In terms of the usual Prandtl and Taylor numbers, a combined dimensionless number Pi(c)-similar-to-TaPr2/1+Pr is introduced for rotating thermal flows. Depending on this number and relative to an integral scale, a thermal boundary layer thickness delta(theta)/l-similar-to-Pi(c)(-1/4) for the laminar case and a thermal Kolmogorov scale n(0)/l-similar-to-Pi(c)(-1/3) for the turbulent case, are developed. In terms of those scales, a model for laminar heat transfer Nu-similar-to-Pi(c)(1/4) and another for turbulent heat transfer Nu-similar-to-Pi(c)(1/3) are proposed. Experimental literature is correlated by these models.