Indoor Air and Coronavirus (COVID-19)

COVID-19 is thought to spread mainly through close contact from person-toperson. However, some uncertainty remains about the relative importance of different routes of transmission of SARS-CoV-2, the virus that causes coronavirus disease 2019 (COVID-19). Evidence now confirms that this virus can remain airborne for longer times and further distances than originally thought. In addition to close contact with infected people and contaminated surfaces, spread of COVID-19 may also occur via airborne particles in indoor environments, in some circumstances beyond the 2 m (about 6 ft) range encouraged by some social distancing recommendations. See Science and Technical Resources related to Indoor Air and Coronavirus (COVID-19) or Indoor Air and COVID-19 Key References and Publications for technical information.

There are straightforward steps that can be taken to reduce the potential for airborne transmission of COVID-19 and the focus of this material is on those measures. The layout and design of a building, as well as occupancy and type of heating, ventilation, and air conditioning (HVAC) system, can all impact potential airborne spread of the virus. Although improvements to ventilation and air cleaning cannot on their own eliminate the risk of airborne transmission of the SARS-CoV-2 virus, EPA recommends increasing ventilation with outdoor air and air filtration as important components of a larger strategy that includes social distancing, wearing cloth face coverings or masks, surface cleaning and disinfecting, hand washing, and other precautions. By themselves, measures to reduce airborne exposure to the virus that causes COVID-19 are not enough since airborne transmission is not the only way exposure to SARS-CoV-2 could potentially occur.

Hypochlorous Acid

An ideal disinfectant and sanitizer must be nontoxic to surface contact, noncorrosive, effective in various forms, and relatively inexpensive. HOCl may be the disinfectant of choice for coronaviruses in an office.

No Air Handler Job Too Difficult

With the need of increased air flow and make up air, sometimes it takes slight modifications that are difficult in certain applications.
Our crew has both the experience and knowledge to perform these projects.  Some of these modifications are necessary in school staffing offices and other critical areas.


Once the air reaches the filters carrying bacteria, the UV/LED lamps will assure that the bacteria is eliminated at the filter which would solve two problems. One: not allowing bacteria to continue within the system Two: ability for the service tech to remove filters that are now sterilized. The combination of increasing the filter Merv rating and evaluating the system’s ability to perform with a higher rated filter will ensure proper air flow over the coil system.

How many microns in size is the COVID-19 virus?

The COVID-19 virus is approximately 0.125 Micron or 125 nanometers in diameter. (Source: National Library of Medicine)
However, it often travels in biological aerosols from coughing and sneezing which range in size from 0.5-3 Micron.
Face Masks of the HVAC realm are the “new normal”.  The fact that viruses can be airborne, higher MERV filters can trap them.
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Sharp Cooling Tower Cleaning

Normally we clean Cooling Towers during low ambient conditions in the fall and spring time.  As soon as this project was approved, our Team was able to start Cooling Tower Cleaning during the first 2020 heat wave in SoCal. This required precise execution with the Hospital engineering staff and our Technician staff to keep Central Plant Chillers online while we took down three Cooling Towers at a time. The Cooling Towers were extremely dirty and could have caused the Central Plant Chillers to surge and possibly lock out on Condenser Water.

The Resort at Pelican Hill

Who’s there for you when you have an emergency with Axial Fans? RAM HVAC & Engineering of course! We were proud to save the day over at The Resort at Pelican Hill last week. We found the bearings needed replacement and so we made that happen in the same business day. We know how important it is to have your Axial Fans working and if they do break, to have them up and running quickly.