Grihalo — Ventilation Engine v1 (NBC + cross-vent + ACH)

Rooms (name, x, y, w, h, use)

use: hab / kitchen / bath — mm, one per line

Openings (room, wall, type, w, h, sill)

wall: N/S/E/W · type: window / vent / door

Site & bye-law

Ceiling (mm)

Openable ≥ 1/n of floor

Prevailing wind

Design wind v (m/s)

ΔT in−out (K)

Building height (m)