The SI unit for heat content is the Joule per cubic metre.1 J/m3 = 26.8392x10-6 Btu/ft3 = 4.30886x10-11 therm/UK galttle='Heat Content';xiunt='J/m3';yiunt='Btu/ft3';mconv=1/0.0000268392;cconv=0.0; Found on https://www.encyclo.co.uk/local/20687
total heatnoun (thermodynamics) a thermodynamic quantity equal to the internal energy of a system plus the product of its volume and pressure; `enthalpy is the amount of energy in a system capable of doing mechanical work` Found on https://www.encyclo.co.uk/local/20974