h_n-h₁

HE (total heat production)

Heα_i (heat production per hour)

24 hours

FHP (fasting heat production)

fhpα_i (heat production per hour)

24 hours

HiE (heat increment)

hiEα_i (heat increment per hour)

24 hours

HdE_e (Heat increment post ingestion)

hdE_cgα_i (heat increment per hour)

Approx. 3 hours

HfE (heat of fermentation)

hfEα_i (heat increment per hour)

24 hours