Q: We are having an enclosed porch, which was badly done long before we bought the house, remodeled. We are replacing baseboard heating with a hot-water radiant-floor system. The contractor will first ...

STATEN ISLAND, N.Y. -- This is a not an easy question to answer because there is no exact science to the life expectancy of a heating system, rather a suggestive time frame of 18 to 20 years. The ...