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46 Years of Experience

Combating Covid-19 in Indoor Public Spaces

Never in a million years did we think 3H AC would be fighting on the front lines of a pandemic, where our technicians are classified as essential workers. We have been improving the indoor air quality in schools and commercial businesses for over 45 years, but this year Covid-19 has increased the urgency to make sure all indoor public spaces have the best ventilation possible.

ASHRAE (American Society of Heating and Air-Conditioning Engineers) created an Epidemic Task Force to study the transmission of SARS-CoV-2 as it travels through the air and found that “changes to building operations, including the operation of heating, ventilating, and air-conditioning systems, can reduce airborne exposures.”

The CDC guidelines recommend the following to improve ventilation in a building:
  • Increase the amount of air coming in from outside
  • Increase the air flow and keep it continuous
  • Increase the air flow and keep it continuous
  • Choose a desired layout from the list
  • Increase air filtration
  • Check exhaust fans
  • Add portable HEPA fan/filtration systems


The CDC also suggests using Ultraviolet Germicidal Irradiation (UVGI) to inactivate potential airborne virus.

ASHRAE developed specific Covid-19 guidelines on how much outside air and how to optimize the HVAC systems, what MERV ratings the filters should be, where to place air cleaners, and more.  Based on the CDC and ASHRAE guidelines, we have customized our Commercial Ventilation checklist to make sure our technicians cover every option available to reduce airborne particles in your building.

3H AC offers the following products and services to improve the indoor air quality in your building:
  • HVAC system, including air handler & coil thorough chemical cleaning
  • Duct cleaning and sanitizing
  • HVAC maintenance to ensure your systems are running at top performance
  • Custom in-house fabricated ducts to re-route air flow if necessary to move more air to different parts of your building
  • Honeywell Electronic air cleaners with HEPA filters
  • ERV (Energy Recovery Ventilator)
  • Add portable HEPA fan/filtration systems
  • UV systems
  • MERV 13 and 5” media filters
  • I-wave Ion generator


3H AC would like to help you make sure your building has the best ventilation possible. We are all in this together and the more buildings that have systems in place to stop the airborne particles, the better off we all are. Call us today for special pricing offered during this pandemic.

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