Cornwall Air Duct Cleaning

Welcome to National Duct Cornwall, your trusted provider of professional air duct cleaning, dryer vent cleaning, and HVAC system cleaning in Cornwall and across the Stormont, Dundas and Glengarry (SD&G) region. We proudly serve both residential and commercial customers, helping improve indoor air quality, HVAC efficiency, and overall comfort.

As part of one of Canada’s largest duct cleaning networks, National Duct brings over 60 years of experience and a reputation for reliable, transparent service. Our advanced, truck-mounted vacuum technology ensures a deep, thorough clean every time—backed by friendly service and no hidden fees.

Why Choose National Duct Cornwall?

With National Duct Cornwall, you’re not just hiring a contractor—you’re partnering with a professional, certified team committed to getting the job done right. Our Ironclad Customer Commitment® means:

• • Transparent pricing – no surprise charges or pushy upsells

• • Powerful vacuum trucks for deep duct and HVAC cleaning

• • Fully trained and insured technicians

• • NADCA-compliant cleaning practices

• • Optional before-and-after photos for peace of mind

• • Fast response times – we can usually be on-site within 48 hours

We don’t telemarket or rely on aggressive sales tactics. Our reputation is built on quality work, word-of-mouth, and customer satisfaction.

Our Air Duct Cleaning Services

We offer complete duct cleaning solutions for homes, businesses, and industrial properties, including:

• • Whole-home air duct cleaning

• • Dryer vent cleaning to prevent fire hazards and improve appliance performance

• • Furnace and HVAC system cleaning

• • Vent and register cleaning

• • Commercial duct cleaning for offices, retail spaces, clinics, and more

• • Industrial air handling system cleaning for factories, warehouses, and production facilities

Clean ducts don’t just help with airflow—they also reduce allergens, dust, odours, and long-term wear on your HVAC system.

Communities We Serve – Proudly Local

National Duct Cornwall is based right here in Cornwall, Ontario, but our service area extends across the region. We proudly serve nearby towns and rural communities including:

• • Long Sault – A scenic riverside community known for its quiet neighbourhoods

• • Ingleside – Nestled between Cornwall and Morrisburg, with growing residential areas

• • South Stormont – A township that includes Long Sault and Ingleside

• • Morrisburg – Home to Upper Canada Village and lakeside subdivisions

• • Lancaster – A charming small town east of Cornwall

• • Alexandria – Located north of Cornwall, popular with commuters and retirees

• • Martintown – A rural village in South Glengarry

• • Finch – Surrounded by farmland, with growing family developments

• • Chesterville – A close-knit community in North Dundas

• • Maxville – Host of the famous Glengarry Highland Games

If you’re unsure whether we serve your area, just give us a call—we probably do!

Book Your Duct Cleaning Today

Don’t let dirty ducts affect your health or your heating and cooling efficiency. Whether you’re in the heart of Cornwall or a rural town nearby, National Duct Cornwall is here to help you breathe easier.

📞 Call us today or fill out our online quote form to schedule service. We respond fast and get the job done right—no gimmicks, no hidden fees, just clean air you can trust.