In-Slab Ventilation Duct Systems – Innovative High-Rise HVAC

Galvanized sheet-metal ducts cast directly into concrete slabs—taller ceilings, energy efficiency, faster construction, noise reduction. Manufactured in-house in Mission, BC.

10 Key Benefits

10 Ways DDK™ Redefines Building Excellence

  • Superior Aesthetics & Taller Ceilings — Clean, flat ceilings with more usable headroom for open, modern designs.
  • Energy Efficiency via Thermal Mass — Concrete slab acts as a natural thermal battery, reducing HVAC runtime and long-term energy costs.
  • Accelerated High-Rise Construction — Pre-fab sections hoisted and tied to rebar before pour—streamlines MEP coordination and shortens timelines.
  • Unmatched Noise Reduction — Dense concrete encasement minimizes sound transmission between floors for quieter spaces.
  • Optimal Airflow & Efficiency — Smooth galvanized interiors reduce turbulence, friction, and energy use.
  • Space Optimization — No ceiling/wall runs—enables flexible layouts and increased rentable/sellable area.
  • Cleaner, Healthier Operation — Sheet metal resists dust and microbial growth better than fiberglass alternatives.
  • Durability & Longevity — G-60 galvanized steel withstands corrosion and structural stress for decades.
  • Certified Compliance & Peace of Mind — QAI Listed (B1135-1 Edition 2) for fire-stopping penetrations (CAN/ULC S115 & ASTM E814), fully meets National Building Code and BC requirements.
  • Local Canadian Manufacturing — Produced in Mission, BC—fast local stock, same-day shipping across Fraser Valley/Greater Vancouver/Western Canada, climate/code compatible.

Add certification badges/icons: QAI Listed B1135-1, CAN/ULC S115, ASTM E814, Made in Canada, G-60 Galvanized, Local 280 Union

Ready to Elevate Your Next High-Rise or Multi-Unit Project?

Contact us for technical resources, samples, or to discuss how In-Slab Duct can optimize your design, schedule, and occupant experience.

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