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4.0 RESULTS

4.1 NOMINAL PARTICLE REMOVAL EFFICIENCY

The boilerplate atom abatement efficiencies for anniversary in-duct air cleaner are abbreviated in Table 4.1. The abatement ability after-effects for alone tests are archival in Appendix A. Note that because the afterwards altitude was taken from a accumulation duct, the abatement efficiencies appear actuality cover filtration as able-bodied as degradation of particles aural the AHU.

Eight humans were sickened Tuesday afterwards architecture workers accidentally appear carbon monoxide in their building.

Montgomery County Fire agent Pete Piringer tells WTOP Radio the effluvium congenital up as the workers were application gasoline powered accoutrement at an accommodation circuitous in the 5400 block of Wisconsin Avenue.

Piringer says the humans accomplished they were activity ailing afterwards a carbon monoxide anxiety went off. Carbon monoxide contagion affection are generally mistaken for the flu.

The architecture was partially evacuated, but association were accustomed aback in afterwards the architecture was ventilated.

Two woman was taken to the hospital as a precaution, but Piringer says others were activity bigger afterwards accepting some beginning air.

(Copyright 2005 by WTOP Radio. All Rights Reserved.)

CHEVY CHASE, Md. -- Two humans were sickened Tuesday afterwards architecture workers accidentally appear carbon monoxide in their building.

Montgomery County Fire agent Pete Piringer tells WTOP Radio the effluvium congenital up as the workers were application gasoline powered accoutrement at an accommodation circuitous in the 5400 block of Wisconsin Avenue.

Piringer says the humans accomplished they were activity ailing afterwards a carbon monoxide anxiety went off. Carbon monoxide contagion affection are generally mistaken for the flu.

Removal ability was anon accompanying to atom admeasurement for a accustomed air cleaner. With the 1-inch in-duct filter, beneath than 1% of particles beneath 0.5 μm were removed, 3% of particles amid 0.5 & 1 μm, 21% of particles amid 1 & 3 μm, 55% of particles amid 3 & 5 μm, 74% of particles amid 5 & 10 μm, & 79% of particles amid 10 & 20 μm. A agnate trend was empiric for anniversary of the added in-duct air cleaners, although the ambit of ability beyond atom admeasurement bins differed a part of air cleaners. For instance, abatement ability beyond atom admeasurement bins was a lot of constant for Trane CleanEffectsâ„¢/American Accepted AccuCleanâ„¢ compared to added in-duct air cleaners, capricious from 90.1% for 0.3 – 0.5 μm aerosols to 98.4% for 5 – 10 μm aerosols.

The nominal abatement ability assorted a part of air cleaners for a accustomed atom admeasurement as well. The in-duct air cleaners ranked from accomplished to everyman abatement ability for a accustomed atom admeasurement are as follows: Trane CleanEffectsâ„¢, EAC, 5-inch, & 1-inch. This

Environmental Health & Engineering Project #13603 Accomplished Abode Air Cleaning Process Page #26

rank adjustment is a lot of credible for the 0.3 – 0.5 μm admeasurement bin area the abatement efficiencies are about 90%, 40%, 15%, & 0%, respectively. The differences a part of in-duct air cleaners were abate for the beyond atom admeasurement bins although the rank adjustment was preserved.

4.2 WHOLE HOUSE AEROSOL REMOVAL RATE AND CLEAN AIR DELIVERY RATE

4.2.1 Accomplished Analysis Dust

The boilerplate accomplished abode atom abatement ante bent from tests with the accomplished dust accepted are abbreviated in this section. After-effects for the 10 – 20 μm particles are not presented because the atom amount concentrations were low & could not be quantified precisely.

Overall, the greatest accomplished abode atom abatement ante a part of the in-duct & carriageable air cleaners were empiric for Trane CleanEffects™. Referring to after-effects based on atom amount concentrations abstinent by the Climet accessory abreast the HVAC acknowledgment (Table 4.2), the boilerplate kac of 0.3 – 0.5 micron particles for Trane CleanEffects™/American

-1

Standard AccuCleanâ„¢ was 7.2 per hour (hr ). The next greatest kac in the 0.3 – 0.5 μm

-1

range was accomplished by the cyberbanking air cleaner (4.6 hr ). A individual HEPA-filtered carriageable

-1 -1

air cleaner (1.4 hr ) & an in-duct 5-inch clarify (1.5 hr ) had about identical kac for

0.3 – 0.5 micron particles. Operation of 5 HEPA-filtered carriageable air cleaners produced a accomplished abode abatement amount (3.9 hr-1) for 0.3 – 0.5 micron particles that approached the achievement of the EAC but was 3.3 hr -1 lower than Trane CleanEffects™. Representative adulteration curves for Trane CleanEffects™/American Accepted AccuClean™ against the added in-duct air cleaners & carriageable air cleaners are apparent in Figures 4.1 & 4.2.

Examination of the actual portions of Table 4.2 shows that Trane CleanEffectsâ„¢/American Accepted AccuCleanâ„¢ accomplished the greatest abatement amount for anniversary admeasurement area of particles. The 5-10 micron atom ambit was an barring area 5 carriageable HEPA units produced a atom abatement amount hardly greater than Trane

TM

CleanEffects . Operation of 3 carriageable ionic air cleaners yielded a abatement amount that

-1

ranged from 0 to about 1 hr depending on atom size.

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WHCADR for anniversary aggregate of air cleaner & atom admeasurement is aswell abbreviated in Table

4.2 & is anon accompanying to accomplished abode kac. In the 0.3 – 0.5 μm section, Trane CleanEffectsâ„¢/American Accepted AccuCleanâ„¢ had an boilerplate WHCADR of 1,171 cfm, compared to the next accomplished WHCADR of 750 cfm accomplished by the EAC. Operation of a individual HEPA-filter carriageable air cleaner produced an boilerplate WHCADR of about 230 cfm.

Detailed advice on the atom abatement amount & accompanying ambit for anniversary analysis are presented in Appendix D. As apparent in Appendix E, accomplished abode atom abatement & tidy air supply ante bent from the APS abstracts in the dining allowance were agnate to those acquired from the Climet accessory with which it was collocated. Note that APS after-effects for the 5 – 10 μm area are anticipation about capricious because of the low atom counts & little amount of tests for which adulteration ante could be estimated.
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