10 Best tankless water heater

[Max 5 GPM & 113,000 BTU] - The ThermoMate instant hot water heater can supply two showers simultaneously, each delivering 105°F water at a flow rate of 2 GPM, based on an inlet water temperature of 65°F. 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.

[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.

[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.

[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.

𝐔𝐋𝐓𝐑𝐀-𝐂𝐎𝐌𝐏𝐀𝐂𝐓 𝐃𝐄𝐒𝐈𝐆𝐍: This compact instant hot water heater features a robust ABS casing and solid brass inlet/outlet fittings, ensuring durability and excellent corrosion resistance. LED display showing real-time water temperature. Slim, elegant design fits perfectly under sinks. Operates on 110V plug-in power. Note: Ideal for hand washing/sink use; the portable water heater not suitable for showering (requires ≥ 1.8 GPM)

𝐈𝐍𝐈𝐍𝐒𝐓𝐀𝐍𝐓 & 𝐏𝐎𝐖𝐄𝐑𝐅𝐔𝐋 𝐇𝐎𝐓 𝐖𝐀𝐓𝐄𝐑: The 3000W electric water heater delivers instant, continuous hot water with a temperature rise up to 122° F at 0.5 GPM. Can be adjusted directly via the faucet or flow control valve, large water flow and low temperature, small water flow and high temperature. The tankless electric water heater can set Fahrenheit or Celsius degrees by holding a power button for 6 seconds

𝐌𝐔𝐋𝐓𝐈-𝐋𝐀𝐘𝐄𝐑𝐄𝐃 𝐒𝐄𝐂𝐔𝐑𝐈𝐓𝐘 𝐏𝐑𝐎𝐓𝐄𝐂𝐓𝐈𝐎𝐍: Electric tankless water heaters achieve up to 98% thermal efficiency, delivering significant energy savings. Equipped with multiple safety protections, including IPX4 water resistance, leakage protection, dry-burn protection, water/electricity isolation, and automatic overheat shutdown. Designed to ensure safe operation in diverse indoor environments

𝐄𝐀𝐒𝐘 𝐕𝐄𝐑𝐓𝐈𝐂𝐀𝐋 𝐈𝐍𝐒𝐓𝐀𝐋𝐋𝐀𝐓𝐈𝐎𝐍: The on demand water heater features a compact design, making it ideal for kitchens, apartments, RVs, and camping. Includes English instructions, mounting screws, and a 1/2-inch NPT standard connection. Water heaters require dedicated wiring for safe operation, use ≥ 2.5 mm² wire and connected to trip switches of over 32A for use. Important: Must be installed vertically to prevent E2 fault

𝐎𝐔𝐓𝐒𝐓𝐀𝐍𝐃𝐈𝐍𝐆 𝐂𝐔𝐒𝐓𝐎𝐌𝐄𝐑 𝐒𝐄𝐑𝐕𝐈𝐂𝐄: We provide prompt and friendly customer support to assist you with any questions regarding this compact water heater. Should you encounter any issues while using your tankless water heater, feel free to contact us at any time. We will respond quickly and provide you with a solution

【Premium Water Heater】-This tankless water heater with CSA Certified Regulator, featuring enhanced safety protections including a flame failure device, overheat protection. Requires only 3.6 PSI of water pressure to operate and delivers 4.74 gallons of hot water per minute. Capable of a maximum temperature rise of 167°F. Designed for use with Propane (LPG) only.

【Efficient & Energy Saving】- This propane water heater’s heat exchanger and main burner utilize advanced combustion technology to reduce gas consumption and lower operating noise. With a maximum output of 68,000 BTU/hour, enjoy endless hot water instantly, wherever you are. Its compact and lightweight build incorporates 11.5% energy-saving technology, delivering more hot water while spending less.

【Portable Design】 - Compact and lightweight, this portable water heater is easy to transport, allowing you to enjoy a refreshing hot shower after a long day of camping, inside your RV, or while bathing your pet. With dimensions of 24.2 x 5.9 x 13.4 inches and powered by 2 D-cell batteries.

【Complete Accessories】- This tankless water heater includes a CSA-approved 5FT gas regulator, a high-pressure showerhead with 5 spray modes, a 59-inch (1.5m) stainless steel hose, and a shower holder. Beneath the unit, you’ll find three clearly marked ports: left for air intake, middle for the shower connection, and right for water inlet.

