{"product_id":"mizudo-4-3-gpm-tankless-water-heater-indoor-natural-gas-100-000-btu-120v-new","title":"Mizudo 4.3 GPM Tankless Water Heater Indoor Natural Gas 100,000 BTU 120V New - FDG-CS100W-NG","description":"\u003ch2\u003eMizudo 4.3 GPM Tankless Water Heater Indoor Natural Gas 100,000 BTU 120V New - FDG-CS100W-NG\u003c\/h2\u003e\n\u003cdiv\u003eThe Mizudo indoor tankless water heater is a compact, efficient solution for small homes, apartments, and cabins, delivering 4.3 GPM of continuous hot water with 100,000 BTU. Its sleek design includes a touch panel LED display, supports simultaneous water supply for \u003cspan\u003e2 to 3 water points\u003c\/span\u003e\u003cspan\u003e, and precise temperature control. The heater features an oxygen-free copper heat exchanger for durability, and a high-speed anti-backflow fan. With over 50% space savings compared to traditional heaters. Specifications include 120V power, and wall-mounted installation.\u003c\/span\u003e\n\u003ch5\u003e\u003cbr\u003e\u003c\/h5\u003e\n\u003ch5\u003eWhat our Experts Think\u003c\/h5\u003e\n\u003cdiv class=\"flex flex-col text-sm pb-25\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-WEB:b54ca8ef-a994-4034-b185-6784d9c5fcc0-30\" data-testid=\"conversation-turn-60\" data-scroll-anchor=\"true\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"7f962c42-d5b3-47b2-814e-16adf3e9cf65\" data-turn-start-message=\"true\" dir=\"auto\" data-message-model-slug=\"gpt-5-mini\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert w-full wrap-break-word light markdown-new-styling\"\u003e\n\u003cul data-start=\"27\" data-end=\"2106\"\u003e\n\u003cli data-section-id=\"4svf3b\" data-start=\"27\" data-end=\"480\"\u003e\n\u003cstrong data-start=\"29\" data-end=\"68\"\u003eReliable on‑demand hot water supply\u003c\/strong\u003e\u003cbr data-start=\"68\" data-end=\"71\"\u003eThe \u003cstrong data-start=\"77\" data-end=\"174\" data-is-only-node=\"\"\u003eMizudo 4.3 GPM Tankless Water Heater Indoor Natural Gas 100,000 BTU 120 V New – FDG‑CS100W‑NG\u003c\/strong\u003e delivers \u003cstrong data-start=\"184\" data-end=\"231\"\u003econtinuous hot water without a storage tank\u003c\/strong\u003e, eliminating standby heat loss and providing instant supply as needed. Its \u003cstrong data-start=\"307\" data-end=\"353\"\u003e100,000 BTU output and up to ~4.3 GPM flow\u003c\/strong\u003e can support \u003cstrong data-start=\"366\" data-end=\"401\"\u003emultiple fixtures (2–3) at once\u003c\/strong\u003e, depending on inlet water temperature. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1lpv60g\" data-start=\"482\" data-end=\"759\"\u003e\n\u003cstrong data-start=\"484\" data-end=\"516\"\u003eCompact, space‑saving design\u003c\/strong\u003e\u003cbr data-start=\"516\" data-end=\"519\"\u003eWall‑mounted and non‑condensing at approximately \u003cstrong data-start=\"570\" data-end=\"590\" data-is-only-node=\"\"\u003e20.5″ × 13″ × 7″\u003c\/strong\u003e, it frees up space compared with traditional tank heaters and is suitable for apartments, tiny homes, or residential indoor use. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"btnmf0\" data-start=\"761\" data-end=\"1012\"\u003e\n\u003cstrong data-start=\"763\" data-end=\"800\"\u003eEfficient \u0026amp; certified performance\u003c\/strong\u003e\u003cbr data-start=\"800\" data-end=\"803\"\u003eWith a \u003cstrong data-start=\"812\" data-end=\"858\" data-is-only-node=\"\"\u003eUEF over 0.81 and CSA safety certification\u003c\/strong\u003e, this unit balances \u003cstrong data-start=\"879\" data-end=\"942\"\u003estable hot water delivery with reasonable energy efficiency\u003c\/strong\u003e for everyday household needs. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"71oo89\" data-start=\"1014\" data-end=\"1235\"\u003e\n\u003cstrong data-start=\"1016\" data-end=\"1047\"\u003ePrecise temperature control\u003c\/strong\u003e\u003cbr data-start=\"1047\" data-end=\"1050\"\u003eThe \u003cstrong data-start=\"1056\" data-end=\"1075\" data-is-only-node=\"\"\u003eLED touch panel\u003c\/strong\u003e allows settings from ~95 °F to 149 °F with accurate control and minimal fluctuation, improving comfort and consistency. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1ch7gqa\" data-start=\"1237\" data-end=\"1520\"\u003e\n\u003cstrong data-start=\"1239\" data-end=\"1281\"\u003eDurable build with protection features\u003c\/strong\u003e\u003cbr data-start=\"1281\" data-end=\"1284\"\u003eBuilt‑in protections (anti‑scale, overheat, dry combustion, flame failure) and \u003cstrong data-start=\"1365\" data-end=\"1401\" data-is-only-node=\"\"\u003eoxygen‑free copper heat transfer\u003c\/strong\u003e enhance reliability and longevity compared with many traditional tank systems. