2018 IECC - Commercial Provisions
The commercial energy code applies to all buildings except those defined as residential. The code applies to new construction as well as additions, alterations, renovations, repairs of existing structures, changes in space conditioning, and changes in occupancy.
For buildings with a mixed occupancy, the residential portion must comply with the residential requirements and the commercial portion must comply with the commercial requirements.
Commercial Significant Changes
R-5 insulation required for heated slabs
U-factor requirements added for garage doors with glazing less than 14%
Requirements for airspaces when the thermal properties are calculated as part of the wall assembly
Expanded lighting control requirements for interior and exterior lighting
Showerhead flow rate requirement added
Maximum on-site renewable energy cost reduction of 5% added to the Performance compliance option
New additional efficiency package options added
Additional Efficiency Package Options - More to Choose From
More efficient HVAC equipment
Reduced lighting power density
Enhanced digital lighting controls
On-site renewable energy
Dedicated outdoor air system
Reduced energy use in SWH
Enhanced envelope performance
Reduced air infiltration
REQUIRED INSPECTIONS
Footing and foundation
Framing and rough-in
Plumbing rough-in
Mechanical rough-in
Electrical rough-in
Final
Full text of ASHRAE Standard 90.1-2016 is available on the ASHRAE website, here.
Compliance Options
Prescriptive
Performance Approach
ASHRAE 90.1-2016