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N1101.13.1 (R401.2.1) Tropical Zone
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Residential buildings in the tropical zone at elevations less than 2,400 feet (731.5 m) above sea level shall be deemed to be in compliance with this chapter provided that the following conditions are met:
- Not more than one-half of the occupied space is air conditioned.
- The occupied space is not heated.
- Solar, wind or other renewable energy source supplies not less than 80 percent of the energy for service water heating.
- Glazing in conditioned spaces has a solar heat gain coefficient of less than or equal to 0.40, or has an overhang with a projection factor equal to or greater than 0.30.
- Permanently installed lighting is in accordance with Section N1104.
- The exterior roof surface complies with one of the options in Table C402.3 of the International Energy Conservation Code, or the roof or ceiling has insulation with an R-value of R-15 or greater. Where attics are present, attics above the insulation are vented and attics below the insulation are unvented.
- Roof surfaces have a slope of not less than one-fourth unit vertical in 12 units horizontal (12-percent slope). The finished roof does not have water accumulation areas.
- Operable fenestration provides a ventilation area of not less than 14 percent of the floor area in each room. Alternatively, equivalent ventilation is provided by a ventilation fan.
- Bedrooms with exterior walls facing two different directions have operable fenestration on exterior walls facing two directions.
- Interior doors to bedrooms are capable of being secured in the open position.
- A ceiling fan or ceiling fan rough-in is provided for bedrooms and the largest space that is not used as a bedroom.
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