AO Smith . ATO-540H-P

Features: Never run out of hot water again with a steady 10 GPM flow rate Conveniently mounts to your wall for a low profile installation Comes packaged with a wall-mount remote controller with advanced diagnostics tracking Can be used with either Category III or IV power direct venting in either a 3" or 4" size Electronic ignition ensures you never have to mess with a pilot light again Complies with lead-free standards Protected by a multitude of built-in safety features such as an overheat cutoff fuse, constant temperature monitoring, and air fuel ratio rod Includes a 15-year limited on the heat exchanger (6-year in commercial applications) and a 5-year on all parts Easily link up to 4 units without needing additional parts or accessories, and up to 20 units with the TM-MC01 (sold separately) Durable heat exchanger is constructed of commercial-grade copper resulting in greatly increased heat transfer and resistance to erosion Designed for outdoor use only Specifications: Height: 23-5/8" Width: 17-3/4" Depth: 11-1/4" Max BTU Input: 199000 Maximum Flow Rate: 10 GPM Fuel Type: Liquid Propane Energy Factor: 0.95 Altitude Certification: 6000 Feet Above Sea Level Product Variations: ATO-240H-P: 6.6 GPM Outdoor Tankless Water Heater ATO-340H-P: 8 GPM Outdoor Tankless Water Heater ATO-540H-P (This Model): 10 GPM Outdoor Tankless Water Heater