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10 Best Tankless Water Heaters - Holiday Sale
Best Choice01RinnaiRINNAI RX199iN Condensing Tankless Water Heater RX199 Features 0.96 UEF with 199k BTU.
Main highlights- Smart Sense -Gas Control System
- Smart Connect - Rinnai Central App - Setup, Service & Troubleshoot
- Quick Flush - Simplified Flushing
- One model - Indoor/Outdoor, Natural Gas/Propane
- Industry leading 2" venting up to 75 feet; Recirculation: Field convertible with Internal Pump kit; Versa Vent - Outdoor Vent Adaptor and Lime Detection
9.8Exceptional
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- 02thermomate
ThermoMate 113,000 BTU 4.7 GPM Natural Gas Tankless Water Heater, High Efficiency Instant On-Demand Hot Water for Whole House Use, Indoor Residential Water Heater with Multi-Point Simultaneous Heating
Free ShippingMain highlights- [Smart Diagnostic Display] - Equipped with a 3.5-inch LED touchscreen, it allows you to effortlessly adjust and monitor output water temperature（90°F to 140°F）while providing real-time tracking of water flow, fan operation, and flame status. Advanced error code technology enables rapid diagnosis of water heater malfunctions. The UL-certified 120V/5-foot power cord ensures continuous power supply for real-time monitoring systems.
- [Safety & Reliable] - The gas tankless water heater comes standard with a range of safety features including boil-dry burning protection, Freeze protection, Flame out protection, Overheating Protection, Over temperature protection, Timeout protection, Pipe blockage protection, High-Temperature Lock Protection, Excessive Air Pressure Protection.
- [Energy Efficient & Save Money] - The heat exchanger is constructed from high-quality oxygen-free copper, providing superior thermal conductivity and corrosion resistance compared to stainless steel. It achieves a thermal efficiency of 98% (vs. 80% for stainless steel models) and boasts a uniform energy factor (UEF) of 0.81. This design reduces energy waste, lowering annual operating costs by approximately 30% versus traditional systems.
- [Easy to Install & Save space] - The whole house tankless water heater features standard 3/4" NPT water inlet/outlet connectors, a 1/2" NPT gas inlet, a 3" OD vent, and a UL-approved 120V plug, ensuring compatibility with most households. With its compact dimensions of 21"H x 13"W x 7"D, the on-demand water heater requires less than one-third of the space occupied by traditional tank models, freeing up valuable room in your home.
- [4.7 GPM & 113,000 BTU] - The ThermoMate instant hot water heater delivers consistent hot water to 3-4 fixtures simultaneously, allowing you to have unlimited hot water on demand. No waiting time, no cold water shocks, perfect for busy households. Adopting advanced water flow sensor, the built-in chip can adjust the heating power 20,000 times per second, ensuring that the hot water within ±1℉ fluctuations for a comfortable shower experience.
9.7Exceptional
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- 03thermomate
Tankless Water Heater Electric for Sink Faucet, ThermoMate 4500W 110~120V Small Point of Use Instant Hot Water Heater CSA Approved with Temperature Display, Self-modulating, 0.85GPM at 35°F Rise
Free ShippingMain highlights- [Self-modulating Power] - Regulating the amount of energy required to heat water only when you need it with 99.8% efficient. 110-120V Hardwired
- [Long-lasting Quality] - Cast aluminum heating element separated from water line, significantly reducing scale, corrosion and mineral buildup. SUS 304 stainless steel water tube
- [Instant Sink Hot Water] - 4.5kw power heating system provides on demand hot water in seconds for point-of-use applications, perfect for under / over sink faucet. Temperature range from 85°F - 131°F. 24 Hours standby. 0.26GPM-1.0GPM
- Touch control panel and digital temperature display allowing adjustment in 1° increment. IP25 waterproof, Standard 1/2"NPT pipe fitting, pre-wired pigtail for easy installation
- Sleek Compact Size - 10.95" x 7.4" x 2.52", Small water heater fit in tight places within your home or business, like under cabinets and sinks, hair salons, bar counters and hotel receptions, saving valuable storage space
- Important Note - Please verify this unit is the right size for you: 4.5kW 120V ONLY Hardwired, requiring 40A Double Pole Circuit Breaker, 10AWG min wire size and 1/2"NPT water connections
9.4Excellent
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Value for Money04VEVORVEVOR Instant Water Heater, 8kw On Demand Electric Tankless Water Boiler, Digital Temperature Display & Easy Installation & 24-Hour Water Supply, for Kitchen Bathroom Shower Mall Salon ETL Listed
20% Off Free ShippingMain highlights- Tap to Control: Our electric water heaters are designed with LED displays and IMD touch screens that allow you to flexibly control the settings. Setting your preferred water temperature with precision.
- Safe to Use: The electric water heater comes with a thermostat function and over-temperature protection, so you don't have to worry about the temperature fluctuating too much in the shower. It's perfect for large families, busy households, or commercial establishments requiring a reliable supply of hot water.
