United StatesIndiana

(IECC 2009) Residential Building Code (Indiana)

Applicable Building Type(s)

New residential

Policy Requirement Level


Policy Sequence


Development Authority: International Code Commission and Indiana State government

Implementation Authority: Local authorities

Verification Authority: Code official

Prescriptive Compliance path

Occupiable space, excluding crawl spaces and garages

Energy Requirements:


U-Values (Btu/h.ft2)FloorRoofWallsWindows
Climate zone 1 0.064 0.035 0.197 1.2
Climate zone 2 0.064 0.035 0.165 0.65
Climate zone 3A and 3B 0.047 0.035 0.141 0.5
Climate zone 4A and 4B 0.047 0.03 0.141 0.35
Climate zone 4C 0.033 0.03 0.082 0.35
Climate zone 5 0.033 0.03 0.082 0.35
Climate zone 6 0.033 0.026 0.06 0.35
Climate zone 7 0.033 0.026 0.057 0.35
Climate zone 8 0.028 0.026 0.057 0.35


The total glazed area may not exceed 18% of the conditioned floor area using the prescriptive method SHGC (for all fenestration including skylights) is 0.30 W/m2.k for climate zones 1-3. No SHGC requirement for other zones


Skylights individually are 0.75 W/m2.k zones 1-2, 0.65 W/m2.k zone 3 and 0.60 W/m2.k zones 4-8

Air Leakage

7 ACH at 50Pa. The thermal envelope must be verified even when using the perscriptive method

Space Heating System

At least one thermostat shall be provided for each separate heating and cooling system. Specific requirements exist for ducts, piping, ventilation, pool systems and snow melt systems Requirements are relative to equipment size and building type.

Water Heating System

All circulating service hot water piping shall be insulated to at least R-2 and have automatic or accessible manual switches to turn off the pump when the system is not in use


A minimum 50% of lamps in permanently installed lighting fixtures shall be high-efficacy lamps.

Renewable Energy

Pools deriving >60% heating energy from site-recovered or solar energy are exempt from pool specific energy saving measures

Compliance Softwares:

End-uses considered:

Space cooling, Space heating, Water heating, Ventilation

Performance Compliance path

Not a requirement / performance based elements are based on a reference model and are relative to energy costs

Energy Requirements:



Climate zones