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Manual J Load Calculator
📊 ACCA Manual J Compliant
Professional Load Calculation & Energy Analysis
Powered by Construction Corps
1
Building Information
Total Floor Area (sq ft)
Ceiling Height (ft)
Number of Stories
Single Story
Two Story
Three Story
Building Type
Residential
Commercial
Mixed Use
2
Climate & Location
ZIP Code
Climate Zone
Zone 1 - Very Hot (South FL)
Zone 2 - Hot (Central FL)
Zone 3 - Warm (North FL)
Zone 4 - Mixed (Southeast)
Zone 5 - Cool (Mid-Atlantic)
Design Temperature (°F)
Indoor Temperature (°F)
3
Roof Information
Roof Type
Gable Roof
Hip Roof
Shed Roof
Flat Roof
Mansard Roof
Roof Material
Asphalt Shingles (Light)
Asphalt Shingles (Dark)
Clay Tile
Concrete Tile
Metal Roofing (Light)
Metal Roofing (Dark)
Built-up Roof
Roof Coverage Area (sq ft)
Ceiling/Roof Insulation (R-Value)
R-19 (FBC Minimum)
R-30 (Standard)
R-38 (Improved)
R-49 (High Performance)
R-60 (Maximum)
Radiant Barrier
No Radiant Barrier
Foil Radiant Barrier
Radiant Barrier Paint
Radiant Deck Sheathing
Attic Ventilation
Natural Ventilation
Ridge & Soffit Vents
Powered Exhaust
Sealed Attic
4
Garage Configuration
Garage Type
No Garage
Attached Garage
Detached Garage
Basement Garage
Garage Conditioning
Unconditioned
Conditioned
Semi-Conditioned
Garage Area (sq ft)
5
Individual Wall Analysis
Wall 1
Remove
Cardinal Direction
North (N)
Northeast (NE)
East (E)
Southeast (SE)
South (S)
Southwest (SW)
West (W)
Northwest (NW)
Length (ft)
Height (ft)
Wall Construction
Wood Frame + R-13 (FBC Min)
Wood Frame + R-15
Wood Frame + R-19
Wood Frame + R-21
Masonry + R-5 Continuous
Masonry + R-10 Continuous
ICF R-17
ICF R-25
0 sq ft
+ Add Wall
6
Floor Systems
Floor Type
Slab-on-Grade
Vented Crawlspace
Unvented Crawlspace
Conditioned Basement
Unconditioned Basement
Raised Floor
Floor Insulation
No Insulation
R-6 (Minimum)
R-11 (Standard)
R-15 (Improved)
R-19 (High Performance)
R-25 (Maximum)
Edge Insulation (Slab)
No Edge Insulation
R-5 (2 ft depth)
R-10 (2 ft depth)
R-15 (4 ft depth)
7
Fenestration Analysis
Window/Door 1
Remove
Type
Window
Door
Sliding Door
Skylight
Attached to Wall
Wall 1
Width (ft)
Height (ft)
U-Factor
SHGC
+ Add Window/Door
8
Occupancy & Internal Loads
Number of Occupants
Appliance Load (Watts)
Lighting Load (Watts)
Infiltration Rate (ACH)
0.35 - Tight Construction
0.50 - Good Construction
0.65 - Average Construction
1.00 - Loose Construction
Calculate Manual J Load
Manual J Calculation Results
