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.
Boilers are more expensive than furnaces. Mid-efficiency boilers cost anywhere from $2,500 to $4,000, while high-efficiency boilers run $5,000 to $10,000. Those prices include installation, but keep in mind that installing a boiler is more expensive than installing a furnace because the process is more complex.id-efficiency boilers cost anywhere from $2,500 to $4,000, while high-efficiency boilers run $5,000 to $10,000. Those prices include installation, but keep in mind that installing a boiler is more expensive than installing a furnace because the process is more complex.