How do I Plan an Hvac Design for New Construction in Colorado?

by | Apr 21, 2026

Planning an HVAC design for new construction in Colorado requires specific considerations for the state’s high altitude and extreme weather swings. To begin, it is essential to conduct a Manual J load calculation that is adjusted for Denver’s dry climate and 5,280-foot elevation, where equipment sizing typically needs to be 3% to 5% larger due to reduced air density.

Key steps in the planning process include:

  • Early Integration: Incorporate HVAC design into architectural plans early to ensure compliance with the 2021 International Energy Conservation Code (IECC) and proper air sealing.
  • System Selection: Choose high-efficiency equipment such as furnaces with 90% or higher AFUE ratings, dual-fuel heat pumps for extreme cold, or ductless mini-splits. Equipment should be derated for altitude to ensure performance.
  • Zoning and Layout: Design for 2 to 4 zones to manage temperature variations across different floors. Ductwork should be designed with straight runs and minimal bends to improve airflow at high altitudes.
  • Licensing and Permitting: Ensure the project uses a contractor with a Colorado PCL.3 or PCL.4 license. You must submit detailed plans, including ductwork layouts and SEER2 ratings, to local authorities for necessary permits and inspections.

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