Duval County energy calcs & Manual J.
The hottest cooling design and the coldest winter on this list.
Jacksonville's 1–2 family checklist wants R402, R405, R406 or total UA with signatures, the input summary checklist, the EPL card, Manual S, Manual D, and Manual J (2023, 8th Edition minimum), with total cooling within 100% to 115% of the calculated load. Duval is climate zone 2A, with a 32°F heating design limit.
- Department
- City of Jacksonville Building Inspection Divisionconsolidated city-county · Electronic submittal into named upload folders (per checklist)1
- Code edition
- FBC Energy Conservation, 8th Ed. (2023)9th Ed. (2026) scheduled for Dec 31, 2026 · what changes2
- Climate zone
- Zone 2A1% cooling 94°F · 99% heating 32°F3
- Price
- $195 · $445 · $595Energy calc from · full package · sealed. Same in all 67 counties · price list
- Ready by
- 2–3 business daysExpedited: within 24 business hours, +$150. Clock starts when complete plans pass intake (3:00 PM ET cutoff) · how it works
- Evidence
- 6 primary sourcesEvery number on this page links to its source · references
What Duval reviewers ask for
Jacksonville's new 1–2 family checklist, revised April 21, 2026, asks for the energy documentation checklist; form R402, R405, R406 or total UA with signatures; the input summary checklist for field verification; and the Prepared By and Owner/Agent certification block signed, printed and dated.1 The project header must carry Jacksonville's jurisdiction number, 261300.1
The rest of the Duval submittal notes2 more paragraphs
It names the ACCA manuals one by one: Manual S for equipment, Manual D for ducts, and calculations based on ACCA Manual J, 2023, 8th Edition minimum.1 Equipment total cooling must fall within 100% to 115% of the required cooling load, and if the Manual J lacks equipment details, an equipment summary sheet is required with manufacturer, tonnage, model, total cooling, SEER and HSPF or AFUE.1
Uploads are sorted into folders: energy forms and calculations go into the Energy Calculations folder as one PDF, and the state copy of the energy form goes there as its own single PDF.1 Building orientation and dimensions must match the site plan.1
Building departments
1 department · addresses, phones, portals
Duval County and the City of Jacksonville are a consolidated government, and the city's checklist carries its own jurisdiction number, 261300, for energy forms.1 Jacksonville Beach, Atlantic Beach, Neptune Beach and Baldwin are separate municipalities; check with each city whether it runs its own building department.
| Department | Address | Phone | Portal |
|---|---|---|---|
| City of Jacksonville Building Inspection Division (consolidated city-county) | See official page | Official page | Electronic submittal into named upload folders (per checklist)1 |
Design conditions
94°F cooling · 32°F heating · zone 2A · weather stations
Cooling station: Jacksonville Cecil Field (Manual J). Heating station: Cecil Field (ASHRAE).3
Duval has the hottest cooling and the coldest heating design on this list: 94°F at 1% cooling from Jacksonville Cecil Field, and 32°F at 99% heating.3 It's zone 2A.2 Our take: at 32°F, heating is a real design load in Duval, so a heat pump's low-temperature capacity and the backup heat need a look that a Miami calc never gets.
Worked example
2,100 sq ft house → 25,180 Btu/h, 2.1 tons · illustrative
Illustrative · not a Manual J
A 2,100 sq ft frame home; the wall type is our assumption. The heating number is the story: with a 32°F design, heating reaches about two thirds of the cooling load, one of the highest ratios among our examples.
| House | new single-storey frame home, Jacksonville suburbs |
|---|---|
| Conditioned area | 2,100 sq ft, 1 storey, 9 ft ceilings |
| Bedrooms / occupants | 3 / 4 |
| Glazing | 14% of floor area (294 sq ft), U 0.32, SHGC 0.25 |
| Walls / ceiling | R-13 walls, R-38 ceiling under a vented attic |
| Air leakage | 4.5 ACH50 |
| Ducts | in the attic, 8% gain allowance |
| Ventilation | mechanical, per FBC formula |
| Outdoor design | 94°F cooling / 32°F heating (sourced above) |
| Indoor design | 75°F cooling / 70°F heating |
| Design grains difference | 38 gr/lb (assumption) |
Illustrative only. A simplified block-load estimate with the inputs shown, not an ACCA Manual J, and not for permitting. A real calc goes room by room with your plans, orientation and equipment data. Code ceiling for single-stage cooling at 1.15× total load: 28,960 Btu/h.5
Local housing
Median year built 1990 · 58.4% single-family detached · Census ACS
The median Duval home was built in 1990; 36.6% of units predate 1980 and 37.2% date from 2000 or later.6 Single-family detached is 58.4% of units, and 92.3% of occupied homes heat with electricity, among the highest shares here.6
Utility rebates
JEA
- JEA. JEA lists a $200 rebate for ENERGY STAR central A/C, heat pumps or ductless mini-splits. Its page shows an application deadline of October 10, 2026, so check whether the program has been renewed.4
Utility programs change often; check the program page before you count on a rebate.
Duval County questions
3 answers · What is Jacksonville's jurisdiction number for the energy form?
What is Jacksonville's jurisdiction number for the energy form?
261300. Jacksonville's 1–2 family checklist says to complete the project header on the energy form with that number. The same checklist asks for the energy documentation checklist, the signed form, the input summary checklist, the EPL card and the Prepared By and Owner/Agent certification block, signed, printed and dated.
How oversized can my A/C be in Jacksonville?
Jacksonville's checklist says equipment total cooling must fall within 100% to 115% of the project's required cooling load. If the Manual J doesn't include equipment information, add an equipment summary sheet listing the manufacturer, tonnage, model number, total cooling, SEER and HSPF or AFUE.
Which Manual J edition does Jacksonville accept?
Jacksonville's checklist asks for calculations based on ACCA Manual J, 2023, 8th Edition at minimum, along with Manual S equipment selection and a Manual D duct design. Calcs run on an older Manual J version risk a comment, so ask your preparer which edition the software uses.
Price
One statewide price in all 67 counties. Building departments decide what they accept; we don’t guarantee approval. Revisions for plan-review comments on the same design are free.
Nearby and related
Sources
6 primary references · numbered to match the citations
- 01City of Jacksonville, New Building: 1-2 Family Checklist, Rev. 4-21-2026 (PDF)jacksonville.gov
- 022023 Florida Building Code, Energy Conservation (8th Ed.), Table R301.1, climate zones by countyup.codes
- 03RESNET / ENERGY STAR, Appendix A: HVAC Design Temperature Limits by State and County (v4, 2019). 1% cooling and 99% heating values drawn from the ASHRAE 2013 Handbook of Fundamentals and ACCA Manual J 8th Ed.resnet.us
- 04JEA, Heating and Cooling Rebatesjea.com
- 05Florida Building Commission, R405-2026 documentation checklist example (quotes R403.7.1.1 cooling equipment sizing limits)floridabuilding.org
- 06U.S. Census Bureau, American Community Survey 2024 1-year estimates (B25018, B25024, B25034, B25035, B25003, B25040), via Census Reportercensusreporter.org