# Insulation thickness tradeoff
# Scope: Single slab insulation resistance with surface films omitted.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

area = 10 m^2
thickness = 100 mm
conductivity = 0.04 W/(m*K)
difference = 20 K

heat := conductivity*area*difference/thickness [W]

check heat loss budget: heat <= 100 W

scenario alternative: area = 8 m^2