You can purchase American Standard water heaters with capacities of 40, 46, and 50 gallons. The tall and short configurations are available. American Standard electric water heaters generally use six to 54 kilowatts of electricity, depending on the capacity. These units are fully compliant with ANSI energy efficiency standards, and they typically come with warranties for six or twelve years. These heaters are the perfect choice for homes looking to cut their electricity bills and save on the environment. If you have a large home, American Standard has water heaters that can meet your needs. The gas-powered water heaters are insulated with R-16 foam, which is environmentally friendly. They are hydrostatically tested to prevent overheating. They shut off when water reaches a specified temperature or pressure. Their Dura-Gas coating and anode rods ensure a long life for your tank. American Standard water heaters also boast lower nitrogen oxide emissions than other tank-style models. The D-80-199-AS Natural Gas Water Heater by American Standard is a commercial-grade model with an 80-gallon capacity. It features 4 anode rods and a Dura Glas lined tank for additional protection against corrosion. It also features a motorized flu damper to help cut fuel costs. With its non-cfc foam insulation, it is one of the most powerful water heaters available on the market.