- Know about Installation: Wall-mount design maximizes your living or working space. Our compact electric water heater comes with NPT 1/2'' water inlet and outlet. Please note that 1 x 40A circuit breakers and 1 x 10AWG power cables are required for installation, and we recommend seeking professional assistance.
- Instant Hot Water: The water heater is equipped with a high-performance cast aluminum heater, which effectively separates water and electricity, scale and corrosion resistant. Our electric water heater delivers hot water instantly, saving you time and minimizing water wastage. You can start enjoying ultimate relaxing and comfort in no time!
- Energy Efficiency: You're choosing a greener solution for your hot water needs. Forget about preheating! The electric water heater utilizes a 8kw heating system delivers endless hot water in seconds at temperatures ranging from 86-140℉ or higher.
9.2Excellent
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- 05DWALE
Tankless Water Heater Outdoor 4.21GPM, 16L Portable Gas-Fired Instant Shower, Propane Water Heater with Digital Display Multi-Protection for Camping Trips Boat, Cabins, RV, Barns
Free ShippingMain highlights- 【Premiun Water Heater】-Maximum power output 68000BTU/Hr, you will get instant endless hot water easily wherever you are. The maximum temperature raise is 167 °F (75 °C). Just need 3.6PSI of water pressure,4.21 gallons of hot water can be output per minute.This propane water heater is for propane(LPG) use only.
- 【Portable Design】- Featuring a compact, space-saving profile (21.65" H x 13.4" L x 5.9" W), the portable water heater is built for easy transport and setup. It's the ideal on-demand hot water solution for your RV, cabin, camping showers, or washing pets.
- 【Maintenance Tips】Before installing this camping water heater, carefully read the instruction manual. Always check for gas leaks before use. This camping water heater is recommended to use and store this water heater in a dry environment.
- 【Complete Accessories】-This tankless water heater comes with CSA certified Gas Regulator, 5 Spray Modes high pressure Shower Head with 59"(1.5m) extended Long Stainless Steel Hose and Shower Holder,There are three interface ports under propane water heater. The left one is the Air inlet. The middle one is the shower port,and The right one is the water inlet.
- 【Advanced Safety & Energy Efficiency】-The Tankless Water Heater with more safety protection such as flame failure device, anti-freezing protection,over heating protection. The Propane Water Heater exchanger and main burner are desinged with advanced combustion technology to decrease gas consumption and burning noise.Compact and lightweight structure with 11.5% energy saving technology,so you can get more hot water for less money.
8.9Very Good
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- 06Ranein
Ranein Electric Tankless Water Heater, 18kW 240V on Demand Instant Endless Water Heater with LED Temperature Display for Residential Whole House Shower, Space Saving
Free ShippingMain highlights- SIMPLE: The endless hot water heater electric features knob controls and an LED display. With an adjustment range from 86°F to 131°F in 1°F increments, just simply set the temperature and enjoy stable and ample hot water.
- SAVE: Compared to tank-type water heaters, electric tankless water heater don't require preheating. There's no energy consumption when not in use. It saves 60% of heating costs. Additionally, it's more compact and can be installed anywhere.
- SAFE: The instant electric tankless water heater is applied with multiple protections, like leakage protection, overheating protection, and drop test, damp proof, every unit electric tankless water heater goes through strict tests to ensure 100% safety and it is listed by CSA.
- POWERFUL: This electric water heater's on-demand thermal efficiency reaches up to 99%. With a flow rate of up to 4.3GPM, it's suitable for 2-3 usage points throughout the house. No waiting for preheating. Provides endless ample hot water.
- NOTE: Make sure this water heater tankless is sized for your hot water needs: 18 kW; 240 volts; circuit breaker required 2 x bipolar 40 amps; unit dimensions 13.8" x 3.1" x 18.7"; water connection 3/4" NPT.
8.8Very Good
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- 07thermomate
Tankless Water Heater Electric, thermomate 14kW at 240 Volt, On Demand Instant Hot Water Heater for Shower, Self-Modulating Save Energy, Save Space, 2.66GPM at 35°F Rise ET140
Free ShippingMain highlights- [Save Money and Space] - Self-modulating technology auto regulating the amount of energy required to heat water by continuously detecting water temperature and flow rate with 99% heating efficiency, saving up to 60% on water heating cost comparing to traditional tank water heater. 1/2"NPT connections and wall mounted compact size with no water tank, convenient for any spaces, saving floor space and fitting into tight spaces
- [On Demand Endless Hot Water] - Provide continuous endless hot water for residential house use. 24 hours standby. 14kW powerful heating support up to 2 faucets & 1 shower and large 2.66GPM at 35°F temperature rise. electronic temperature control adjustable in 1-degree increments from 86 to 131°F. Requires Double Pole 60Amp breaker
- [Leak Proof & Maintenance Free] - The first to use cast aluminum heating chamber, Heating element separated from water lines to prevent water leaking and scale & corrosion on heating element, ensuring high heating efficiency and extending usage life span
- [Installation] - 14 kilowatts at 240V draws max 58amp, 1/2” NPT male ports, 6AWG wire to 60AMP Double-pole breaker, ideal for providing hot water for a bathroom, small sink, office break room and other point-of-use or low-flow applications
- [Easy Installation & Safety Protection] - ETL Listed to UL-499 and CAN/CSA-C22.2 No. 64 with overheating protection, auto stop heating when detecting no water, quality workmanship for leakage protection
8.7Very Good
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- 08GasBRUH
Tankless Water Heater Outdoor, 1.58 GPM, 6L Portable Propane Camping Water Heater with Overheating Protection for Indoor,RV,Camping
Free ShippingMain highlights- Versatile Portable Water Heater: This portable camping water heater is perfect for outdoor showers or off-grid living, providing you with a fantastic hot water experience while camping, hiking, fishing, or relaxing at the beach. It's also ideal for use with a portable hot water sink, RV, SUV, or MPV. Plus, you can conveniently use it to wash your pets with ease
- Note: The blue inlet hose is not included. Please prepare a compatible water inlet hose separately.
