With a new energy efficient boiler? The installation cost of for a new boiler depends on the boiler and the work required however, at boxt we believe in providing a fixed fee that includes 'everything in the box'. We would highly recommend all koegel plumbing services without hesitation! I think some folks here may just be impatient....when i use with warm water and let sit overnight, it does a great job on my sinks and bath. It is below the dignity.