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.
A combi boiler installation will cost on average Â£550. Obviously, costs do vary according to the different boiler models and whether you are replacing your radiators. Combi boilers prices vary from Â£650 to Â£2000, depending on the model you buy.he downside of replacing your old back boiler with a combination boiler is reliability. For all their mod cons, improvements in heating efficiency, combi boilers are not as reliable as the old the back boiler. The life span of the combi boiler is also less than the old back boiler.