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10 Best ng tankless water heater in Canada
Best Choice01
NoritzNoritz NRC71DVNG Indoor Condensing Direct Vent Tankless Water Heater, 7.1 GPM - Natural Gas
Main highlights- Very high efficiency
- Low Nox
- Endless hot water
- Compact Space Saving Design
9.7Exceptional
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Value for Money02
NoritzNoritz GQ-C2859WX-FF US NG Direct Vent Easy Series Tankless Heater
Main highlights- Versatile applications as it can be installed direct vent (DV), single vent (sv), 2 inch flex vent (fsv) or outdoor (OD)
- Top mount water connections for easy tank replacement
- Min gas input: 18K BTU, max gas input: 180K BTU
- Max flow rate: 9.8 gpm
- Energy factor: 0.97
9.4Excellent
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- 03Ranein
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
Main 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.
9.1Excellent
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- 04GASLAND
GASLAND Gasmart E 199000 BTU Tankless Water Heater, Up to 7.6 GPM, Whole House Natural Gas Indoor Installation Residential On-Demand Instant Hot Water Heater, CE686NG
Main 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!
9.0Excellent
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- 05ONSEN
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
Main highlights- ENERGY SAVINGS – Electronic ignition with no pilot light and an average power draw of 30W (120V), so it only runs when hot water is needed.
- ENDLESS HOT WATER ON DEMAND – Ideal for 1-bath homes, apartments, tiny homes, cabins, and cottages, this direct vent natural gas tankless water heater delivers up to 3.6 GPM for unlimited hot water on demand.
- EASY TO USE CONTROLS – Digital control panel with LED display and 3 preset heating modes for simple, customizable temperature control.
- DIRECT VENT SYSTEM – Draws outside air for efficient combustion and safe indoor installation in smaller spaces such as closets. 3" wall vent & air intake kits sold separately.
- CSA CERTIFIED SAFETY – CSA approved for the USA & Canada with built-in safety features including over-heat protection and automatic shutdown in case of accidental flameouts.
8.9Very Good
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- 06Ranein
Ranein RV Tankless Water Heater 65,000 BTU, On-Demand Propane Hot Water, Thermostatic Mixing Chamber, 12V Powered, High Altitude Ready, CSA Approved, Ideal for Simultaneous Use and Family Use
Main highlights- 𝐓𝐡𝐞𝐫𝐦𝐨𝐬𝐭𝐚𝐭𝐢𝐜 𝐌𝐢𝐱𝐢𝐧𝐠 𝐂𝐡𝐚𝐦𝐛𝐞𝐫: Thermostatic Chamber Technology dynamically balances heat output to deliver stable water temperatures, reducing fluctuations caused by changing water demand and enabling reliable, simultaneous hot water use for the whole family.
- 𝐒𝐚𝐟𝐞 & 𝐑𝐞𝐥𝐢𝐚𝐛𝐥𝐞: Designed with a top-mounted exhaust fan to ensure stable combustion, plus flame failure protection with automatic gas shut-off. The integrated anti-freeze function activates below 42.8°F to protect internal components. CSA certified, with a built-in pressure relief valve included.
- 𝐑𝐕-𝐫𝐞𝐚𝐝𝐲 𝐃𝐞𝐬𝐢𝐠𝐧 & 𝟏𝟐𝐯 𝐏𝐨𝐰𝐞𝐫𝐞𝐝: 12V DC powered system integrates with RV electrical setups and supports common RV plumbing connections — designed specifically for rv living and travel trailers.
- 𝐎𝐱𝐲𝐠𝐞𝐧-𝐅𝐫𝐞𝐞 𝐂𝐨𝐩𝐩𝐞𝐫 𝐟𝐨𝐫 𝐃𝐮𝐫𝐚𝐛𝐢𝐥𝐢𝐭𝐲 & 𝐄𝐟𝐟𝐢𝐜𝐢𝐞𝐧𝐜𝐲: Built with an oxygen-free copper heat exchanger, this RV hot water heater delivers fast, efficient heat transfer and long-term durability. The corrosion-resistant copper structure ensures reliable performance over time.
- 𝐈𝐧𝐬𝐭𝐚𝐧𝐭 𝐂𝐨𝐧𝐭𝐢𝐧𝐮𝐨𝐮𝐬 𝐇𝐨𝐭 𝐖𝐚𝐭𝐞𝐫 — 𝐌𝐨𝐫𝐞 𝐏𝐨𝐰𝐞𝐫, 𝐌𝐨𝐫𝐞 𝐅𝐥𝐨𝐰: Powered by a 65,000 BTU high-output burner, this unit heats water faster than lower-BTU RV heaters, delivering stable temperatures even in cold weather. With up to 3.9 GPM, it provides stronger flow and pressure than low-flow models, supporting simultaneous faucet use without drop-off. Higher BTU and GPM ensure longer, uninterrupted showers with fewer temperature swings. Precision control from 95°F–124°F and staged combustion improve efficiency, prevent summer overheating, and extend propane runtime—ideal for RV families needing reliable hot water.
