Why does not freshwater lakes become salty eventhough it meets ocean at somepoint? Do oceans grow more or less salty over time? If the oceans were only as salty as a fresh water lake, and had always been that way, would there be more life in the oceans that had evolved ...
Replacing a boiler typically costs an average of $50-$300, but this price can be drastically higher depending on where you live and the location of the boiler. Replacing leaking, aging, or bad ductwork costs an average of $35-$55 a linear foot for labor and materials, depending on the length and type of ducts.
General Cost. A new boiler typically costs anywhere from $2,500 to $4,000 for regular efficiency systems at the time of publication, but the price tag is higher for high-efficiency units, ranging from $5,000 to $9,000.Boilers with higher prices typically have a variety of convenient unit features.nergy and maintenance expenses over the life of a new boiler -- which is an estimated 20 years -- add up to about $18,000 for a new boiler. However, the cost is around $24,000 for a regular boiler that does not meet energy efficiency standards.