【Wide Usage】- Ideal for camping, hiking, fishing, beach trips, outdoor showers, portable sinks, or use in RVs, SUVs, and vans. This camping heater is also great for washing pets. Always check for gas leakage before each use to ensure safety.

【Premium Water Heater】-This tankless water heater with CSA Certified Regulator, featuring enhanced safety protections including a flame failure device, overheat protection. Requires only 2.5 PSI of water pressure to operate and delivers 4.21 gallons of hot water per minute. Capable of a maximum temperature rise of 167°F. Designed for use with Propane (LPG) only.

【Efficient & Energy Saving】- This propane water heater’s heat exchanger and main burner utilize advanced combustion technology to reduce gas consumption and lower operating noise. With a maximum output of 68,000 BTU/hour, enjoy endless hot water instantly, wherever you are. Its compact and lightweight build incorporates 11.5% energy-saving technology, delivering more hot water while spending less.

【Portable Design】- Compact and lightweight, this portable water heater is easy to transport, allowing you to enjoy a refreshing hot shower after a long day of camping, inside your RV, or while bathing your pet. With dimensions of 21.65x5.9x13.4 inches and powered by 2 D-cell batteries.

【Complete Accessories】- This tankless water heater includes a CSA-approved 5FT gas regulator, a high-pressure showerhead with 5 spray modes, a 59-inch (1.5m) stainless steel hose, and a shower holder. Beneath the unit, you’ll find three clearly marked ports: left for air intake, middle for the shower connection, and right for water inlet.

【Wide Usage】- Ideal for camping, hiking, fishing, beach trips, outdoor showers, portable sinks, or use in RVs, SUVs, and vans. This camping heater is also great for washing pets. Always check for gas leakage before each use to ensure safety

[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

[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

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

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

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

[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

[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

[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

[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

ON/OFF Dial Control with adjustable digital temperature display

Self-modulating power control

11kW Model Flow Rate: up to 2.68 GPM

Side 1/2" NPT water connections

On demand, consistent and continuous hot water

【Propane Water Heater】 - This tankless water heater includes a CSA-approved regulator and multiple safety features such as a flame failure device, anti-freeze protection, and overheating protection. It can be used with 2GPM water pump, Comes with 2 pieces of extension hose and fittings,your don't need to buy extra accessories.output 2.11 gallons of hot water per minute, with a maximum temperature rise of 167°F,Designed for use with propane (LPG) only.

【Portable Design】 - Our portable hot water heaters are compact and lightweight with folding handles for easy portability. Our Propane Water Heater Perfect for grid cabin,It comes with a showerhead and a pet showerhead and extension hose, ensuring you have the right tool for personal showers and bathing your pets,allowing you to enjoy an amazing hot shower after a long day of camping,Dimensions: 20.5 x6.3 x 12.6 inches. The outdoor water heater is powered by 2 "D" cell batteries.

【Efficient & Energey Saving】-The on demand hot water heater propane exchanger and main burner are desinged with advanced combustion technology to decrease gas consumption and burning noise.Maximum power output 68000btu/hour, you will get instant endless hot water easily wherever you are.Compact and lightweight structure with 11.5% energy saving technology,so you can get more hot water for less money.

【Complete Accessories】 - This tankless water heater comes with a CSA-approved 5FT gas regulator and a high-pressure shower head with 5 spray modes. Also included are a 8 spray pet showerhead, a 2GPM water pump with dual power options (10ft alligator clip cable and 23ft cigarette lighter cable), 4 pipe adapters, and 2 hoses. The dual power options for the water pump allow for flexible charging and usage, whether you're near a vehicle or using a battery setup.

【Widely Application】-Our propane shower is mainly used for outdoor showering with hot water,provides you a safe and comfortable hot shower at anytime and anywhere, Compact and space-saving design is portable for the outdoors, which bringing an amazing hot shower for you when you are camping, hiking, fishing, beaching, grid cabin etc. Besides, you can also wash your pets with this tankless water heater, DO NOT TWINE TEFLON TAPE between gas regulator and gas inlet pipe. Always check gas leakage before operation.