Other Air Treatments

Appendices in the Guideline for Disinfection and Sterilization in Healthcare Facilities (2008)

Vigorous and rapid air exchanges might not always be a good thing when it comes to levels of coronavirus particles in a multiroom building, according to a new modeling study.

EPA recommends precautions to reduce the potential airborne transmission of the virus, such as ventilation and air filtration as a part of a larger strategy that includes minimizing close contact, surface cleaning, handwashing, and other precautions.

"Four House committee chairs say they have "serious questions" about the adequacy of the CDC's guidance on workplace protection from aerosol transmission." "For the last two weeks, scientists, experts and unions have been prodding the administration to be more specific about guidance on exposure to small aerosol particles that carry COVID-19, which they say the CDC's official guidelines downplay. " "If an emergency temporary standard is deemed necessary by OSHA, it would be the first enforceable nationwide standard for face masks in America's workplaces. "

"With prehumidification, recovery rates (± standard deviations) were much higher for nonenveloped viruses (T7 coliphage, 28% ± 19% with prehumidification versus 0.02% ± 0.01% without prehumidification; poliovirus, 29% ± 5% versus 3.2% ± 1.8%) but were unchanged for enveloped viruses (Semliki Forest virus [SFV], 32% ± 7% versus 42% ± 8%; Langat virus, 42% ± 10% versus 51% ± 12%) Benbough attributed the inactivation of nonenveloped viruses to structural rearrangement during abrupt rehydration in the impinger collection medium and suggested that slower rehydration rates, such as those experienced during the prehumidification process, were more favorable for polioviruses and coliphages" "Viruses that partition on the surface of aerosols may be subject to damage due to surface tension, shear stress, and conformational rearrangement driven by hydrophobicity." "Results showed that enveloped viruses lost infectivity dramatically (up to four orders of magnitude) due to aeration, while the nonenveloped ones did not." "Higher RH allows for larger final aerosol size and larger surface area due to less evaporation and, thus, greater potential for surface inactivation of hydrophobic lipid-containing viruses (i.e., enveloped viruses). Nonenveloped viruses are less likely to be affected." "While salts appear to be toxic to enveloped viruses, addition of salts to the medium has been shown to improve rather than reduce the viability of nonenveloped viruses... Benbough (1) suggested that salts can slow the rehydration process ... and thus reduce the chance of structural rearrangements that can be damaging in the capsid of nonenveloped viruses. Our interpretation of the enhanced viability is that salts can keep the aerosol and the virus in it from drying out completely at RHs above the ERH and thus reduce the chance of unwanted structural rearrangements during rehydration. This effect would benefit the nonenveloped viruses that need to retain their structural water; meanwhile, they are not susceptible to damage by salts, as are enveloped viruses."

"Some experts, including us, are encouraging that the hospitalized patient with COVID-19 spend as much time as is feasible and safe in the prone position while receiving oxygen or noninvasive modalities of support such a high flow oxygen delivered via nasal cannulae (HFNC) or noninvasive ventilation (NIV)." "Nebulizers are associated with aerosolization and potentially increase the risk of SARS-CoV-2 transmission.... If nebulized therapy is used, patients should be in an airborne infection isolation room, and healthcare workers should use contact and airborne precautions" "For patients with COVID-19 who are intubated...we prefer the use of in-line metered dose inhalers (MDIs; ie, pressurized inhalers) rather than administration via a standard jet or vibrating mesh nebulizer due to the lower risk of aerosolization"

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{Effects of "white dust" from humidifiers}

"AerosolSense Sampler, a new surveillance solution designed to deliver fast and highly reliable insight into the presence of in-air pathogens, including SARS-CoV-2."

I have asked two times the following question:I want to calculate the gas concentration, in ppm, in the closed chamber of volume 1025 cm3. I have a cylinder of mixture of NH3 and air with the 10...

{Using Ozone} Whereas some governments are heeding the advice of the Ministry of Health and removing coronavirus sanitization tunnels, others are moving ahead with them.

Welcome to “sanitization theater.”

{Includes benefits of electrostatic sprayers} Electrostatic sprayer was 29-times better than the conventional sprayer in depositing the active ingredient onto the backside of the target" "75% less disinfectant wastage" "Solutions applied via an electrostatic sprayer were found to be better able to encapsulate and inactivate the inoculated pathogen directly on the surface"

Solo CLEANLine One-Hand and Handheld Sprayers Cleanliness can make or break a business. Whether you're a school janitor, a hotel manager, or restaurant owner...

Information on Improving Air Quality in Your Community

Find out how clean air benefit your workplace, people and processes across all industries.

The benefits of cold fogging and how to implement it into your practice.

LG Household & Health Care, South Korea’s leading maker of household goods, said Wednesday that its humidifier disinfectant sold back in the late 1990s did contain potentially harmful chemicals, but that they were used in small amounts that would not cause damage.　Earlier in the day, local news agency Newsis had reported that LG’s “119 Humidifier Disinfectant” product sold from 1997 to 2003 had contained benzalk...

Bipolar ionization technology emits charged particles that attach to and deactivate harmful substances like bacteria, allergens, mold, and viruses.

PDF | The humidifier disinfectant disaster (HDD) was not a simple poisoning accident by biocides, but a singular disaster in history created by... | Find, read and cite all the research you need on ResearchGate

[**Side thought: Contaminated or high-mineral (or high turbidity) local may be detrimental even in spray bottles!!} The U.S. Department of Energy's Office of Scientific and Technical Information

Testing is needed beyond just for minimum approval, and needs to be application-type specific.

Only if you clean them often—we’re talking daily—can you breathe easy.

no CD nor sprays into air

Evaluation of effectiveness of various methods

This article aims to draw the attention of the scientific community towards the elevated risks of airborne transmission of diseases and the associated risks of epidemics or pandemics. The complexity of the problem and the need for multidisciplinary research ...