Provided an estimate for a tankless water heater replacement. Evaluated the existing water heater setup and recommended upgrading to a high-efficiency Rinnai tankless water heater for better performance and energy savings. The estimate includes removing the old unit, installing the new tankless system, updating the gas and water lines, and ensuring proper venting. Detailed the benefits of a tankless water heater, including continuous hot water and lower utility bills. Included a comprehensive cost breakdown for labor, materials, and permits.