XCalibur Condensing High Efficiency Tankless Water Heaters with X3 Scale Prevention Technology are designed to support busy contractors and homeowners. The unit is available in 160,000-; 180,000-, and 199,000-BTU/hr models and features a Uniform Energy Factor (UEF) of 0.95 for optimal performance. Patented X3 Scale Prevention Technology comes standard on three XCalibur models. Other models are available with X3 Technology as an optional accessory. X3 Scale Prevention Technology inhibits scale build-up and corrosion to extend the life of the unit up to three times longer. XCalibur units also qualify for state and local rebates and are ENERGY STAR certified.
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