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10 Best Ng Tankless Water Heaters - Holiday Sale
Best Choice01GASLANDNatural Gas Tankless Water Heater, GASLAND CE686NG Up to 7.6 GPM 199000 BTU Indoor Installation Instant Residential Natural Gas On-Demand Tankless Hot Water Heater
Free ShippingMain highlights- Unlimited Hot Water On Demand -- Unlike traditional tank water heaters, our tankless gas water heater provides unlimited hot water whenever you need it. No more waiting for the water to reheat — enjoy continuous hot water for showers, laundry, or washing dishes without interruption.
- U.S.-Based Customer Support & Warranty -- We stand behind our products with a comprehensive warranty. If your water heater stops working within a year, we’ll replace it for free. Our dedicated U.S.-based customer support team is always ready to assist you with any questions.
- Space-Saving Design & Easy Installation -- Say goodbye to bulky water tanks! Our compact, suitcase-sized design fits easily into small spaces like closets, basements, or laundry rooms. Enjoy more room for your home while our easy-to-install wall-mounted unit provides on-demand hot water wherever you need it.
- Long-Lasting Durability & Reliability -- Built to last, our tankless water heater has a lifespan twice that of traditional tank heaters. With fewer parts and no tank to leak, it’s easier to maintain and repair. Plus, it’s designed for year-round reliability with built-in safety features like overheat protection, flame-out protection, and freeze protection.
- Energy Efficient & Eco-Friendly -- With an industry-leading UEF of 0.8, our tankless water heater is 34% more energy-efficient than a 50-gallon tank water heater, whose UEF is only 0.6. Save on your energy bill while reducing NOx greenhouse gas emissions by 65% compared to a 50-gallon gas tank. It’s better for the environment and your wallet!
9.8Exceptional
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- 02ONSEN
ONSEN 26L Natural Gas Residential Tankless Water Heater - 6.9 GPM, 180K BTU Indoor Heater with Direct Vent System - Freeze Protection, Electronic Ignition, CSA-Approved for USA & Canada
Free ShippingMain highlights- Smart Digital Controls – Simple to operate with a digital LED display and three preset temperature modes, giving you precise and customizable hot water control for everyday comfort.
- Requires a minimum 3/4-inch gas supply line for proper operation — 1/2-inch lines cannot provide sufficient gas flow for the 180,000 BTU heating capacity.
- Instant Hot Water On Demand – Enjoy endless hot water for your home, townhouse, or cottage with our high-performance 180,000 BTU natural gas tankless water heater, delivering up to 6.9 gallons per minute (GPM) for 2-bathroom households.
- Energy Efficient Performance – Engineered with electronic ignition and no standing pilot light, this energy-saving tankless water heater operates only when hot water is needed, using only an average of 48W of power on 120V.
- Direct Vent System - Our water heater is equipped with a direct vent system, which draws in outside air for combustion, maximizing efficiency and allowing safe installation in compact indoor spaces like closets. (Wall vent and air intake kits – 3" diameter – sold separately.)
- Certified Safe & Reliable – CSA-approved for use in the USA and Canada, featuring built-in freeze protection, overheat prevention, and auto-shutdown in case of accidental flameout for year-round peace of mind.
9.6Exceptional
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Value for Money03RaneinRanein Natural Gas Tankless Water Heater, Indoor Max 7.4 GPM, 190,000 BTU Instant Hot Water Heater
20% Off Free ShippingMain highlights- 【Wide Application】130,000 BTU high heating capacity and maximum 5.3 GPM. It is suitable for 3-5 outlet points, which can satisfy whole family
- 【Note】We provide a 2-year warranty for the water heater. If you encounter any issues, please contact us. In cold weather, if the water heater is not used for a long time, the pressure relief valve needs to be opened to drain the remaining water in the water heater. This product is not recommended for use in areas over 2,000 feet
- 【No Waiting Required】Unlike traditional tank water heaters, tankless water heaters eliminate the need for a 30-minute preheating wait time, allowing you to have unlimited hot water on demand.
- 【Fans Placed Underneath】It will be more secure in terms of safety, and no smoke backflow will occur. The blower has large power and can automatically adjust the rotating speed according to the change of external wind pressure and the change of water temperature to provide sufficient oxygen for gas combustion, ensuring full combustion and safer use. Low noise and longer service life
- 【Easy to Assemble and Use】Uses standard 1/2" NPT water inlet fittings and 3/4" NPT air inlets for quick installation. Its compact size of 23.15"L x 14.17" W x 5.9"H takes up almost no space. If you have any questions about installation and operation, please do not hesitate to contact us and we will serve you wholeheartedly
9.5Excellent
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- 04Ranein
2025 GEN II Ranein Natural Gas Tankless Water Heater Max 4.3 GPM, 100,000 BTU Indoor On Demand Instant Hot Water Heater with LED Temperature Control Panel, Vent Pipe
Free ShippingMain highlights- 【Steady Temperature for Comfort】Advanced tech keeps water temperature stable, auto-adjusting flow and heat – no sudden changes, perfect for showers and daily use.
