10 Best Gas Water Heater of December 2025

• V65iN HE High Efficiency Tankless Hot Water Heater - Natural Gas: Indoor Installation Only
• Up to 6.5 GPM hot water flow rate (varies by groundwater temp)
• Control-R 2.0 mobile app features timers and schedules throughout the day and allows you to remotely put the system into vacation mode.
• Endless hot water for your entire home
• Residential Factory Warranty - 120 months (heat exchanger), 12 months (labor), 60 months (parts)

Rinnai

• RU199iN Sensei SE+ Super High Efficiency Tankless Hot Water Heater - Natural Gas: Indoor Installation Only
• Up to 11 GPM hot water flow rate (varies by groundwater temp)
• 15,000 BTU (Minimum) / 199,000 BTU (Maximum)
• Circ-Logic technology allows you to set recirculation patterns that coincide with your typical habits. Hot water is available when you need it!
• Endless hot water for your entire home
• Residential Factory Warranty - 120 months (heat exchanger), 12 months (labor), 60 months (parts)

Rinnai

• Exclusive Water Savings technology conserving up to 1, 100 gallons per year
• 157, 000 BTU (gas consumed per hour)
• Exclusive Hot Start Programming minimizes cold water burst by staying in ready-fire state
• Recirculation pump ready kit ready
• For use outdoors with freeze protection up to -30 degrees
• Fuel Type: Natural Gas

Rheem

• Lifetime warranty
• Save up to 60-percent on your water heating cost with an ECOSMART electric tankless water heater
• Never run out of hot water with an ECOSMART tankless water heater
• Patented Self Modulating Technology and design
• ECOSMART tankless water heaters are 99.8-percent energy efficient.Uniform Energy Factor:0.98

Ecosmart

• [Ease to Use] For whole home on demand indoor use with safe, efficient power ventilation , perfect for any small homes, cabins or apartments.
• [Modern Design] Exclusive color digital temperature display for easy to read.
• [Saving More Energy] Eco and Full gas switch for energy saving and get ideal hot water temperature.
• [More Safety] Flame-out protection, anti-freezing protection, over-heating protection, air flow pressure switch protection to ensure the safety.
• [Controls Water Temperature Easily ] Uses standard 1/2" NPT water fittings and is equipped with easy to use manual water temperature controls.

CAMPLUX ENJOY OUTDOOR LIFE

• CONVENIENT HOT WATER HEATER: 7 gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it. Thermal efficiency is 98%. Dimensions : 17.5 W x 17.5 H x 14.5 D Inches
• INSTALLED VERTICALLY OR HORIZONTALLY: This larger model can be mounted vertically (7 gal. of water supply) or horizontally (5.1 gal. of water supply)- vertical orientation is installed with the cold and hot lines on top of the unit
• RELIABLE WATER SOURCE: Easily hard-wire the 7-gallon model to provide the on-demand reliable water source your home or office needs
• IMPORTANT INFORMATION: Heating capacity of 1440 watts and a temperature range of 65-145°F max. Operating pressure-150 psi. Water fittings-3/4 inch Male NPT. Electrical requirements (Amp 12A/Volts 120)
• EASILY MOUNTED: Can be shelf, wall or floor mounted (bracket included for vertical orientation only); simply tap into the cold water line and install the water heater directly at the sink to provide hot water

Bosch Thermotechnology

• Modulates heat output in response to the flow rate of water running through the unit.
• Power vented directly vertically (rooftop) or sideways (wall) via Stainless Steel CAT III Flue 3.5" Diameter Included (20")
• NATURAL GAS - European Model - Digital Display is in Celsius
• Delivers 6.6 gpm of hot water with a 35°F Instant Temperature Rise (Equivalent to 5.5gpm with a 45F temp Rise)
• Certified for Installation in Manufactured (Mobile) Homes Pure Copper Heat Exchanger

GASFLEX

• Blue Diamond glass coating provides superior corrosion resistance to industry-standard glass lining
• Self-powered electronic gas valve uses thermopile to generate power needed to operate the electronic gas control without requiring external power
• Internal microprocessor provides enhanced operating parameters and tighter differentials for precise sensing and faster heating response
• Dynaclean diffuser dip tube helps reduce lime and sediment buildup, maximizes hot water output; made from long-lasting PEX cross-linked polymer
• Meets all current regulations set forth by the National Appliance Energy Conservation Act (NAECA)

A. O. Smith

• Endless hot water for your entire home
• V65eN HE High Efficiency Tankless Hot Water Heater - Natural Gas: Outdoor Installation Only
• Up to 6.5 GPM hot water flow rate (varies by groundwater temp)
• Control-R 2.0 mobile app features timers and schedules throughout the day and allows you to remotely put the system into vacation mode.
• Residential Factory Warranty - 120 months (heat exchanger), 12 months (labor), 60 months (parts)

Rinnai

• 【Enjoy & Comfortable Constant Hot Water】This residential model is powered by 120 VAC voltage, features imported PCB with precise temperature control, never blow hot and cold in turn, on-demand hot water, double adjustment of water and air, and rising of the third gear making it perfect for a hot shower at home! Camplux CA528 can produce a quick endless hot shower for years to come! Also features an installation hardware pack for easy mounting (φ3" Stainkless Vent Pipe is not included.)
• 【Advanced Safety Features】 CSA certified balanced combustion design required air combustion from the outdoor and the combustion city produced by the smoke forced out of the outdoor to ensure fresh indoor air, safe and reliable use. Features CO multiple protection ensures safety, equipped with PCB start up self-test &real-time intelligent monitoring, timely warning of potential gas fire and hydro power to ensure your family's safety. Automatically activates on water pressure between 7.0-150 PSI.
• 【Smart& Energy Saving】PCB frequency conversion intelligent control, temperature intelligent adjustment, environmental protection and durability, truly outstanding energy saving. Man-machine dialogue, heating without waiting. This residential constant model saves time, money and energy while producing safe, endless hot water for whole home!
• 【High Thermal Efficiency & High-Rise Wind Resistance】Phosphorus deoxidized copper heat exchanger with high temperature and corrosion resistance technology for full combustion and high thermal efficiency up to 92% . It can resist grade 8 wind speed and 240Pa high anti-wind pressure. Additionally, a wind pressure sensor is added to perceive the external wind force in real time and automatically adjust the fan, flame and maintain stable combustion.
• 【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.

CAMPLUX