10 Best Indoor Gas Tankless Water Heater - Top Rated And Buying Guide

Hot water without the wait - or the waste

Low operating cost - High energy efficiency and water savings setting

Space Savings - Compact, space-saving design. Perfect for a tank replacement.

Water & Gas Leak Detection will shut down unit and provide an error code

For Indoor use only

Endless Hot Water: Enjoy unlimited hot water flow throughout the house; compact, durable, and easy to install; professional installation recommended

Energy and Space Efficient: Space-saving design conserves energy as it heats only when necessary

Optimal Water Pressure: Up to 7 GPM hot water flow rate for a powerful, constant stream

Instant Heating: Equipped with Circ-Logic - Pair with an external pump to reduce wait time for hot water via scheduled or on-demand recirculation

Guaranteed to Last: 15-, 5-, and 1-year residential for heat exchanger, labor, and parts, respectively. Wifi monitoring.

Original Design: Tankless hot water heater only heats when necessary to conserve energy; For the latest in non-condensing technology and a cleaner layout that speeds up service and installation, check out our new RE180iN model

Never Run Out of Hot Water with this Compact Tankless Gas Water Heater: Non-condensing tankless hot water heater from Rinnai is only the size of a small suitcase and fits in a wide variety of spaces, but provides up to 7.5 GPM (5 fixtures at once)

Smart, Durable Design: Enhanced scale detection helps prevent serious, long-term damage to unit; Includes 15-, 5-, and 1-year residential guarantee for heat exchanger, labor, and parts, respectively; See Controlr module for WiFi control (not included)

Professional Installation Recommended: Visit the Find a Rinnai PRO page on our website to locate a qualified technician in your area to install your tankless water heater; We do not recommend installing a water heater without a technician

Find Your Rinnai: See our product guides, manuals, energy guide, warranty information, videos, and tables to find the right tankless water heater for your home; Check our Ground Water Temperature Map to see if this heater is optimal for your region

Original Design: Tankless hot water heater's Circ-Logic technology offers recirculation patterns that match your habits; For the latest in non-condensing technology that speeds up service and installation, check out our new RE180iN model

Never Run Out of Hot Water with this Compact Tankless Gas Water Heater: Non-condensing tankless hot water heater from Rinnai is only the size of a small suitcase and fits in a wide variety of spaces, but provides up to 9.8 GPM (6 fixtures at once)

Smart, Durable Design: Includes 12-, 5-, and 1-year residential guarantee and 5-, 5-, and 1-year commercial factory warranty for heat exchanger, labor, and parts, respectively; See Controlr module for WiFi control (not included)

Professional Installation Recommended: Visit the Find a Rinnai PRO page on our website to locate a qualified technician in your area to install your tankless water heater; We do not recommend installing a water heater without a technician

Find Your Rinnai: See our product guides, manuals, energy guide, warranty information, videos, and tables to find the right tankless water heater for your home; Check our Ground Water Temperature Map to see if this heater is optimal for your region

Hot water without the wait - or the waste

Low operating cost - High energy efficiency and water savings setting

Space Savings - Compact, space-saving design. Perfect for a tank replacement.

Water & Gas Leak Detection will shut down unit and provide an error code

For use indoor only

【Propane Tankless Water Heater】The propane water heater outputs 2.64 gallons of instant hot water per minute to meet your various demands, it starts up when water pressure between 3.6-110 PSI, low water pressure is perfect for apartment, farm, cabin, RV, barn, boat or anywhere you need endless fresh hot water. Now, bring the home hot water comfort indoors with GREATBEAR tankless propane water heater. (Important tips: vent pipe must be installed for indoor installation)

【On Demand Water Heater Propane】Maxium power output 68000btu/hour, you could expect decent hot water flow with the gas water heater. The best part is you can get instant and endless fresh hot water out of it at anytime you want, no preheating, GREATBEAR MT10 propane water heater provides 2.64GPM of endless hot water to ensures you get easy and perfect ending after whole day activity.

【Unique Propane Gas Water Heater】GREATBEAR aims at continuous innovation and improvement, so the all-in-one designed setting knob is introduced with the propane gas water heater. We believe that being simple and advanced is the best way of achieving being user-friendly. Gas& water, turn either knob anti-clockwise, you get higher temp out of it, turn clockwise, you get cooler temp.

【Safe Gas Water Heater】The safety of yours and your dear families is the first priority of GREATBEAR Appliances, so every piece of the MT10 water heater goes through multiples strict tests during manufacturing. Also, protection devices necessary for gas water heater are equipped with the water heater, including Flame Failure Protection,Over Heating Protection,Anti-freezing Protection,Dry Combustion Protection,Low Water Flow Protection and High Water Pressure Protection, you could count on us.

【Propane Water Heater Indoors】MT10 water heater is ideal for indoor installation, with an exhaust pipe to exhaust harmful gases to protect your family. And the propane hot water heater package comes with all you need to set the water heater system. The installation process could be done within 15 min after you go through the instruction manual as recommended. Now, turn on the tap to enjoy instant and fresh hot water with GREATBEAR.

