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Software for permitting electronic devices to interact with a water heater; software for permitting a smart phone to interact with a water heater; downloadable software app for permitting an electronic device to interact with a water heater; downloadable software app for permitting a smart phone to interact with a water heater; electronic control device for interaction with a remotely located water heater; software for permitting electronic devices to interact with a tankless water heater; software for permitting a smart phone to interact with a tankless water heater; downloadable software app for permitting an electronic device to interact with a tankless water heater; downloadable software app for permitting a smart phone to interact with a tankless water heater; electronic control device for interaction with a remotely located tankless water heater; software for permitting remote monitoring of the functioning and use of water heaters; downloadable software app for permitting remote monitoring of the functioning and use of water heaters; electronic control device for remote monitoring of the functioning and use of water heaters; Software for permitting remote monitoring of the functioning and use of tankless water heaters; downloadable software app for permitting remote monitoring of the functioning and use of tankless water heaters; electronic control device for remote monitoring of the functioning and use of tankless water heaters