stdev-advancedenergy,anenergyefficiencyservicesfirm(編輯修改稿)
2025-06-16 18:16 本頁面
【文章內(nèi)容簡介】 Living Room Couch Bedroom Floor Bedroom Bed “Honey, Did You Pack The Dust Mites?” ?Moving from previous to new homes Only bedroom floors showed significant drop in dust mite allergen levels ?Most other allergen levels show no significant changes during next 18 months Dust Mite Levels Previous Residence vs. New Median Der f1, ug/g dust (ELISA assay method) Previous Residence At MoveIn 6 months postmove in Living Room Floor Living Room Couch Bedroom Floor Bedroom Bed Allergens – No Change from Old Home to New Median Alternaria Alternate results ug/g dust, ELISA assay method Previous Residence At MoveIn 6 months postmove in 12 months post move in* Living Room Floor Living Room Couch Bedroom Floor Bedroom Bed Are we diluting chemical asthma triggers? ?Groups very close in size ?Intervention had much tighter ducts (72%) ?Somewhat tighter envelope (25%) ?Intervention adds outdoor air intake (air cycler) to make up for loss of infiltration ventilation ?Add effective spot exhaust ?No source control House and Duct Tightness HOUSE PERFORMANCE VALUES BY INTERVENTION Status Avg duct leakage [CFM25] Duct leakage per ft2 floor Avg house leakage [CFM50] House leakage per ft2 envelope Avg kitchen exhaust [CFM] Avg bath 1 exhaust [CFM] Avg bath 2 exhaust [CFM] Intervention 34 30% 862 106 58 56 NonIntervention 122 104% 1142 0 38 37 % Diff (I from N) 72% tighter 25% tighter n/a 53% higher 52% higher Formaldehyde sampling Formaldehyde Levels – No Statistical Difference Between Groups AVERAGE FORMALDEHYDE LEVELS Status Weight [μg/m3] St Dev [μg/m3] Weight [ppm] St Dev [ppm] I 85 27 N 79 31 All 82 29 Does the ventilation system work? ?Tight intervention houses with outdoor air intake + timer are not higher than leakier non intervention houses ?Met goal of “do no harm” – did not adversely influence the houses when tightening them ?In these houses, mechanical ventilation did not solve the indoor air pollution problem Phase 2 Ventilation ?More precise Air changes per hour Active sampling of formaldehyde ?Measure tight houses with an
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