Top 10 Issues in Building Science Terry Brennan – Camroden Associates Why Buildings? Why Buildings? • A way to transport a dry Mediterranean climate to every god ‐ forsaken ‐ spot on the planet (and space as it turns out) • Keep out annoying creatures • A place to put my stuff
Top 10 Issues in Building Science Terry Brennan – Camroden Associates Make a building • Make an enclosure • Add Heating, cooling, dehumidifying, humidifying • People (and their stuff) move in and the fun begins Still moldy after all these years
Top 10 Issues in Building Science Terry Brennan – Camroden Associates Studies Link Dampness and Mold to Significant Respiratory Problems and to High Costs of Medical Treatment • Meta ‐ Analyses of the Associations of Respiratory Health Effects with Dampness and Mold in Homes • Public Health and Economic Impact of Dampness and Mold ‐ Indoor Air Journal • 30 percent to 50 percent increase in respiratory and asthma ‐ related health outcomes. • ~4.6 million of the 21.8 million reported cases of (21 percent) linked to dampness and mold in homes. • ~ $3.5 billion to treat asthma linked to dampness and mold in homes. • Keep it dry. Make Existing Houses Energy Efficient
Top 10 Issues in Building Science Terry Brennan – Camroden Associates Indoor ozone – it brings good things to life • Breaks double carbon bonds – turns some VOCs into more VOCs • In airplane study people were the biggest source of ozone reaction VOCs – Wargocki • 3 meta ‐ studies – 0.85% increase mortality for each 10ppb increase ozone – Weschler • BASE analysis links ozone to 33% ‐ 45% reported symptoms – Apte • Unpainted gyp board soaks up ozone • Ozone plus VOC ‐ bad Off Shore Products • Lead paint – toys, toys, toys • Illegal pesticides – still out there • Formaldehyde – 10 ply plywood • 130 ppb – 350 ppb closets – 900 ppb highest – Bailey • CARB study ‐ offerman
Top 10 Issues in Building Science Terry Brennan – Camroden Associates Sanitizers, disinfectants and pesticides • EPA and pesticide use in ductwork • 39,000 injuries from household bleach 2oo4 Poison Control Centers • Resistant staph • Guidelines for Environmental Infection Control in Health ‐ Care Facilities ‐ CDC
Top 10 Issues in Building Science Terry Brennan – Camroden Associates Maintenance ‐ cleaning Windows are not a reliable source of ventilation – bud offerman Survey of Ventilation Behavior and Housing Characteristics in New California Houses
Top 10 Issues in Building Science Terry Brennan – Camroden Associates Radon and humidity control ‐ brad 120 100 Block Wall Equilibrium RH (%) 80 60 40 Interior Core Thru Wall 20 ASD Full (On/Off) ASD Single-Pipe (On/Off) 0 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 7 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 / / / / / / / / / / / / / / / / 5 4 4 3 2 4 3 3 2 2 1 0 0 9 9 8 1 1 1 1 1 1 1 1 1 1 1 1 1 / / / / / / / 1 2 1 0 1 2 1 / 2 / 3 / 4 / 5 / 6 / 7 / 8 / 9 / 0 1 1 1 1 1 1 Combustion from unvented fireplaces P. Francisco 7 of 15 houses greater than 250 ppb NO2 (Canadian threshold) 11 of 15 greater than 110 ppb (WHO threshold)
Top 10 Issues in Building Science Terry Brennan – Camroden Associates CO and generators Filters • Filter efficiency (MERV) • MERV applies to media filters • Filter bypass – if it doesn’t go through the filter it doesn’t get filtered
Top 10 Issues in Building Science Terry Brennan – Camroden Associates Cures consumption, shakes, rheumatis’ and foul humours of the blood… • Fine Particles • a 10 mg/m3.rise in PM10 is associated with a 1% increase in mortality • 10 mg/m3 rise in PM10 hospital admissions for asthma rise by ~2%
Top 10 Issues in Building Science Terry Brennan – Camroden Associates Activities and Resuspended Particles from Ferro et al Environmental Science and Technology 2004, 38 90 80 Particle Concentration (ug/m3) 70 60 50 Walk on rug 40 30 Dance on rug Dance on wood 20 10 0 0 1 2 3 4 5 Time (hours) Vacuum dust curve-kasara 50 40 Bag Weight (Grams) 30 20 10 0 0 10 20 30 40 50 Time (minutes)
Top 10 Issues in Building Science Terry Brennan – Camroden Associates Border Communities Miller ‐ Shaughnessy – Turk
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