Mechanical Design 8,000 sq ft luxury residence

Acacia Engineering provided comprehensive mechanical design services for a four-storey, 8,000 sq. ft. luxury home. This unique residence includes a partially separated basement rental suite and an upper-level primary residence, requiring a multi-zoned system that balances performance, comfort, and compliance with BC Step Code requirements. 

The design overcame complex architectural challenges, including extensive structural steel I-beams and fire separation demands, while preserving ceiling heights and optimizing air distribution throughout the home. 

Mechanical Highlights 

  • Zoned HVAC Design 
  • Basement Suite: Hydronic in-floor heating (IBC CX-150 combi-boiler) with Mitsubishi heat pump for supplemental heating/cooling. HRV with preheater ensures fresh air in winter. 
  • Main Residence: In-floor heating (IBC VX-199 boiler) with two Mitsubishi heat pumps and two fan coils to service four comfort zones. HRVs paired with hydronic coils provide balanced ventilation. 
  • Smart Zoning & Controls 
  • Four-zone configuration managed by EWC Controls with motorized dampers and Ecobee Smart Premium thermostats. 
  • Always-on ventilation to key utility spaces ensures comfort and air quality across all living areas. 
  • Energy-Efficient Ventilation Strategy 
  • Aldes ZRT (Zone Register Terminals) provide code-compliant, demand-based bathroom ventilation without unnecessary energy loss. 
  • Plumbing Systems 
  • Smart water monitoring via Moen Flo shut-off valve. 
  • Separate gas and water metering for suite and residence. 
  • CSA- and Code-compliant water, sewer, and gas infrastructure. 
  • Advanced Indoor Air Quality Solutions 
  • Smoke dampers allow for safe recirculation during wildfire events. 
  • Dual-stage filtration system with MERV 13 final filters. 

Results & Impact 

The project successfully delivered a robust mechanical solution for a complex, high-end residential build. By integrating smart controls, efficient zoning, and tailored ventilation, the design ensures long-term comfort, resilience, and operational efficiency in a demanding mountain climate.