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

Requirements for Thermal Hot Water Solar Systems
Residential

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

Last Modified: Jun 15, 2011 02:00 PM