Pressure		bar(a) MPa psi(a)
	Temperature		C K F
	Enthalpy		kJ/kg Btu/lb
	Entropy		kJ/kg/K Btu/lb/F
	Vapour fraction
	Specific volume		m3/kg ft3/lb
	Specific heat		kJ/kg/C Btu/lb/F
	Dynamic viscosity		Pa s lb/h/ft
	Thermal conductivity		W/m/K Btu/h/ft/F
	Prandtl no.
	Critical velocity		m/s ft/s
	Check