At Home In Berks Fall 2021 - 34

COMMERCIAL & RESIDENTIAL
Ultraviolet Germicidal Irradiation
UVC has been proven to kill microorganisms, given the
proper dosage. Typical application of UVC is to irradiate
the cooling coil on an HVAC system. This prevents
microorganisms from growing on the surface of the coil.
Effectiveness on moving air is highly dependent on the
intensity of the UV light and the velocity of the passing air
and can be increased through the best practices indicated in
the UVC installation instructions. YORK® offers UVC kits in
single and dual light packages.
Humidity Control
Both Humidification and Dehumidification maintaining
proper humidity levels can reduce number of airborne
particles by preventing human nasal passages from drying
out and capturing small particles. Keep the home's Relative
Humidity between 40% & 60% (RH Range).
Viruses are least viable within the RH Range by
minimizing large droplet evaporation and preventing small
particle formation.
Ventilation
Supplying clean air from outdoors will displace/dilute
contaminated indoor air. Homes equipped with a ventilation
system have fresh air from the outdoors introduced through
the HVAC system using a preset control strategy. Running a
home's exhaust fans can also help remove airborne particles.
References
American Society of Heating, Refrigerating and AirConditioning
Engineers (ASHRAE). Airborne Infectious
Diseases, Position Document. Atlanta: ASHRAE, approved
January 19, 2014; reaffirmed February 5, 2020.
Energy Standard for Buildings Except Low-Rise Residential
Buildings, ANSI/ASHRAE/IES Standard 90.1-2019. Atlanta:
ASHRAE, 2019.
Thermal Environmental Conditions for Human Occupancy,
ANSI/ ASHRAE Standard 55-2017. Atlanta: ASHRAE, 2017.
Ventilation for Acceptable Indoor Air Quality, ANSI/
ASHRA Standard 62.1-2019. Atlanta: ASHRAE, 2019.
Ventilation and Acceptable Indoor Air Quality in Low-Rise
Residential Buildings, ANSI/ASHRAE Standard 62.2-2019.
Atlanta: ASHRAE, 2019.
Institute of Environmental Sciences and Technology
(IEST). HEPA and ULPA Filters, IEST PR-CC001.6.
Arlington Heights, IL: IEST, 2016.
Supplied by YORK® Brand Johnson Controls
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FALL 2021 AT HOME IN BERKs
17
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At Home In Berks Fall 2021

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