Archive : May

Making HVAC Systems Infection Free

 Cooling and heating contractors Hamilton are now in demand to help inspect, maintain and clean to make the HVAC systems operate efficiently with less cost.

For any residential, commercial or industrial property, indoor air quality has never been more crucial. Disinfecting and cleaning the HVAC conveyance systems is becoming a norm, and it covers all associated ductless split systems and duct work. Cooling and Heating Contractors Hamilton are now in demand to help inspect, maintain and clean to make the HVAC systems operate efficiently with less cost. Find the full list here about the differences in HST, PST, and GST that will help you successfully register your business to import and export goods for HVAC systems. The cycle for regular maintenance of these systems is on a decrease, especially during this pandemic.

Some studies confirm that droplets from human cough or sneeze can disperse small nuclei into the air up to 12 feet and linger for a minute and more. The duct systems easily sucks the viral particles initiating a transmission through air-conditioned ventilation. Studies also indicate that infected particles will persist in the air for hours, and on surfaces, they may likely remain for two days. The most persistent surfaces are plastic and steel. Moreover, the viruses can easily spread through fibres, dust and other particles infecting the air.

HVAC duct work is made of metal and can collect fine dust on motors, vents and surfaces. This dust can easily combine with flakes of hair, dead skin, and pet dander to form a mat of dense material on which mould, dust mites, allergens, bacteria and viruses can flourish. The more dust in the air, the more the amount of dust on surface. Air filters do help in filtering viral particles from air and dust. However, coronavirus particles are 0.1 microns, and there is no surety that even the top-quality air filters will stop these viral particles.

Nevertheless, based on research and studies, regular inspection, cleaning, disinfecting, testing, and air sampling, the HVAC systems and duct work can prevent coronavirus transmission. Some of the best practices that will help you maintain HVAC systems are discussed here.

  • Review the diagrams and drawings of HVAC systems and duct works.

  • Perform inspection of the interior and exterior of the HVAC system, duct work, filters, coils and motors.

  • Use a PPE kit while doing the inspection.

  • Test for leakages, VOC particles and issues in the metal seam.

  • Conduct pre and post swab sampling of all the surfaces associated with the system. It will help identify hazardous particles.

  • Conduct air sampling of the designated area. It will help identify the infected areas.

  • Follow protocols and assess risk for cleaning, disinfecting and isolating activities. It will help control infections and protect the environment.

  • Use non-chlorine, non-acidic based EPA registered fungicide, biocide, and virucide disinfectant along with ultra-low volume fogging to clean in and out of duct work, coils, motors, vents, registers and metal interiors.

  • Allow a minimum dwell time of 10 minutes or as specified by the disinfectant.

  • Conduct air whipping, roto brushing and HEPA vacuuming to clean large dust particles from the interior surfaces.

  • Install new filters even if it is a washable filter. Clean these washable filters with EPA registered disinfectant.


You must practice a routine schedule to keep your HVAC systems well maintained to provide an infection-free air environment.