Miami-Dade County is in IECC Climate Zone 1A (Very Hot - Humid). Get accurate Manual J load calculations with official ASHRAE design temperatures for Miami-Dade County.
Miami-Dade County, Florida is classified under IECC Climate Zone 1A (Very Hot - Humid), a cooling-dominated region with humid moisture conditions. With 132 ZIP codes and 1 communities, every HVAC installation in Miami-Dade County must use the ASHRAE design temperatures of 48°F (99% winter heating) and 92°F (1% summer cooling) for accurate Manual J load calculations.
As a cooling-dominated zone, controlling solar heat gain is essential in Miami-Dade County. Windows must have an SHGC of 0.25 or lower, along with R-13 wall and R-30 ceiling insulation. Proper sizing prevents oversized AC systems that short-cycle and waste energy.
Minimum insulation R-values and window performance for Climate Zone 1A in Miami-Dade County, FL.
| Building Component | Minimum Requirement | Unit |
|---|---|---|
| Ceiling / Attic Insulation | R-30 | R-value |
| Wall Insulation | R-13 | R-value |
| Floor Insulation | R-13 | R-value |
| Window U-Factor | 0.4 | BTU/hr-ft²-°F |
| Window SHGC | 0.25 | Coefficient |
| Air Infiltration | 0.25 | ACH50 |
Climate Zone 1A requires precise load calculations. Upload your Miami-Dade County blueprint and get a professional Manual J report in 60 seconds— first report is FREE. Pre-loaded with Miami-Dade County's exact design temperatures (48°F winter / 92°F summer).
Enter your ZIP code to confirm it's in Miami-Dade County and get climate zone details.
Official ASHRAE design temperatures for Miami-Dade County, FL, used for accurate Manual J load calculations.
Minimum insulation and window requirements for Miami-Dade County per IECC 2021 energy code.
Climate Zone 1A: Very Hot - Humid - Cooling-dominated climate with extreme heat and high humidity year-round. Minimal heating requirements.
1 cities and communities in Miami-Dade County share Climate Zone 1A requirements.
Compare climate zones with other counties in Florida. Different zones require different HVAC equipment sizing.
Upload your Miami-Dade County blueprint and get a professional Manual J load calculation using official Zone 1A design temperatures. First report is FREE.
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