Learning Objectives Page 71 Why Well Ventilated Page 71 Why Well Ventilated Page 71 Why Well Ventilated Page 71 Type of Heating Fuel Water Heater 543 have gas LPbottled gas ID: 776162
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Slide1
Keep itventilated
Steps to Healthier Homes
Slide2Learning Objectives
Page
7.1
Slide3Why Well Ventilated?
Page
7.1
Slide4Why Well Ventilated?
Page 7.1
Slide5Why Well Ventilated?
Page 7.1
Slide6Type of Heating Fuel
Water Heater54.3% have gas, LP/bottled gas41.3% have electricityClothes Dryer21.8% have gas, LP/bottled gas78.1% have electricity From American Housing Survey – 2011
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7.1
Slide7Primary Heating Equipment
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7.1
From American Housing Survey – 2011
For their primary source of heat!
Slide8Heating Problems
9.1% were uncomfortably cold for more than 24 hours12.5% for renters13.7% for residents below poverty level1.1% were uncomfortably cold for at least 24 hours due to inadequate heating capacity2.0% for renters 2.2% for residents below poverty level1.1% were uncomfortably cold for at least 24 hours due to inadequate insulation 1.8% for renters2.0% for residents below poverty level
Page 7.2
From American Housing Survey – 2011
Slide9Sources of Combustion Contaminants
Oven as heaterSpillage from furnace, water heater, fireplaceVentless heater or fireplaceCar exhaust from attached garage
Page
7.2
Slide10Combustion Contaminants?Health Effects
Carbon Monoxide Fatigue, headaches, dizziness, confusion The “Silent Killer” Nitrogen Dioxide Eye, nose, and throat irritation Shortness of breath
Page
7.2
Slide11Carbon Monoxide Limits
AgencySituationMaximum CO LevelDurationEnvironmental Protection Agency (EPA)Outdoor / Ambient Air9 ppm8 hours35 ppm1 hourConsumer Products Safety Commission/Underwriter Laboratories (UL)Alarms for Immediate Life Threats in Residential Air70 ppm1 - 4 hrs150 ppm10 - 50 min400 ppm4 - 15 minCanadian Department of National Health & WelfareAir in Residences11 ppm8 hours25 ppm1 hourWorld Health OrganizationIndoor Air 32 ppmMax.
Page
7.3
Slide12Carbon Monoxide Alarms
Combination
smoke
and CO alarm
Page
7.3
Slide13CO Alarm Installation
Page
7.4
Slide14Why Ventilated
Health Effects
Page 7.5
Approximately 500 carbon monoxide deaths plus more than 15,000 non-fire related healthcare visits per year.
Slide15Why Ventilate
Higher rates of respiratory irritation and illness in housing with poor ventilationCommon coldsInfluenzaPneumoniaBronchitis
Health effects
Page 7.5
...and
increased rates of absence from school or work
Slide16Well ventilated?
Page
7.6
Slide17A Well-Ventilated Building?
Page
7.6
Slide18Good Building Ventilation Provides:
Page
7.6
Slide19Understanding Ventilation
If any portion of air leaves a house the same amount will enterAir like water seeks the path of least resistanceWhen heated, air risesWhen cooled, air fallsAir can be hot, cold, wet, dry, or polluted when it enters or exits a house
Key Concepts
Page
7.7
Slide20What Powers Air Flow?
Wind
Fans
Temperature differences
Page
7.7
Slide21Air Flow in Homes
Typical homes do not have a planned supply of fresh air. We depend on leakage such as windows, doors, and cracks.This is usually not adequate.
Page
7.8
Slide22Air Flow Needs Designed Holes
Fresh air
inlet/outlet
Ventilation intake
and exhaust
Bath and kitchen
exhaust vents
Combustion
vents
Dryers
Central vacuum outlet
Chimneys
Page
7.8
Slide23Multi-family dwellings should have
planned
fresh
air supply because:Neighbors are closer together Stack effect- this dominates in cold weather
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7.9
Slide24Multi-family exhaust only – new construction
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7.9
Slide25What are we looking for?
Bath, dryer, and range exhaust fans?Gas stove used as heater? Windows work?Smoke alarm goes off?Unvented gas or kerosene heaters?Vented hot water heater?Furnaces, boilers, fireplaces vented?Rooms without windows?Lingering odors?Stale air?Windows fog?
Page
7.9
Slide26Things that Need Exhaust Ventilation
BathroomsKitchen rangesClothes dryers Boilers, furnaces, hot water heatersFireplaces, wood burning stoves
Page
7.10
Slide27Is there an exhaust in the bathroom?
Does it work?
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7.10
Slide28Testing Exhaust Fan:The Charmin Method
Page
7.11
Slide29Ducted ok?
Damper work?
Page
7.11
Slide30Local Ventilation: Kitchen
Page
7.11
Slide31Page
7.11
Slide32Page
7.12
Slide33Page
7.12
Slide34Does
this look bad
?
Page
7.13
Slide35Page
7.13
Slide36Poorly sealed filter access panel
Page
7.14
Slide37MERV- Filter Rating System
Minimum Efficiency Rating Value (MERV)ASHRAE Standard 52.2 – Efficiency in collecting very small particles
Page
7.15
Slide38Merv Ratings
MERV RatingsMERVParticle sizeTypical controlled contaminant1-4 >10.0 Pollen, sanding dust, textile and carpet fibers5-83.0-10.0Mold, spores, hair-spray, cement dust9-121.0-3.0Legionella, lead dust, welding fumes 13-160.3-1.0Bacteria, most tobacco smoke, insecticide dust, copier toner17-20 0.3Virus, combustion particles, radon progeny
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7.14
Slide39MERV 8 vs. 10
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7.15
Slide40Other Rating Systems
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7.16
Slide41And . . .
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7.16
Slide42Code Requirements
Code requirements related to ventilation
Page
7.17
Slide43Code Requirements
Code requirements related to ventilation
Page
7.17
Slide44Code Requirements
Code requirements related to ventilation
Page
7.17
Slide45Key Messages
Ventilation plays an important role in maintaining health.Ventilation is necessary to remove humidity and dilute or remove contaminants. Local exhaust ventilation removes contaminants from a point source, while whole house ventilation uses fresh air to dilute contaminants.
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7.18
Slide46Learning Objectives
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7.18