{"product_id":"jandy-jxtq400nnk-400k-btu-natural-gas-pool-heater-cupronickel-versaflo","title":"Jandy | JXIQ400NNK | JXiQ 400K BTU Natural Gas Pool \u0026 Spa Heater – Cupronickel Heat Exchanger, VersaFlo Integrated Bypass","description":"\u003cp\u003eThe \u003cstrong\u003eJandy JXTQ400NNK\u003c\/strong\u003e is a 400K BTU natural gas pool and spa heater from the JXiQ smart heater platform, built with a \u003cstrong\u003ecupronickel heat exchanger\u003c\/strong\u003e, polymer headers, and \u003cstrong\u003eVersaFlo Integrated Bypass factory installed\u003c\/strong\u003e. It is the model to choose when the water is salt chlorinated, chemically aggressive, or simply hard on standard copper tubes.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features and Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e399,000 BTU\/hr firing rate:\u003c\/strong\u003e Full 400K class output for large in-ground pools and pool\/spa combinations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCupronickel heat exchanger:\u003c\/strong\u003e Far more resistant to corrosion, scale, and low pH water than standard copper. The right pick for salt systems and high bather load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersaFlo Integrated Bypass, factory installed:\u003c\/strong\u003e Routes water through the heat exchanger only on a call for heat, then around it the rest of the time. Lets a variable speed pump run slower and cuts hydraulic loss.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSMART sensor package:\u003c\/strong\u003e Monitors inlet and outlet temperature rise to protect the heat exchanger from low flow damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow gas pressure switch:\u003c\/strong\u003e Blocks ignition when supply pressure is too low, a common cause of nuisance faults on long gas runs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAuto-sensing dual voltage:\u003c\/strong\u003e Detects 120V or 240V on power up. No jumper cards to flip and no wires to move.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLargest display in the industry:\u003c\/strong\u003e 50% larger screen showing up to 80 characters, plus estimated heat up time to setpoint.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth diagnostics:\u003c\/strong\u003e Full real time service data through the Fluidra Pro app.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomation ready:\u003c\/strong\u003e Works with Jandy AquaLink systems for remote control through the iAquaLink app.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSacrificial anode included:\u003c\/strong\u003e Pulls corrosive elements in the water away from the heat exchanger and other metal parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact and light:\u003c\/strong\u003e Fits a 2 ft x 2 ft pad and drops straight in as a MasterTemp or Max-E-Therm replacement with no plumbing changes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow NOx design:\u003c\/strong\u003e Meets strict air quality requirements, including California districts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersa Plumb ready:\u003c\/strong\u003e Sweep elbow included for tight, efficient equipment pad plumbing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManufacturer Part Number (MPN)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eJXTQ400NNK\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eJandy (Fluidra \/ Zodiac Pool Systems)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSeries\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eJXiQ Gas Pool \u0026amp; Spa Heater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e399,000 BTU\/hr (400K BTU class)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFuel Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNatural Gas\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHeat Exchanger\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCupronickel tubes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHeaders\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePolymer (non-ASME)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBypass\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVersaFlo Integrated Bypass, factory installed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThermal Efficiency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e83% to 84% depending on heat exchanger configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEmissions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLow NOx\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIgnition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHot surface electronic ignition\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVoltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120V \/ 240V auto-sensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWater Flow Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e30 GPM minimum, 100 GPM maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePlumbing Connections\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2 in. \/ 2.5 in. union connections\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVent Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8 in. Category I, 4 in. Category III\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGas Line Sizing (400 model, natural gas)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 in. up to 20 ft, 1-1\/4 in. up to 95 ft, 1-1\/2 in. up to 215 ft equivalent length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCabinet Dimensions (approx.)