- 𝐈𝐝𝐞𝐚𝐥 𝐅𝐨𝐫: Full-time RVers who need reliable hot water, campers who enjoy extended showers, Cold climate travelers who need freeze protection and families or multiple users who need simultaneous hot water use.
- 𝐄𝐧𝐡𝐚𝐧𝐜𝐞𝐝 𝐟𝐨𝐫 𝐘𝐨𝐮𝐫 𝐂𝐨𝐧𝐯𝐞𝐧𝐢𝐞𝐧𝐜𝐞: The upgraded multi-function remote provides real-time visibility into gas consumption, voltage, water flow (GPM), and anti-freeze activation, and is optimized for reliable performance at altitudes up to 9,800 ft.
- 𝐄𝐚𝐬𝐲 𝐑𝐞𝐩𝐥𝐚𝐜𝐞𝐦𝐞𝐧𝐭: Fits standard RV cutouts and replaces most Suburban & Atwood 6/10/12-gallon tank water heaters with a 12.8" × 12.8" opening. Exterior door not included; optional door kits (15" × 15", 15" × 18", or 18" × 18") sold separately.
8.8Very Good
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- 07thermomate
ThermoMate Condensing Tankless Water Heater Natural Gas, Up to 5.28 GPM
Main 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.
- [Save 15% & Dual Heat Exchanger] - With potential savings of 15% compared to non-condensing units, this condensing tankless water heater delivers outstanding 0.86 UEF efficiency, dramatically reducing energy usage and operational expenses. The innovative dual heat exchange system combines a condensing heat exchanger with highly conductive oxygen-free copper to capture waste heat that conventional units lose, maximizing recovery.
- [Safety & Reliable] - This natural gas tankless water heater integrates 8 protections: boil-dry, freeze, flame-out, overheating, over-temperature, pipe blockage, high-temperature lock, and excessive air pressure. Equipped with 4 ceramic heating cores, it auto-activates frost protection when temperatures hit 41°F (5℃). The energy-smart system uses minimal electricity to generate gentle warmth, preventing pipe ice buildup without high energy costs.
- [Discharge and Treatment of Condensate Water] - As a condensing unit, this water heater produces mildly acidic condensate water that you will need to discharge into a drain. We recommend installing an economical external condensate neutralizer kit (not included) at the drainage point. This simple add-on neutralizes the acid, protecting your pipes from potential corrosion.
- [5.28 GPM & 114,000BTU] - The 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. For a comfortable shower experience with hot water fluctuations within ±1℉, the built-in chip works with an advanced water flow sensor to adjust the heating power 20,000 times per second.
8.7Very Good
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- 08GASLAND
GASLAND Gasmart E Natural Gas Tankless Water Heater Indoor, Up to 5.8 GPM 150,000 BTU, CSA Certified Whole House Installation Residential On-Demand Instant Hot Water Heater, CE528NG
Main 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.Certified by CSA and equipped with multiple safety features, it meets the highest safety standards for reliable operation.
- 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!
8.6Very Good
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- 09Bosch
Bosch Greentherm T9800 SE 160 Tankless Water Heater, 9 GPM Whole Home Hot Water System, Natural Gas or Propane Compatible, High-Efficiency Condensing Design, Indoor Wall Mount
Main highlights- Save Valuable Space Compact wall-mounted design frees up floor space while delivering powerful whole-home performance.
- Reduce Energy Waste High-efficiency condensing technology heats water only when needed, helping reduce standby energy losses compared with traditional tank water heaters.
- Natural Gas or Propane Flexibility Compatible with both natural gas and liquid propane installations, making it easier to integrate into existing home systems.
- Endless Hot Water for Large Homes Delivers up to 9 gallons per minute, providing continuous hot water for multiple showers, appliances, and faucets at the same time without waiting for a storage tank to recover.
- Advanced Comfort & Safety Controls Features electronic ignition, freeze protection, temperature stability control, onboard diagnostics, and digital temperature adjustment for dependable operation.
8.5Good
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- 10Eccotemp
Eccotemp 45H-NG Outdoor Natural Gas Tankless Water Heater
Main highlights- Flow rate of 6.8 GPM at 35 degree rise, 4.57 GPM at 45 degree rise, 2.6 GPM at a 70 degree rise
- Built-in antifreeze circuit
- 6.8 GPM, 110 volt power supply
- 5 year manufacturer warranty on parts, 10 year on heat exchanger
- 155,000 BTU
8.2Good
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