- Lightweight & Portable Water Heater : The 10 pounds lightweight portable water heater's folding handle keeps it out of the way and enables easy carry. Use the handle of the portable propane water heater or the mounting bracket on the back to hang it. It is idea for outdoor showers.
- Installation and Usage tip: Read the instructions before install the camping water heater，Always check gas leakage before operation. The minimum starting water pressure for the water heater is 3.6 PSI. The temperature reaches 114.8℉ (46℃) at its highest point and 46.4℉ (8℃) at its lowest point at a flow rate of 1.58 GPM for our water heater.
- Efficient & Eco-Friendly Propane Water Heater: Our propane tankless water heater with cutting-edge combustion innovation, delivers a robust 41,000 BTU/hour output while minimizing fuel usage and operational noise. Whether you're on the road or off-grid, relish the luxury of continuous, on-demand hot water. Plus, with our energy-efficient design, you'll enjoy up to 10% savings on energy costs, making every journey more sustainable and economical.
- 6-in-1 Protection Outdoor Water Heater: GasBRUH water heater is 6-in-1 Protection, including anti-freezing protection, over-heating protection, low water flow protection, dry combustion protection, high water pressure protection and flame failure device.
8.6Very Good
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- 09Ranein
Electric Tankless Water Heater, 14kW 240V on Demand Instant Endless Water Heater with LED Temperature Display for Residential Whole House Shower, Space Saving
Free ShippingMain highlights- 【Simple】It features knob controls and an LED display. With an adjustment range from 86°F to 131°F in 1°F increments, you simply set the temperature and enjoy stable and ample hot water
- 【Save】Compared to tank-type water heaters, it doesn't require preheating. There's no energy consumption when not in use. It saves 60% of heating costs. Additionally, it's more compact and can be installed anywhere
- 【Safe】Heating elements are separated from water to prevent scale buildup. It has features like leakage protection, overheat protection, and automatic shutdown to ensure safety during use
- 【Powerful】Its thermal efficiency reaches up to 99%. With a flow rate of up to 3.6GPM, it's suitable for 2-3 usage points throughout the entire house. No waiting for preheating. Provides endless ample hot water
- 【Note】Make sure this water heater is sized for your hot water needs: 14 kW; 240 volts, circuit breaker required 1 x 60 amps; unit dimensions 10.7" x 14.25" x 3.22"; water connection 1/2" NPT.
8.5Good
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- 10lianfengymx
lianfengymx Tankless Water Heater Electric 3000W 110V, Instant Hot Water Under Sink for Kitchen Bathroom RV, Vertical Mount Compact Heater with Digital Display & Stainless Steel Design（White）
Free ShippingMain highlights- 【MULTI-SAFETY PROTECTION (IPX4)】Built-in overheating auto-shutoff, dry-fire prevention, and splash-proof housing protect both you and your home. Safe and reliable for kitchen, bathroom, or RV applications.
- 【EASY VERTICAL INSTALLATION (DIY-FRIENDLY)】Compact design mounts vertically under any sink (7.8"x4.3"x2.6"), saving space in kitchens, bathrooms, or RVs. Includes screws and clear manual—easy setup in minutes for DIY users.
- 【DURABLE STAINLESS STEEL CONSTRUCTION】304 stainless steel inner tank resists corrosion and rust for long-term reliability. Brass connectors prevent leaks, ensuring stable performance in humid environments.
- 【3000W INSTANT HEATING (110V)】Delivers hot water in 3 seconds — no preheating, no waiting. Ideal for kitchen or RV sink use (max 1.0 GPM). Operating range: 20–55°C / 68–131°F. Not for shower use.
- 【 SMART TEMPERATURE CONTROL】Digital display with real-time temperature monitoring. Flow-Temp logic: Lower flow = higher outlet temperature for consistent comfort. One-touch adjustment keeps your water at the perfect level year-round.
8.4Good
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