roughly 2 times bigger. costa rica: 51,000 square kilometers. kentucky: 104,000 square kilometers. roughly 2 times bigger. costa rica: 51,000 square kilometers.
Whole house water heaters are installed in a single location and supply the hot water for all fixtures and appliances in the home. Both tankless and tank-type water heaters can serve as whole-house systems, costing an average of $679 to install.
Solar hot water is still a good idea and can be done with a much smaller roof area. Most of the hot water needed for an average household can be provided by 40 to 60 square feet of panels. With current federal tax credits, the typical installed cost for these systems is $5,500 to $7,500.