Heat-Loss & Floor Area Calculator
Walls now render in a fixed 2×2 grid: North/East on the first row and South/West on the second. The “Wall Adjacency” dropdown sits above “Adjoins Unheated”.
Results Summary
Party totals include only walls with adjacency Neighbouring Property.
Windows Calculator
Enter up to 15 windows. Formula: Area = Width × Height. Export to CSV or PDF.
| No. | Width | Height | Area |
|---|---|---|---|
| Total Window Glazing Area | 0 | ||
Project Totals
Total Floor Area: 0.00 m²
Neighbouring Party Walls: 0.00 m
Est. Heat Loss: 0 W
Assumptions: wall height 2.4m, ΔT 20°C; U-values — External 1.7, Party(same) 0.9, Party(ext) 1.1, Party(neighbour) 0.6. Edit via code if needed.
Legend
External Wall
Party Wall (Same)
Party Wall (Extension)
Party Wall (Neighbour)
Window / Opening
Dimension/Labels
