2009 IECC Building Code (U.S. Virgin Islands)

Country / jurisdiction: United States · Year: 2009 · Status: In force · Level: State/Provincial · Type: Voluntary

Policy Requirement Level

Model Code

Governance

Development Authority: International Code Council

Implementation Authority: Local authorities

Prescriptive Compliance path

Occupiable space, excluding crawl spaces and garages

Energy Requirements:

Insulation

U-Values (Btu/h.ft2) Floor Roof Walls

Climate zone 1 0.064 0.035 0.197

Climate zone 2 0.064 0.035 0.165

Climate zone 3A and 3B 0.047 0.035 0.141

Climate zone 4A and 4B 0.047 0.03 0.141

Climate zone 4C 0.033 0.03 0.082

Climate zone 5 0.033 0.03 0.082

Climate zone 6 0.033 0.026 0.06

Climate zone 7 0.033 0.026 0.057

Climate zone 8 0.028 0.026 0.057

Windows

U-Values (Btu/h.ft2) Windows

Climate zone 1 1.2

Climate zone 2 0.65

Climate zone 3A and 3B 0.5

Climate zone 4A and 4B 0.35

Climate zone 4C 0.35

Climate zone 5 0.35

Climate zone 6 0.35

Climate zone 7 0.35

Climate zone 8 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

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

Lighting

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

End-uses considered:

Space cooling, Space heating, Water heating, Ventilation, Lighting interior, Lighting exterior

Performance Compliance path

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

End-uses considered:

Water heating, Ventilation, Space heating, Space cooling, Lighting interior, Equipment

Resources

Notes

Climate zones

ZONE

NUMBER

THERMAL CRITERIA

IP Units

SI Units

9000 < CDD50°F 5000 < CDD10°C

6300 < CDD50°F = 9000 3500 < CDD10°C = 5000

3A and 3B

4500 < CDD50°F = 6300

AND HDD65°F = 5400 2500 < CDD10°C = 3500

AND HDD18°C = 3000

4A and 4B

CDD50°F = 4500 AND

HDD65°F = 5400 CDD10°C = 2500 AND

HDD18°C = 3000

3C

HDD65°F = 3600 HDD18°C = 2000

4C

3600 < HDD65°F = 5400 2000 < HDD18°C = 3000

5400 < HDD65°F = 7200 3000 < HDD18°C =4000

7200 < HDD65°F = 9000 4000 < HDD18°C = 5000

9000 < HDD65°F = 12600 5000 < HDD18°C = 7000

12600 < HDD65°F 7000 < HDD18 °C

Official source: https://codes.iccsafe.org/content/document/747?site_type=public