Kitchener-Waterloo Ductwork & Duct Design

Ductwork costs depend on the scope of the project. Sealing and insulating existing ducts typically runs $500-$2,000. Replacing a damaged section costs $500-$1,500. A complete new duct system for a home renovation or new build costs $3,000-$7,000 depending on the number of registers, total duct length, and whether runs pass through conditioned or unconditioned space. Custom fabrication for unusual layouts or commercial buildings costs more. Because we run our own in-house fabrication shop, turnaround is faster and pricing stays competitive. We provide a detailed written estimate after an on-site assessment at no charge.

While basic duct connections are not overly complicated, professional installation makes a significant difference in system performance. Small errors in sizing, sealing, or support cause air leaks, noise, uneven temperatures, inconsistent static pressure, and increased wear on your furnace blower. A professional uses tools like a Ductolator to calculate correct duct dimensions based on your furnace's CFM output, seals every joint with mastic sealant, and tests airflow at each register. Improperly installed ductwork can waste 25-40% of your heating and cooling energy.

Yes. Standard duct height is 8 inches, but we fabricate a lot of 4 inch low-profile ductwork for duplexes, basement renovations, and any space where ceiling height matters. The 4 inch profile gives you more headroom without sacrificing airflow, as long as the system is sized and designed correctly for it. Because we own our fabrication shop, we can build these custom profiles on your project timeline without waiting on outside suppliers.

No, ductwork itself does not need routine maintenance the way a furnace or air conditioner does. Properly installed and sealed ductwork can run 20-25 years without scheduled service. It can develop problems, such as leaks at joints, damaged flexible sections, or degraded insulation, but those are repairs rather than maintenance. If you notice uneven temperatures, increased dust, or whistling sounds, we inspect the system and fix what's actually broken. We do not upsell you on maintenance that isn't needed.

Round ductwork moves air more efficiently because the circular shape creates less friction and turbulence. However, round duct requires more vertical clearance, which is often limited in Kitchener-Waterloo basements and older homes. Rectangular duct fits into tighter spaces and is more common in residential construction for that reason. We typically use round duct for main trunk lines where space allows and rectangular duct where ceiling height is restricted. The right choice depends on your home's layout, required airflow, and available installation space.

Not always, but it is worth evaluating. If your ductwork is under 20 years old, properly sealed, and correctly sized for your new furnace's output, it may only need minor sealing and rebalancing. If the ductwork is over 25 years old, visibly damaged, poorly insulated, or undersized for a higher-output system, replacing it at the same time as your furnace saves labour costs and ensures the new system delivers its full rated efficiency. Pairing a new high-efficiency furnace with undersized or leaky ductwork means you never achieve the AFUE rating you paid for. We assess your existing ducts during every furnace consultation and give honest recommendations.