Are there geographical regions in which certain tankless water heaters are unable to operate effectively?
Yes, mainly because of regional climate conditions, not all tankless water heater models will operate effectively in all regions. See a map that identifies these specific tankless water heater models and regions here or ask one of our friendly sales reps by calling 1-800-955-7661 (9:00AM-9:00PM EST Monday-Friday, 9:00AM-6:00PM EST Saturday-Sunday) NOTE** Bosch Tankless Water Heaters are only approved for installation/warranty in the US/Canada. Installing outside of US/Canada will void the Bosch Tankless warranty.