- 【Space-Saving for Small Areas】Compact wall-mounted gas tankless heater fits apartments/small homes/renovations – frees up floor space.
- 【Save Money on Extra Costs & Energy】Kit includes exhaust pipe (no extra purchase needed); its oxygen-free copper tank cuts heat loss to lower energy use, fitting standard 1/2" NPT water & gas ports.
- 【Professional Installation Note】Must be installed by licensed pros per local codes – not recommended for areas over 2,000 feet elevation.
- 【Multiple Smart Modes for Daily Needs】Comes with diverse smart modes: 4-Season (auto adapts to inlet temp), Kitchen (100°F adjustable), Bathtub (50-800L, full-water beep) – meets various daily hot water demands effortlessly.
- 【Energy-Saving to Cut Bills】Heats water on demand, reducing standby waste vs traditional tank heaters – lowers utility costs and supports eco-living.
- 【Endless Hot Water for Home Use】This 4.3 GPM, 100,000 BTU gas tankless heater supplies 2-3 taps (shower/kitchen/bar) – no more hot water shortages for daily household needs.
9.4Excellent
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- 05Ranein
Ranein Natural Gas Tankless Water Heater with Vent Pipe, Indoor Max 3.6 GPM, 80,000 BTU Instant Hot Water Heater
20% Off Free ShippingMain highlights- Save Money: The kit already includes the exhaust pipe, so you don't need to spend extra money on purchasing it separately. With an oxygen-free copper water tank, it reduces heat loss and lowers energy consumption. Applied with standard 1/2" NPT water fitting and gas inlet.
- Recommendation: We strongly advise that all installations of the device adhere to local building and plumbing regulations at the installation location, and should be carried out by licensed professionals. This product is not recommended for use in areas over 2,000 feet
- Performance: The on-demand tankless water heater boasts a heating capacity of 80,000 BTU and a hot water flow rate of 3.6 gallons per minute (GPM). It can provide continuous hot water for 2-3 water supply points, making it sufficient to meet the hot water needs of a household's bathroom, kitchen, and bar area.
- No Waiting Required: Unlike traditional tank water heaters, tankless water heaters eliminate the need for a 30-minute preheating wait time, allowing you to have unlimited hot water on demand.
9.3Excellent
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- 06Ranein
Ranein Natural Gas Tankless Water Heater with Vent Pipe, Indoor Max 4.3 GPM, 100,000 BTU Instant Hot Water Heater
16% Off Free ShippingMain highlights- Upgrade features: Four Seasons Function: Automatically adjust the water temperature output based on the seasonal water temperature changes. Kitchen Function: Default water output temperature is 100°F, suitable for kitchen use. Bathtub Function: Adjustable water output quantity with a reminder when the set output quantity is reached, catering to various environmental needs.
- Save Money: The kit already includes the exhaust pipe, so you don't need to spend extra money on purchasing it separately. With an oxygen-free copper water tank, it reduces heat loss and lowers energy consumption. Applied with standard 1/2" NPT water fitting and gas inlet.
- Recommendation: We strongly advise that all installations of the device adhere to local building and plumbing regulations at the installation location, and should be carried out by licensed professionals. This product is not recommended for use in areas over 2,000 feet
- Performance: The on-demand tankless water heater boasts a heating capacity of 100,000 BTU and a hot water flow rate of 4.3 gallons per minute (GPM). It can provide continuous hot water for 2-3 water supply points, making it sufficient to meet the hot water needs of a household's bathroom, kitchen, and bar area.
- No Waiting Required: Unlike traditional tank water heaters, tankless water heaters eliminate the need for a 30-minute preheating wait time, allowing you to have unlimited hot water on demand.
9.2Excellent
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- 07thermomate
ThermoMate Natural Gas Tankless Water Heater, Up to 2.93 GPM High-Efficiency Instant Hot Water for Bathroom & Kitchen, 75,000 BTU Residential Indoor on-Demand Hot Water Heater, Multiple Points of Use
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 indoor residential hot 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.
- [2.93 GPM & 75,000 BTU] - The ThermoMate instant hot water heater delivers consistent hot water to 1-2 fixtures simultaneously, allowing you to have unlimited hot water on demand. No waiting time, no cold water shocks, perfect for the bathroom or kitchen. 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.
