{"product_id":"mizudo-18kw-tankless-water-heater-instant-hot-water-endless-comfort","title":"Electric Tankless Water Heater 18kW 240V - Instant Endless Hot Water","description":"\u003cp\u003eIn this review of the Electric Tankless Water Heater 18kW 240V the bottom line is simple: this unit is best for households or small commercial spots that need reliable, on-demand hot water without a bulky tank. The reviewer found the standout reason to buy is the heater's fast, efficient heating and safety-minded design that separates water and electrical circuits, reducing electric leakage risk and scale buildup while delivering hot water above 120F in seconds.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeparated internal circuits:\u003c\/strong\u003e The internal water and electrical circuits are separated to reduce electric leakage risk and minimize scale buildup for longer, safer operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh heating efficiency:\u003c\/strong\u003e With about 98% heating efficiency the unit produces near-instant hot water so users can get hot showers and taps quickly without preheating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact footprint:\u003c\/strong\u003e At roughly 17.05in x 12.91in x 3.58in the slim design fits in cabinets, bathrooms, garages, or basements and frees up space compared with tank heaters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLED touch display:\u003c\/strong\u003e The digital display makes it straightforward to set and monitor the preferred water temperature for consistent comfort.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety certifications and protections:\u003c\/strong\u003e ETL certification and built-in protections cover leakage, overheating, high pressure, and dry-fire prevention for safer daily use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStrong flow capability:\u003c\/strong\u003e The heater supports up to 4.2 GPM, sufficient for 2 to 3 points of use like a shower and a faucet simultaneously in many setups.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis unit is aimed at homeowners, small offices, salons, or bars that need a compact, high-efficiency source of continuous hot water for showers and faucets without the space or energy penalty of a tank. It is particularly useful when the inlet temperature is moderate (for example around 67 Degree F), where the 18kW model can sustain one shower and one faucet at typical flows.\u003c\/p\u003e\n\u003cp\u003ePeople who should look elsewhere include large families needing simultaneous high-flow hot water across many bathrooms, or installations where 240V\/75A electrical capacity and a 2x40AMP breaker with 2 x 8 AWG wiring are not available or practical. Also consider a higher kW model if incoming water is very cold and multiple high-flow fixtures must run at once.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFast heating above 120F with very high efficiency for low energy waste.\u003c\/li\u003e\n\u003cli\u003eCompact, space-saving design that installs in tight locations.\u003c\/li\u003e\n\u003cli\u003eComprehensive safety features and ETL certification for reliable operation.\u003c\/li\u003e\n\u003cli\u003eLED digital control makes temperature adjustments easy and precise.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRequires a substantial electrical supply (18kW at 240V draws up to 75A) and specific breaker\/wire setup which may need electrical upgrades.\u003c\/li\u003e\n\u003cli\u003eMaximum flow of 4.2 GPM limits simultaneous high-demand use in larger homes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel Power\u003c\/td\u003e\n\u003ctd\u003e18kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e240Volt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Flow Rate\u003c\/td\u003e\n\u003ctd\u003e4.2 GPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Flow to Activate\u003c\/td\u003e\n\u003ctd\u003e0.66 GPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRequired Breaker\u003c\/td\u003e\n\u003ctd\u003e2 x 40AMP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire Gauge\u003c\/td\u003e\n\u003ctd\u003e2 x 8AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e17.05in x 12.91in x 3.58in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe MIZUDO 18kW electric tankless heater is a smart buy for small households and light commercial use that need instant, efficient hot water and have the electrical capacity to support it. Its safety features, compact size, and near-instant heating make it good value where space and energy savings matter, provided the installation meets the 240V and breaker requirements.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhat breaker and wiring are required?\u003c\/strong\u003e\u003cbr\u003eInstall with a 2 x 40AMP breaker and 2 x 8 AWG wiring; the unit draws a maximum of 75A at 240V.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat flow rate does the heater support?\u003c\/strong\u003e\u003cbr\u003eThe maximum flow rate is 4.2 GPM and the minimum flow to activate heating is 0.66 GPM.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow many points of use can it serve?\u003c\/strong\u003e\u003cbr\u003eThe 18kW model can provide hot water for about 2 to 3 points of use depending on inlet temperature and fixture flow rates.\u003c\/p\u003e","brand":"MIZUDO","offers":[{"title":"Default Title","offer_id":46795458871515,"sku":"B0CH39K31Q","price":289.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/512akJi8SwL._AC_SL1500.jpg?v=1747588041","url":"https:\/\/gearmusthave.com\/products\/mizudo-18kw-tankless-water-heater-instant-hot-water-endless-comfort","provider":"GearMustHave","version":"1.0","type":"link"}