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e22.1 in. W x 26.5 in. D x 24.9 in. H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApprox. 126 lb unpackaged\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAltitude Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCSA certified to 4,500 ft above sea level\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCertifications\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCSA, Low NOx, DOE efficiency compliant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5 year limited heat exchanger warranty (non-ASME models with factory installed VersaFlo)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInstallation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eProfessional installation required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShipping\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFreight item\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Heater Is For\u003c\/h2\u003e\n\u003cp\u003eChoose the JXTQ400NNK over the standard copper JXIQ400NK when the pool runs a \u003cstrong\u003esalt chlorine generator\u003c\/strong\u003e, sits in a high mineral or coastal environment, sees heavy bather load, or has a history of premature heat exchanger failure. The cupronickel tubes cost more up front and pay for themselves in service life. If the job requires ASME certified bronze headers for a commercial permit, look at the JXIQ400NS instead.\u003c\/p\u003e\n\n\u003ch2\u003eSizing Guide\u003c\/h2\u003e\n\u003cp\u003eAt a 20°F temperature difference with no wind, a 400K BTU Jandy heater covers roughly 1,120 sq ft of pool surface. On spas, it raises a 400 gallon spa about 30°F in roughly 18 minutes and a 1,000 gallon spa in about 44 minutes with a cover on.\u003c\/p\u003e\n\n\u003ch2\u003eWhat Is Included\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eJandy JXiQ 400K BTU natural gas heater with cupronickel heat exchanger\u003c\/li\u003e\n\u003cli\u003eFactory installed VersaFlo Integrated Bypass\u003c\/li\u003e\n\u003cli\u003eSacrificial anode\u003c\/li\u003e\n\u003cli\u003eVersa Plumb sweep elbow, union nuts, caps, and O-rings\u003c\/li\u003e\n\u003cli\u003eInstallation and operation manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3\u003eWhat is the difference between the Jandy JXTQ400NNK and the JXIQ400NK?\u003c\/h3\u003e\n\u003cp\u003eBoth are 400K BTU natural gas JXiQ heaters with VersaFlo Integrated Bypass. The JXTQ400NNK uses a cupronickel heat exchanger, while the JXIQ400NK uses standard copper. Cupronickel resists corrosion from salt water, unbalanced chemistry, and low pH much better, so it lasts longer in demanding water conditions.\u003c\/p\u003e\n\n\u003ch3\u003eIs the Jandy JXTQ400NNK safe for a salt water pool?\u003c\/h3\u003e\n\u003cp\u003eYes. The cupronickel heat exchanger is the configuration Jandy recommends for salt chlorinated pools. Water chemistry still needs to stay balanced, since no heat exchanger material survives sustained low pH or salinity outside the recommended range.\u003c\/p\u003e\n\n\u003ch3\u003eHow big a pool will a 400,000 BTU heater handle?\u003c\/h3\u003e\n\u003cp\u003eA 400K BTU heater covers roughly 1,120 sq ft of pool surface at a 20°F temperature difference in calm conditions, and about 880 sq ft in 3.5 mph wind. Larger surface areas, exposed sites, and uncovered pools need more capacity or longer run times.\u003c\/p\u003e\n\n\u003ch3\u003eWhat size gas line does the JXTQ400NNK need?\u003c\/h3\u003e\n\u003cp\u003eFor natural gas, a 1 in. line works up to about 20 equivalent feet, 1-1\/4 in. up to about 95 feet, and 1-1\/2 in. up to about 215 feet. Add three feet of equivalent length for every elbow. Undersized gas lines are the leading cause of ignition faults on 400K heaters, so confirm supply pressure before startup.\u003c\/p\u003e\n\n\u003ch3\u003eDoes the JXTQ400NNK work with pool automation?\u003c\/h3\u003e\n\u003cp\u003eYes. The JXiQ platform is automation ready and pairs with Jandy AquaLink systems for control from the iAquaLink app. Pool professionals can also connect over Bluetooth for real time diagnostics in the Fluidra Pro app.\u003c\/p\u003e\n\n\u003ch2\u003eInstallation and Warranty Notes\u003c\/h2\u003e\n\u003cp\u003eThis heater must be installed and serviced by a qualified pool professional or licensed gas technician. Improper installation can void the manufacturer warranty. Jandy Trade Series Exclusive products carry warranty terms tied to the purchase channel. Call us at (818) 394-9123 before you order if you need warranty confirmation for your installation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eShips freight.\u003c\/strong\u003e Inspect the pallet before signing for delivery and note any damage on the delivery receipt.\u003c\/p\u003e","brand":"Jandy","offers":[{"title":"Default Title","offer_id":52684033196344,"sku":"JXIQ400NNK","price":4400.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0808\/6319\/9544\/files\/JXIQ400NK_2.png?v=1777922133","url":"https:\/\/appaetechpoolsupply.com\/products\/jandy-jxtq400nnk-400k-btu-natural-gas-pool-heater-cupronickel-versaflo","provider":"AppaeTech Pool Supply","version":"1.0","type":"link"}