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VENTILATION

COVID-19 STATEMENT FROM AIR THERMAL, INC                   

To help prevent Covid-19 from spreading in Homes, Businesses, and Schools, Air Thermal, Inc. recommends using UV light and Ionization technology to neutralize the virus throughout HVAC Systems – the test results can be seen at:                     

https://www.rgf.com/test-results/

Enclosed areas without ventilation are the most vulnerable in the spread of molds, bacteria, and viruses throughout HVAC Systems; in addition, ductless HVAC Systems, such as mini-splits and PTACs (Packaged Terminal Air Conditioner) also circulate molds, bacteria, and viruses including Covid-19 and its variants, especially when relative humidity levels are higher than 50 to 60% ª, which is the comfort level for humans -- Especially worrisome are non-ventilated elevators, non-ventilated houses & buildings that are subjected to SBS (Sick Building Syndrome) and BRI (Building-Related Illnesses), vehicles, airplanes, transport buses, bars, and restaurantsᵇ.

More Importantly, even ventilated homes and buildings are subjected to Airborne Contaminates, like, molds, bacteria, and viruses that are scaled down to 0.1 μm (Covid-19 & SARS-CoV-2 is an enveloped virus ≈ 0.1 μm)ᶜ; CO² molecules, for example, are 0.33nm in diameter – several orders of magnitude smaller than ALL CORONAVIRUSES and readily circulate throughout HVAC Systems, as well as Ventilation Systems and, as a result, are a concern for Ventilation Engineers for building occupants that might enter ventilation systemsᶜ (bars and restaurants provide less transmission of viruses when outside and social distancing is practiced because you're in a well-ventilated environment, but you're still exposed at a reduced risk); for these reasons, masks and eyeglasses should be worn to mitigate transmission, according to CDC guidelines -- MOST viruses and bacteria detrimental to humans prosper in high humid environments, such as your lungs -- relative humidity levels of and below 50 to 60% have been shown to suppress bacteria and viruses on surfaces harmful to peopleª, as well as sunlight exposure while maintaining social distancing -- One technology that has been documented in University Case Studies (Link Below) funded by the CDC (Center for Disease Control and Prevention) to reduce molds, bacteria, and viruses are self-cleaning ionizers, carbon fiber brushes, and ultra-violet light utilizing an enhanced zinc ceramic catalyst for superior bacteria and virus reductionᶜ; in fact, this technology, along with HEPA filtration is used in hospitals, schools, medical facilities, planes, and residential homes to mitigate mold, bacteria, and virus transmission in humans.

Richard E. Lelli, P.E. – HVAC & Refrigeration / Fluid & Thermal Systems Engineer                                                                                                                                                                                                                                        

At Air Thermal, we take Indoor Air Quality to another level, and we believe that Ventilation is an important discipline in the HVACR industry -- IT NOT ONLY EFFECTS OUR HEALTH IN OUR HOMES & BUSINESSES BUT ALSO INFLUENCES OUR PRODUCTIVITY. We offer a full range of ventilation products & services for residential customers, condominiums, convenience stores, supermarkets, restaurants, schools, health care organizations, and government facilities to ensure health and comfort.

Energy Recovery Ventilators - Energy Recovery Ventilators (ERV) utilize the outside air to enhance the indoor air quality of an occupied space while controlling humidity and lowering utility bills:

Unit Ventilators & Makeup Air Units - unit ventilators also use outside air to condition offices, schools, and buildings; makeup air units are used to condition ventilated air or replace exhausted air:

Humidification - Humidification control in our homes & businesses is important to prevent bacteria, fungi, viruses, and other organisms from becoming active.

Duct Cleaning - Air ducts in our homes & businesses are often the main source of mold and indoor contaminates that hinders the efficiency of the air conditioning system.

REFERENCES:

a – ASHRAE (American Society of Heating, Refrigeration, and Air Conditioning Engineers). 2018 ASHRAE Handbook – Refrigeration Ch 22.3 - 22.4                                                                                                                      ASHRAE -- Virus Transmission Modes and Mitigation https://www.ashrae.org/technical-resources/ashrae-journal/featured-articles/virus-transmission-modes-and-mitigation-strategies-part-3-ventilation-filtration-and-uvgi        ASHRAE -- Mitigating Airborne Infection Transmission with HVAC Systems https://www.ashrae.org/news/ashraejournal/mitigating-airborne-infection-transmission-with-hvac-systems

b – 2005 ASHRAE Handbook – Fundamentals Ch 9.2 - 9.3 – Illnesses Related to Exposure in Buildings; 2007 ASHRAE Handbook – HVAC Applications                                                                                                                   ASHRAE -- Virus Transmission Modes and Mitigation https://www.ashrae.org/technical-resources/ashrae-journal/featured-articles/virus-transmission-modes-and-mitigation-strategies-part-3-ventilation-filtration-and-uvgi                                                                                                                                                                                                                                                                                                                                                                      ASHRAE -- Mitigating Airborne Infection Transmission with HVAC Systems https://www.ashrae.org/news/ashraejournal/mitigating-airborne-infection-transmission-with-hvac-systems

c – https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7224694/

2005 ASHRAE Handbook – Fundamentals Ch 9.4 - 9.7; Ch 12.1 – 12.19 – Air Contaminates; 2018 ASHRAE Handbook – Refrigeration Ch 22.3 - 22.4                                                                                                                     ASHRAE -- Virus Transmission Modes and Mitigation https://www.ashrae.org/technical-resources/ashrae-journal/featured-articles/virus-transmission-modes-and-mitigation-strategies-part-3-ventilation-filtration-and-uvgi                                                                                                                                                                                                                                                                                                                                                                  ASHRAE -- Mitigating Airborne Infection Transmission with HVAC Systems https://www.ashrae.org/news/ashraejournal/mitigating-airborne-infection-transmission-with-hvac-systems