3.18 GPM Instant Constant Water Heater -Camplux 3.18 GPM propane tankless water heater delivers 3.18 gallons per minute of on-demand endless hot water ensures constant comfortable instant hot water for 2-3 persons whole house. 3.18-GPM heater is activated by water flow rather than water pressure; Minimum activation water capacity rate: 0.65 GPM-4.8 GPM; Maximum input rating: 82,000 BTUs; Water connection location/size: Bottom/0.5-inch NPT.

Easy Installation -The tankless propane water heater uses standard 1/2" NPT water fitting and gas inlet. The gas water heater comes with 2.3" horizontal vent pipe for convenient and quick installation,great for whole home,small cabins and remote apartments use. You can take S/S wall thimble-WT236 for perfect indoor use. You will need a gas regulator ( Camplux model KR-106A )＆ 1 pc 5/8" NPT male to 1/2" BSP female gas connector adapter if you want to hook this water heater up to a propane tank.

Modern Design,Easy Operation -The tankless hot water heater has trendy and modern design with unique black glassy front panel，easy to control the water temperature with LED touchscreen (Fahrenheit and Celsius switch optional).The compact size water heater saves more space than traditional tanks.

Outstanding Features- The propane instant hot water heater comes with oxgen-free copper heat exchanger and v-type stainless steel burner,high heating efficiency up to 89.98 %; 90°wind isolation design, this tankless propane water heater can anti backflow wind in high floors, the S/S 2.36 ” vent pipe exhaust harmful gases quickly.

6-In-1 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.

Note- The standby electric power of the product is 2W, and the working electric power of the product is 42W. Propane gas input pressure is 0.4psi. There is a pressure relief valve at the water inlet of water heater. It is necessary to manually unscrew the pressure relief valve to drain the water inside the machine in time after using the machine to avoid freezing and blew up when the temperature is lower than 32 ° F in winter .

Compact Design,Saving Energy-The compact size - 12.8"(L)*5.91"(W)*20.28"(H) tankless water heater saves more space than traditional tanks.Trendy and modern design with fahrenheit digital temperature display.Eco and Full gas switch for energy saving and get ideal hot water temperature.

On-Demand Tankless Water Heater-Camplux high efficiency 2.64 GPM propane gas tankless water heater delivers 2.64 gallons per minute of on-demand endless hot water ensures instant hot water for any small homes, cabins or apartments.

Safety Features-Flame-out protection, anti-freezing protection(manual drainage needed),over-heating protection, air flow pressure switch protection to ensure the safety. Safe electronic ignition system, plugs into standard 120V electrical outlet with UL-listed cord.

Easy Installation -The propane water heater uses standard 1/2" NPT water fitting and gas inlet. Comes with 2" horizontal vent pipe,ensures efficient power ventilation. Minimum activation rate: 0.65 GPM; Maximum input rating: 68,000 BTU; Water connection location/size: Bottom/0.5-inch NPT. You will need a gas regulator ( Camplux model KR-106A )＆1 pc 5/8" NPT male to 1/2" BSP female gas connector adapter if you want to hook this water heater up to a propane tank.

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. Have a question? Give us a call at (844) 538-7475.

We recommend that all installations of units must be done in accordance with the local building and plumbing codes of the installation location and installation be done by a licensed professional.

The tankless design means you don't have to wait 30 minutes for preheating and unlimited use of hot water.

180,000 BTU high heating capacity and maximum 8.1 GPM. It is suitable for 3-5 outlet points, which can satisfy whole family. UEF over 0.82, the high energy conversion rate can effectively reduce energy loss.

Excellent quality CSA certified in the United States and Canada. Adopting the world's most advanced technology, superior safety and durability.

Using built in forced exhaust fan at the bottom ensures stable combustion and eliminates the influence of external wind. Compact design for easy installation.

Fogatti provide free replacement within 30 days, and 5 years warranty on heat exchanger and 2 years warranty on other parts. The above-mentioned labor costs extra from 31 days.

We recommend that all installations of units must be done in accordance with the local building and plumbing codes of the installation location and installation be done by a licensed professional.

The tankless design means you don't have to wait 30 minutes for preheating and unlimited use of hot water.

170,000 BTU high heating capacity and maximum 7.5 GPM. It is suitable for 3-4 outlet points, which can satisfy whole family. UEF over 0.82, the high energy conversion rate can effectively reduce energy loss.

Excellent quality CSA certified in the United States and Canada. Adopting the world's most advanced technology, superior safety and durability.

Using built in forced exhaust fan at the bottom ensures stable combustion and eliminates the influence of external wind. Compact design for easy installation.

Fogatti provide free replacement within 30 days, and 5 years warranty on heat exchanger and 2 years warranty on other parts. The above-mentioned labor costs extra from 31 days.