?
Clearance testing for lead40 micrograms of lead per square foot on floors250 micrograms of lead per square foot on window sills.
Standards for allergens?Standards for dust?
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5.6
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PROBLEMATIC CLEANING MEASURES
Carpet cleaningOveruse of anti-microbialsSanitizersAir fresheners
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5.6
20
DUCT CLEANING
EPA recommends duct cleaning when:
• Substantial visible mold• Ducts infested• Ducts clogged• Ducts release particles
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5.6
21
CLUTTER
What’s the problem? What do we do to help? Organize home,shelves and storage bins. Hoarding? What’s the psychological aspect of this?
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5.6
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CODE REQUIREMENTS
305.1
• General
302.1
• Sanitation
307.1
• Accumulation of rubbish or garbage
503.4
• Floor surface
Code requirements related to cleanliness
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5.7
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KEY MESSAGES
Pesticides, allergens, and general chemicals in the home can cause allergic reactions, asthma and asthma exacerbation, and toxic exposure effects.
Potential sources of allergens and contaminants in the home come from outdoor and indoor sources.
Keeping a home clean includes controlling the source, creating smooth and cleanable surfaces, reducing clutter, and using effective cleaning methods.
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5.8