Importance of Air Duct Cleaning in Fighting the Spread of COVID-19

Dirty HVAC ducts can help infectious viruses, bacteria, and other harmful microorganisms propagate. While COVID-19 is primarily transmitted through direct contact with infected individuals, such as through droplets and via surface contact, recent evidence has shown that dirty ventilation systems may also increase the risk of transmission. This is where Sem’s Duct Cleaning comes in. We’re a long-standing company that provides duct cleaning and sanitization for commercial, industrial, and residential properties across the Greater Toronto Area.


By supplying you with professional air duct cleaning services, we help you keep yourself, your loved ones, and your staff safe during the COVID-19 pandemic. In addition to expert duct cleaning, we also perform filter replacement and sanitize common touchpoints to minimize the risk of infection. Our #1 priority is the safety of our customers and technicians. All of our locations are currently open and operational. If disruptions in our availability occur, we’ll give you as much advance notice as possible.

Besides regular air duct cleaning, replacement of filters and sanitizing common touch points contribute to combating the spread of COVID-19.

Ensure optimal air quality at your home or workplace

Call us at (647) 476-2711

Signs of dirty/clogged HVAC ducts and air filters

Dirty air ducts can reduce the life of your HVAC equipment, aggravate chronic conditions such as asthma and allergies, and cause many other problems. If you’re dealing with any of the issues outlined below, it’s strongly recommended that you contact professionals in duct cleaning.

  • Excessive noise during operation
  • Dust or dirt being blown out of ducts
  • Reduced efficiency & increased energy consumption
  • Mold & mildew infestation
  • People coughing or complaining of nasal congestion
  • Unpleasant smells from the HVAC vents

How regular air duct cleaning can improve indoor air quality

Indoor air quality can have a huge effect on the health and comfort of a building’s occupants. Poor air quality increases not only the risk of infectious diseases spreading, but also the discomfort caused by allergies, asthma, bronchitis, and other respiratory conditions. Systematic duct cleaning helps solve this issue by:

  • Reducing the risk of bacterial and viral transmission
  • Minimizing dust and mold buildup inside the HVAC system
  • Easing respiratory illnesses by limiting the amount of pollutants

Note: Air duct cleaning cannot stop the spread of COVID-19 on its own. However, it can help reduce the risk of airborne transmission. Please continue to follow the other safety guidelines: wash your hands, sanitize your surroundings regularly, and practice social distancing.

How do air vents become dirty?

Over time, dust, lint, hair, pet dander, and skin flakes will naturally get caught inside air filters and accumulate along the length of air ducts. If left unchecked, these particulates will eventually become infested with all sorts of dust mites, pathogens, fungi, allergens, and toxins.

Renovations are another major cause of dirty HVAC ducts. Without a thorough cleaning, construction dust will get inside the air ducts and end up being recirculated throughout your home or premises.

How often should you clean your HVAC ducts?

As a rule of thumb, air ducts should be cleaned once every 3-5 years. However, in light of the COVID-19 pandemic, more frequent cleanings are recommended. Furthermore, properties located near major roads, construction sites, manufacturing plants, and other sources of pollution should book more frequent air duct cleanings.

Once you decide to clean your air duct cleaning system, call Sem’s Duct Cleaning or simply fill out our online quote request form. We’ll get in touch with you within 12-24 hours.

Book with us & boost your IAQ in no time

Call us at (647) 476-2711