Wakulla Spring is one of the largest springs in the world, discharging an average of 260 million gallons of water per day. The spring pool is an impressive 315 feet in diameter, and the huge vent is about 82 feet wide, 50 feet high, and 185 feet deep.
Typical costs: Replacing an old oil-fired furnace with a new one typically costs $2,000-$5,000 for a simple installation of a basic model, but it can cost $6,000-$10,000 or more for a larger, more energy-efficient unit with a difficult installation, such as a complex floor plan or hard-to-reach ductwork.
With the ever increasing costs of electricity it is the most expensive furnace to operate on this list. The typical price to replace an electric furnace ranges from $1,000 to $1,500. These furnaces can last about 25 to 30 years and the efficiency ranges between 80 to 90 percent.The heat pump is one of the newest and most efficient designs of furnace, as they operate as both a furnace and air conditioner.ingle stage, 80% efficient gas furnaces typically cost $2,000 or higher, moving up to a 90% efficiency range of this same type can cost $3,000. To move into the 95% efficiency range with a multi-stage or modulating furnace that feature variable speed blowers can cost $5,000 to $7,500.