Finitary coding for the sub-critical ISING model with finite expected coding volume

It has been shown by van den Berg and Steif [5] that the sub-critical Ising model on Z^d is a finitary factor of a finite-valued i.i.d. process. We strengthen this by showing that the factor map can be made to have finite expected coding volume (in fact, stretched-exponential tails), answering a question of van den Berg and Steif. The result holds at any temperature above the critical temperature. An analogous result holds for Markov random fields satisfying a high-noise assumption and for proper colorings with a large number of colors.