{"product_id":"a-o-smith-ato-540h-n-199-000-btu-ati-540h-condensing-ultra-low-nox-indoor-tankless-water-heater","title":"A.O. Smith ATO-540H-N 199,000 BTU ATI-540H Condensing Ultra-Low NOx Indoor Tankless Water Heater","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe A.O. SMITH ATO-540H-N is a condensing ultra-low NOx indoor tankless water heater. This unit uses up to 199,000 BTU\/hr of natural gas to deliver an endless supply of hot water. It is highly efficient with a Uniform Energy Factor (UEF) of 0.93.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eContinuous flow rate up to 10.0 GPM\u003c\/li\u003e\n  \u003cli\u003ePrimary commercial-grade copper heat exchanger stabilizes outgoing water temperatures quicker\u003c\/li\u003e\n  \u003cli\u003eSecondary heat exchanger is made of 316L Stainless Steel to protect against corrosion\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eProduct Highlights\u003c\/h4\u003e\n\u003cp\u003eThis A.O. Smith tankless water heater provides years of hot water through innovation and quality. It is a residential product built to commercial-grade standards.\u003c\/p\u003e\n\u003ch3\u003eProduct Information\u003c\/h3\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: A.O. SMITH\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: ATO-540H-N\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e: US\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct Type\u003c\/strong\u003e: Tankless Heater\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInstallation Type\u003c\/strong\u003e: Indoor Only\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType\u003c\/strong\u003e: Space Saving\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFuel Type\u003c\/strong\u003e: Natural Gas\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBTU Input\u003c\/strong\u003e: 199,000\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBTU (Min)\u003c\/strong\u003e: 15000\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVent Type\u003c\/strong\u003e: Direct Vent\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnergy Factor\u003c\/strong\u003e: 0.93\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGas Connection\u003c\/strong\u003e: 3\/4\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWater Connection\u003c\/strong\u003e: 3\/4\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVoltage\u003c\/strong\u003e: 120\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication\u003c\/strong\u003e: Residential\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax Flow (GPM)\u003c\/strong\u003e: 10\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInlet Gas Pressure\u003c\/strong\u003e: 4.0-10.5\"W.C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDepth (Inches)\u003c\/strong\u003e: 11.25\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth (Inches)\u003c\/strong\u003e: 17.75\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight (Inches)\u003c\/strong\u003e: 23.625\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlow Rate at 70F Temp Rise (GPM)\u003c\/strong\u003e: 5.4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlow Rate at 40F Temp Rise (GPM)\u003c\/strong\u003e: 9.5\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlow Rate at 50F Temp Rise (GPM)\u003c\/strong\u003e: 7.5\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlow Rate at 60F Temp Rise (GPM)\u003c\/strong\u003e: 6.3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUEF\u003c\/strong\u003e: 0.95\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum BTUs\u003c\/strong\u003e: 199,000\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower Source\u003c\/strong\u003e: gas_powered\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWater Connection Location\u003c\/strong\u003e: Bottom\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEmissions\u003c\/strong\u003e: Ultra-Low NOx\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eASME Certified\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDigital Display\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eENERGY STAR\r Certified\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGPM (@67 F Temp Rise)\u003c\/strong\u003e: 5.8 GPM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum BTUs\u003c\/strong\u003e: 15,000\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct Tier\u003c\/strong\u003e: ProLine\r XE\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSide Loop\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eItem Type\u003c\/strong\u003e: Water Heater\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGallons\u003c\/strong\u003e: Tankless\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWater Heater Type\u003c\/strong\u003e: Residential\/Commercial\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVenting\u003c\/strong\u003e: Power Direct Vent\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVenting Type\u003c\/strong\u003e: Power Direct Vent\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnergy Star\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnection Size\u003c\/strong\u003e: 3\/4\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eActivation GPM\u003c\/strong\u003e: 0.5\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDuct Size\u003c\/strong\u003e: 3\" Round, 4\" Round\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Flow Rate\u003c\/strong\u003e: 9.5 GPM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Flow Rate\u003c\/strong\u003e: 4.9 GPM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Gas Input\u003c\/strong\u003e: 15000\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVent Maximum Run\u003c\/strong\u003e: 1200, 840 in.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWater Pressure (Max)\u003c\/strong\u003e: 150 PSI\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWater Pressure (Min)\u003c\/strong\u003e: 15 PSI\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGas Connection Type\u003c\/strong\u003e: 3\/4\" NPT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeating Technology\u003c\/strong\u003e: Condensing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIndoor Installation\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNatural Gas Pressure (Max)\u003c\/strong\u003e: 10.5\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAltitude Certification\u003c\/strong\u003e: 6000 ft.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAmperage\u003c\/strong\u003e: 0.74\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCondensing\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDefault Temperature\u003c\/strong\u003e: 122\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApproved for Commercial Use\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCertifications\u003c\/strong\u003e: AHRI, ANSI, CSA, NSF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCollection\u003c\/strong\u003e: ProLine\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow Lead Compliant\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMade in America\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMobile Home Approved\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutdoor Approved\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct Variation\u003c\/strong\u003e: Whole House Water Heater\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSCAQMD Compliant\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTitle 20 Compliant\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpecial Feature\u003c\/strong\u003e: Air-Fuel ratio (AFR) sensor\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Type\u003c\/strong\u003e: Copper, Stainless Steel\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"A.O. SMITH","offers":[{"title":"Default Title","offer_id":51108651270450,"sku":"ATO-540H-N","price":1396.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/303601894.jpg?v=1777392795","url":"https:\/\/voomisupply.com\/products\/a-o-smith-ato-540h-n-199-000-btu-ati-540h-condensing-ultra-low-nox-indoor-tankless-water-heater","provider":"Voomi Supply","version":"1.0","type":"link"}