Jefferson County Energy Calculations:

Commercial

Based on Climate Zone 5 per the 2009 International Energy Conservation Code.

All projects will need to meet or exceed the requirements of the 2009 IECC Chapter 5 ASHRAE/IESNA 90.1 or simulated energy performance analysis per the 2009 IECC Section 506. Simulated energy methods per Section 506 will be permitted on the plans with a PE stamp on the drawings.

New Commercial Buildings or Commercial Additions will require (COMcheck) or prescriptive measures of Chapter 5, 2009 IECC for the building thermal envelope, mechanical systems and electrical/lighting.

Tenant Finishes and changes of occupancy will require (COMcheck) for mechanical and interior lighting.

New homes - 4 methods
    1. Prescriptive per Chapter 11 of the 2009 IRC
    2. UA Alternative per the 2009 IRC/REScheck
    3. Performance per section 404 of the 2009 IECC
    4. Professional design

Additions, Alterations or Repairs - 2 methods:
    1. Prescriptive per Chapter 11 of the 2009 IRC
    2. Professional design

See Residential Energy Code Submittal Requirements - includes Manual J and Manual D requirements.

Worksheets for energy code, Manual D and Manual J:
    Duct sizing worksheet (pdf)
    Effective length calculation worksheet (pdf)
    Friction rate worksheet (pdf)

Requirements for Installation of Photovoltaic Systems
    Commercial
    Residential

Governors Energy Office Website: www.colorado.gov/energy

Last Modified: May 21, 2010 07:34 AM