Save money and energy with this energy efficient model that operates at a 0.92 Uniform Energy Factor (UEF). Short 49.75-in H x 20.5-in diameter design is ideal for condensed spaces like under a staircase or a closet installation. Premium heating elements, anode rod and fused ceramic tank shield provide superior tank protection and extend water heater life. Non-CFC polyurethane foam insulation and factory-installed heat trap nipples reduce heat loss for maximum efficiency and energy savings. Easy temperature control with adjustable thermostat can be set higher for dishwashers and laundry machines or lower as needed. Temperature and pressure relief valve supplied for top installation.