I recently received a notice from my good friend John O'Reilly (former editor of our sister publication Supply House Times) regarding the introduction of the new Rheem Pronto water heaters. The Rheem Pronto units are instantaneous, tankless water heaters.
The statistics on the Pronto heaters are impressive. The small unit is 22 inches by 13 inches by 5 inches deep. It weighs all of 35 pounds. The small unit can deliver a 4.2-gpm (at 45 degrees F) rise of continuous hot water, while the larger unit can deliver 7.4 gpm. The units are self-modulating to save on the amount of gas used.