NPE-A2 3.9 GPM Residential or Commercial Natural Gas Tankless Water Heater

Navien NPE-A2 simply a smarter hot water system for today's life styles. Navien ComfortFlow is the first to incorporate a built-in insulated buffer tank and recirculation pump. The insulated buffer tank enables the NPE-A2 to operate at minimal flow rates. The built-in recirculation pump allows the NPE-A2 to recirculate water either through an external recirc line or through existing supply lines while using NaviCirc, without the need for external pumps or controls.|Certified design according to ANSI Z21.10.3 - CSA 4.3 latest standards for both indoor or outdoor installations (with optional Outdoor Vent Kit)|Compatible with 1/2 in. gas pipe up to a length of 24 ft. using 3 in. PVC vent (with no elbows)|Built-in Advanced Multi-Lines Control Panel with setup wizard allows adjustment of temperature settings and displays of operating status and error codes|Intelligent preheating - recognizes hot water usage patterns to intelligently provide hot water when needed|Freeze Protection - maintains normal operatin during freezing ambient temperatures down to -5 degree F|Self-diagnostics|Displays temperature and water flow rate|Displays status of cascade operation|Convertible display from degree F to degree C|User friendly interface|Easy setup