The hourly energy savings is the minimum of the equivalent energy supply and the low-temperature process firing rate.

\begin{equation}\label{eq:cascade-high-to-low-hourly-energy-savings} E_{hourly} = \min(E_{supply}, F_{low})\end{equation}

Symbols

\(E_{hourly}\)	Hourly energy savings \([\unit{ \MMBtu\per\hour}]\)
\(E_{supply}\)	Equivalent energy supply \([\unit{ \MMBtu\per\hour}]\)
\(F_{low}\)	Low-temperature process firing rate \([\unit{ \MMBtu\per\hour}]\)