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"sh05r4\" data-start=\"1522\" data-end=\"1813\"\u003e\n\u003cstrong data-start=\"1524\" data-end=\"1555\"\u003eEasy plumbing compatibility\u003c\/strong\u003e\u003cbr data-start=\"1555\" data-end=\"1558\"\u003eStandard \u003cstrong data-start=\"1569\" data-end=\"1626\" data-is-only-node=\"\"\u003e¾″ NPT water and gas connections and 3″ power venting\u003c\/strong\u003e make it compatible with typical indoor installations, though \u003cstrong data-start=\"1688\" data-end=\"1741\"\u003eprofessional installation is strongly recommended\u003c\/strong\u003e for safety and code compliance. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1u4aj2x\" data-start=\"1815\" data-end=\"2106\"\u003e\n\u003cstrong data-start=\"1817\" data-end=\"1854\"\u003eBest for moderate residential use\u003c\/strong\u003e\u003cbr data-start=\"1854\" data-end=\"1857\"\u003eExperts recommend this heater for \u003cstrong data-start=\"1893\" data-end=\"1932\" data-is-only-node=\"\"\u003esmall‑to‑medium homes or apartments\u003c\/strong\u003e where reliable, continuous hot water is needed and space efficiency, simpler plumbing setup, and consistent performance are priorities. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003ch5\u003e\n\u003cbr\u003eQ\u0026amp;A\u003c\/h5\u003e\n\u003cp data-start=\"149\" data-end=\"438\"\u003e\u003cstrong data-start=\"149\" data-end=\"235\"\u003eQ: What is the \u003cstrong data-start=\"166\" data-end=\"232\"\u003eMizudo FDG‑CS100W‑NG 4.3 GPM Natural Gas Tankless Water Heater\u003c\/strong\u003e?\u003c\/strong\u003e\u003cbr data-start=\"235\" data-end=\"238\"\u003eA: A \u003cstrong data-start=\"243\" data-end=\"295\"\u003enatural gas‑powered indoor tankless water heater\u003c\/strong\u003e that provides on‑demand hot water without a storage tank, designed for residential indoor installations. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"440\" data-end=\"711\"\u003e\u003cstrong data-start=\"440\" data-end=\"482\"\u003eQ: How much hot water does it deliver?\u003c\/strong\u003e\u003cbr data-start=\"482\" data-end=\"485\"\u003eA: Up to \u003cstrong data-start=\"494\" data-end=\"526\"\u003e4.3 gallons per minute (GPM)\u003c\/strong\u003e of continuous hot water at a \u003cstrong data-start=\"556\" data-end=\"571\"\u003e100,000 BTU\u003c\/strong\u003e rating, suitable for supplying \u003cstrong data-start=\"603\" data-end=\"634\"\u003e2–3 fixtures simultaneously\u003c\/strong\u003e, depending on inlet water temperature. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"713\" data-end=\"935\"\u003e\u003cstrong data-start=\"713\" data-end=\"746\"\u003eQ: Where can it be installed?\u003c\/strong\u003e\u003cbr data-start=\"746\" data-end=\"749\"\u003eA: Installed \u003cstrong data-start=\"762\" data-end=\"790\"\u003eindoor‑mounted on a wall\u003c\/strong\u003e, compatible with \u003cstrong data-start=\"808\" data-end=\"846\"\u003e3\/4″ NPT gas and water connections\u003c\/strong\u003e and a \u003cstrong data-start=\"853\" data-end=\"870\"\u003e3″ power vent\u003c\/strong\u003e system for proper venting. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"937\" data-end=\"1172\"\u003e\u003cstrong data-start=\"937\" data-end=\"973\"\u003eQ: How efficient is this heater?\u003c\/strong\u003e\u003cbr data-start=\"973\" data-end=\"976\"\u003eA: It features a \u003cstrong data-start=\"993\" data-end=\"1034\"\u003eUniform Energy Factor (UEF) over 0.81\u003c\/strong\u003e, meaning efficient gas usage and reduced energy waste compared with traditional tank water heaters. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1174\" data-end=\"1389\"\u003e\u003cstrong data-start=\"1174\" data-end=\"1215\"\u003eQ: How is the temperature controlled?\u003c\/strong\u003e\u003cbr data-start=\"1215\" data-end=\"1218\"\u003eA: Offers \u003cstrong data-start=\"1228\" data-end=\"1267\"\u003eprecise digital temperature control\u003c\/strong\u003e with a range of about \u003cstrong data-start=\"1290\" data-end=\"1306\"\u003e95 °F–149 °F\u003c\/strong\u003e, and an LED touch panel for easy adjustment. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1391\" data-end=\"1704\"\u003e\u003cstrong data-start=\"1391\" data-end=\"1447\"\u003eQ: What safety and durability features are included?