Energy Calculations & Code Compliance for Florida Projects

A Manual J calculation determines the heating and cooling loads for a building based on its specific construction, orientation, climate zone, and occupancy. Florida building code requires load calculations for HVAC system sizing on new construction, additions, and major renovations. This ensures your system is right-sized — not too large (which wastes energy and causes humidity issues) and not too small (which can't keep up on peak days).

Manual J calculates how much heating and cooling your building needs. Manual D designs the duct system to deliver that capacity — including duct sizes, routing, and register placement. For new construction, most jurisdictions require both. For equipment replacements in existing homes, typically only Manual J (and Manual S for equipment selection) is needed.

In Florida, all new construction and most substantial renovations require energy code compliance documentation for permitting. This includes an EnergyGauge or REScheck report demonstrating that your building meets the Florida Building Code energy provisions. Some jurisdictions also require compliance for window replacements, re-roofing, or insulation changes. We can help you determine what's required for your specific project and jurisdiction.

Standard turnaround for residential Manual J and energy compliance reports is 2–3 business days from receipt of complete plans. Expedited service is available for time-sensitive permits. Commercial projects and complex residential projects may require additional time depending on scope. We'll provide a clear timeline when you request your quote.