9.1Excellent
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- 08CAMPLUX ENJOY OUTDOOR LIFE
CAMPLUX 3" Horizontal Stainless Steel Vent Pipe Kit for Indoor Gas Tankless Water Heater
Free ShippingMain highlights- Wall Mount Water Heater Vent Kit is supplied with all the necessary components for a quick and seamless installation, corrosion-resistant and easy to clean.
- The wall thimble for through the wall use can expand about 7.8", stretchable from 3.9" to 7.8"
- Package：2 x vent pipe ø 3", 1 x wall thimble, 1 x termination hood with backflow preventer, 1 x 90° elbow.
- Low resistance vent pipe kit is designed to prevent the entrance of debris or rain in to the vent, also provides low resistance to flue gas flow.
- Detachable horizontal vent pipe kit designed for indoor tankless water heater, can be assembled in lengths to suit your needs.
- Compatibility, the diameter of vent pipe is is ø 3", also suitable for CAMPLUX gas water heater CX264, CX360, CX422, CA422, CA528LP/NG, CA528GLP, CA528W-LP/NG, CA686W-LP/NG, safely exhausts spent air out of the system.
9.0Excellent
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- 09ONSEN
ONSEN 14L Natural Gas Direct Vent Tankless Water Heater - 3.6 GPM, 100K BTU - Hot Water On Demand - for Small Space Indoor Use - CSA-Approved for USA & Canada
15% OffMain highlights- SUPERIOR QUALITY: Get more with Onsen! Our indoor 14L Tankless Water Heater features an integrated control system with multiple protective functions to ensure safety and reliability—monitoring the temperature of the water being produced and adjusting the burner accordingly to deliver a stable hot water supply. While the LED Display and digital control panel allow you to view current settings and select outgoing temps and operational modes. CSA Certified for both the USA and Canada.
- ONSEN: Inspired by the thousands of natural hot springs found across Japan, Onsen Indoor Tankless Water Heaters bring the convenience and comfort of instant hot water to your tiny home, cabin, or cottage, whether you're on or off-the-grid.
- NATURAL GAS TANKLESS WATER HEATER: Enjoy hot water on demand, anytime! The Onsen 14L Tankless Water Heater turns cold water into instant hot water, heating up to 3.6 gallons of water per minute. Fueled by natural gas, this compact and energy-efficient residential tankless water heater offers an affordable hot water solution perfect for your one-bathroom apartment or small bungalow. For indoor use only.
- ELECTRONIC IGNITION: No pilot light or wasted gas! Unlike a traditional hot water heater, Onsen's indoor tankless water heater offers the ultimate convenience and energy savings for your cabin or home—only igniting and consuming gas when you turn on your tap, heating the incoming water via the copper heat exchanger. Unit plugs into a standard 120-volt electrical outlet with a UL-listed power cord.
- DIRECT VENT SYSTEM: Safe for small indoor spaces! Power vent systems waste more energy by drawing air from inside the house and venting outside. Onsen is designed with a direct vent system, pulling air from outside, efficiently burning with the natural gas, and then exhausting externally. This system is more efficient and allows for installation in smaller, restricted areas, such as a closet. Wall vent kit sold seperately.
8.9Very Good
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- 10CAMPLUX ENJOY OUTDOOR LIFE
Camplux Tankless Water Heater Natural Gas,3.18 GPM High Efficiency Instant Hot Water Heater with Celsius Digital Display,Residential Natural Gas Water Heater for 2-3 Persons Bathroom Indoor Use,Black
Free ShippingMain highlights- Sleek,Modern,Compact Design -Trendy and modern design with unique black glassy front panel featuring an easy to use LED touchscreen controls with Celsius Digital & Display.The compact size - (L)14.4 x (W)4.7 x (H)25.4 inch tankless water heater saves more space than traditional tanks.
- On-Demand Tankless Water Heater-High water capacity range 0.8 - 4.8 GPM, Camplux high efficiency 3.18 GPM natural gas tankless water heater delivers 3.18 gallons per minute of on-demand endless hot water ensures instant hot water for 2-3 persons home comfortable shower.
- Multiple Protection Ensure Your Safety- Dry combustion,flame failure device, anti-freezing protection, over heating protection to ensure your safety. Fully automatic temperature controls with an energy saving mode and child lock technology.
- Convenient, Easy Installation -Uses standard 1/2" NPT water fittings and comes with 2.3 inch horizontal venting pipe allowing for convenient and quick installation,great for whole home,small cabins and remote apartments use. You can take Camplux customized wall thimble-WT236 for perfect indoor use.
- Considerate Customer Service- Here at Camplux, customer service is everything! We offer 24 shift hours customer service make the customer experience easy and fast through our live chat, phone support & our online helpdesk.
8.8Very Good
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