Ductwork Design in Toronto

We have extensive knowledge in HVAC design and ductwork services Toronto, as well as installation of air flow systems. Call us for Ductwork Designs in GTA and surrounding Areas.

We are capable of working on residential and commercial projects and understand how ductwork needs to be done to allow your heating and cooling systems to be energy efficient and up to code.
We work on Residential/Commercial – New construction & remodels.

About Ductwork Designs

Furnaces and air conditioners require a certain amount of airflow, measured in CFM (Cubic Feet Per Minute), to be passed through the equipment (supply and return ducts) in order for the equipment to function properly and efficiently.


All residential/commercial spaces have unique requirements and construction that pose obstacles when designing the ductwork system to accommodate each room or area with proper airflow.
The ideal ductwork system achieves both goals by providing enough airflow to and from the heating/cooling equipment as well as heating and cooling the home or office evenly.

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Important Ductwork Design Things to Consider

Check your ductwork–is it insulated? No matter how “state of the art” your heating/cooling system is, if your ductwork is bad, it will diminish your system’s efficiency.

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Consequences of Poor Ductwork Design

According to the US Department of Energy, the average HVAC duct system is only about 60 percent efficient. That means air is not flowing through your space and your HVAC system as it should be, which leads to all kinds of undesirable consequences, including:

6 Tips for Good Ductwork Design

To make sure your ductwork is properly designed, start by involving a knowledgeable HVAC design professional early in your renovation design process. An experienced pro will work with the architect and contractor to do the following:

1. Choose the best location for HVAC equipment and ducts. With proper planning, the HVAC equipment should be centrally located in the space to allow for the shortest possible duct runs. Ducts should be located in internal walls and ceilings to minimize the loss of conditioned air. Avoid installing ducts in attics and unconditioned crawl spaces for maximum efficiency.

2. A detailed load calculation. Especially when your space has different rooms or areas with varying heating and cooling requirements, it’s important that the load calculations be done individually for each room, rather than only for the space as a whole.

3. Consider your equipment type and supporting systems. Certain types of air conditioning systems, like heat pumps, require larger ducts. If your system includes air purifiers with activated charcoal filters, these also affect air flow and may require larger ducts and/or additional air returns.

4. Use the right materials, fittings and supports. Ductwork materials can vary depending on the requirements and the budget, but make sure your installer uses the right materials for your needs. Flexible ducts (often called “flex”) made from reinforced plastic are easier and cheaper to install, but not as strong and durable as sheet metal.

For more information about the use of flexible ducts, read this ACHRNews article about ductwork design.

If quiet operation and energy efficiency are very important to you, you might want to go with duct board, made from pressed fiberglass, which is more expensive but very quiet and efficient.

5. Choose the right duct size and layout. Once all the system variables have been decided, your HVAC design professional can determine the most efficient ductwork design layout and calculate the correct duct size. To account for all the necessary factors, many professionals use a tool called ACCA Manual D.

6. Ensure proper ductwork sealing. Did you know that as much as 20 percent of your conditioned air can be lost when duct joints are not correctly sealed? The problem is compounded with high efficiency systems, which run longer at a lower capacity. Air is in the ducts for a longer period of time and so more can escape through leaky joints. Make sure your duct joints are sealed with mastic gum or metal-backed tape to prevent leaks.

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Call us at (647) 258-5449 to schedule a service visit, or contact us online to request an appointment, estimate, or additional info.

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