\u003c\/strong\u003e\u003cbr data-start=\"1447\" data-end=\"1450\"\u003eA: Includes \u003cstrong data-start=\"1462\" data-end=\"1499\"\u003eanti‑scale\/anti‑freeze protection\u003c\/strong\u003e, \u003cstrong data-start=\"1501\" data-end=\"1522\"\u003eoverheat shut‑off\u003c\/strong\u003e, \u003cstrong data-start=\"1524\" data-end=\"1549\"\u003edry combustion safety\u003c\/strong\u003e, \u003cstrong data-start=\"1551\" data-end=\"1573\"\u003eleakage protection\u003c\/strong\u003e, and \u003cstrong data-start=\"1579\" data-end=\"1618\"\u003eaccidental flame failure protection\u003c\/strong\u003e—and is \u003cstrong data-start=\"1626\" data-end=\"1643\"\u003eCSA certified\u003c\/strong\u003e for safety compliance. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1706\" data-end=\"1942\"\u003e\u003cstrong data-start=\"1706\" data-end=\"1751\"\u003eQ: What size and connections does it use?\u003c\/strong\u003e\u003cbr data-start=\"1751\" data-end=\"1754\"\u003eA: Dimensions approx. \u003cstrong data-start=\"1776\" data-end=\"1796\"\u003e20.5″ × 13″ × 7″\u003c\/strong\u003e, with \u003cstrong data-start=\"1803\" data-end=\"1841\"\u003e3\/4″ NPT gas and water connections\u003c\/strong\u003e and supports standard residential water pressure (15‑150 PSI). \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1944\" data-end=\"2188\"\u003e\u003cstrong data-start=\"1944\" data-end=\"1973\"\u003eQ: Why choose this model?\u003c\/strong\u003e\u003cbr data-start=\"1973\" data-end=\"1976\"\u003eA: \u003cstrong data-start=\"1979\" data-end=\"2004\"\u003eCompact and efficient\u003c\/strong\u003e, it saves space vs. traditional tank heaters, delivers \u003cstrong data-start=\"2060\" data-end=\"2091\"\u003eendless hot water on demand\u003c\/strong\u003e, and supports multiple outlets for everyday household use. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch5\u003e\n\u003cbr\u003eMaintenance Tips\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli data-section-id=\"1ogmxp1\" data-start=\"207\" data-end=\"444\"\u003e\n\u003cstrong data-start=\"209\" data-end=\"234\"\u003eAnnual Flush\/Descale:\u003c\/strong\u003e Flush the heat exchanger yearly with a descaling solution to prevent mineral buildup and keep water flow and heating efficiency optimal (especially in hard‑water areas). \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"im0urp\" data-start=\"445\" data-end=\"617\"\u003e\n\u003cstrong data-start=\"447\" data-end=\"470\"\u003eClean Inlet Screen:\u003c\/strong\u003e Periodically check and rinse the cold‑water inlet filter to remove debris and protect internal components. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"qgctfs\" data-start=\"618\" data-end=\"826\"\u003e\n\u003cstrong data-start=\"620\" data-end=\"656\"\u003eInspect Gas \u0026amp; Water Connections:\u003c\/strong\u003e Check for leaks, corrosion, or loose fittings on gas and water lines; tighten or service as needed for safe, efficient operation. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"yrn6hr\" data-start=\"827\" data-end=\"990\"\u003e\n\u003cstrong data-start=\"829\" data-end=\"857\"\u003eVent \u0026amp; Air Intake Check:\u003c\/strong\u003e Ensure the venting system and air intake are unobstructed for proper combustion and exhaust. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"14v0be1\" data-start=\"991\" data-end=\"1187\"\u003e\n\u003cstrong data-start=\"993\" data-end=\"1022\"\u003eWipe Exterior \u0026amp; Controls:\u003c\/strong\u003e Clean the exterior with a soft cloth and monitor the LED display for error codes or irregularities; address issues promptly. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"n1i8xq\" data-start=\"1188\" data-end=\"1352\"\u003e\n\u003cstrong data-start=\"1190\" data-end=\"1222\"\u003eProfessional Annual Service:\u003c\/strong\u003e Have a qualified technician inspect and service the unit yearly for safety checks, gas pressure testing, and optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Mizudo","offers":[{"title":"Default Title","offer_id":45454230290492,"sku":"FDG-CS100W-NG","price":359.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/6151\/5324\/files\/FDG-CS100W-NG-1718311665524_d200baae-2fc9-4865-a8f2-a38217f8e194.png?v=1780122478","url":"https:\/\/e-powergo.com\/products\/mizudo-4-3-gpm-tankless-water-heater-indoor-natural-gas-100-000-btu-120v-new","provider":"Set Up Your Ultimate Retreat","version":"1.0","type":"link"}