Pronto!™ is a line of two tankless water heaters for commercial and residential applications. The energy-saving units have no standing pilot light and no storage tank, eliminating the need to maintain a large supply of pre-heated water. The RTG-42PV, which delivers up to 4.2 gallons of 100ºF water per minute (at a 45ºF rise in temperature), has a Btu per hour range of 31,500 to 118,000. The RTG-74 is a whole-house model, which is also suitable for commercial applications, and provides up to 7.4 gallons of 100ºF to 140ºF water per minute. It features Btu/hour inputs from 21,700 to 199,000.
