DOMESTIC HOT WATER Gas storage water heating Delivers 81-gallon first hour ratingPatented eco-friendly Green Choice® Intelligent electronic gas control provides precise temperature control and LED status indicator Learn more Electric storage water heating Efficient Power Source Warranty AssuranceGenerous Capacity and Compact Design Learn more Solar Water Heaters Heaters with different capacities made in Greece Electric heater as a backup Optionally equipped with a coil which can be used for installing a gas backup especially if there is central heating boilers