# Thermal conductivity λ in W/(m·K) (min, max)
THERMAL_CONDUCTIVITY = {
    "brick": (0.22, 0.81),
    "concrete": (1.3, 1.3),
    "reinforced_concrete": (1.7, 1.7),
    "plaster": (0.52, 0.52),
    "pir": (0.021, 0.026),
    "pur": (0.022, 0.028),
    "xps": (0.028, 0.044),
    "mineral_wool": (0.031, 0.044),
    "particle_board": (0.07, 0.18),
    "osb": (0.13, 0.13),
}

THERMAL_CONDUCTIVITY_LOW = {k: v[0] for k, v in THERMAL_CONDUCTIVITY.items()}
THERMAL_CONDUCTIVITY_HIGH = {k: v[1] for k, v in THERMAL_CONDUCTIVITY.items()}


# Surface resistances in m²K/W
RSI_HORIZONTAL = 0.13
RSI_UPWARD = 0.10
RSI_DOWNWARD = 0.17
RSE = 0.04

# Air properties
RHO_AIR = 1.2       # kg/m³
CP_AIR = 1005       # J/(kg·K)
RHO_CP_AIR = RHO_AIR * CP_AIR  # J/(m³·K), volumetric heat capacity