How much does this cost to the nearest dollar?

Noritz Outdoor Tankless Water Heater, max. Btuh, 5.0 Gpm - Natural Gas
Product Description The NORITZ NR50OD is a 5 Gallon Per Minute tankless water heater designed for outdoor application. valve kit (required for installation) sold separately. Note this kit is sold separately because it is available with threaded and copper sweat connections and we're not sure which you prefer ) Common companion item is the PC-1S pipe cover From the Manufacturer Outdoor tankless water heater flows up to 5 gallons per minute. Noritz has been an innovator in the water heating industry for over 60 years. We introduced the first modern, electronically controlled tankless water heater in 1981 and we remain the leader in energy savings and superior hot water delivery

Price is $644.00
Price: $644