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Best water heaters - Holiday Sale 2025

Last Updated - December 14, 2025

1
Best Choice

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Rinnai

NEW Rinnai RX199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 11.1 GPM, 199,000 BTU

Picked by 1963 people in the last week

Rinnai

$1,532.79

More Details
Main highlights
- Smart, Efficient Design: This water heater's modern design includes an easy-to-use interface, Quick Flush feature for simplified flushing, as well as a super-high energy efficiency factor of UEF .98; See Controlr module for WiFi control (not included)
- Professional Installation Recommended: Visit the Find a Rinnai PRO page on our website to find a qualified technician to install your tankless water heater, and use the Rinnai Central App for help with setup, service & troubleshooting; We do not recommend installing a water heater without a technician
- One Model, Anywhere: This Rinnai tankless water heater is installable indoors or outdoors thanks to our new Versa Vent and powered by either propane or natural gas thanks to a Smart Sense gas control system; RX-OVC vent cap required for outdoor install
- Never Run Out of Hot Water with this Compact Tankless Gas Water Heater: This condensing propane and natural gas tankless water heater from Rinnai is only the size of a small suitcase, but provides up to 11.1 GPM (7 fixtures at once)
- Find Your Rinnai: See our product guides, manuals, energy guide, warranty information, videos, and tables to find the right tankless water heater size for your home; Check our Ground Water Temperature Map to see if this heater is optimal for your region
$1,532.79
2

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Rheem

Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray

Rheem

$503.91

$546.86
(7% Off)

More Details
Main highlights
- PROVEN PERFORMANCE: Continuous hot water when you need it for the whole home (review performance guide image to confirm this water heater will provide the hot water needed based on geographic location). Ground water temperature impacts temperature rise and gallons per minute.
- ELECTRICAL REQUIREMENTS: 3 x 40 AMP Double Pole Breakers Required. 200 AMP Household service recommended. Ensure your home can accomodate the power supply and that enough space is available in your breaker panel for this unit.
- EFFICIENT: Tankless electric water heaters save space, energy, money, and require no venting.
- EASILY ADJUSTABLE: ON/OFF Dial Control with adjustable digital temperature display allows for adjustments in 1-degree increments from 80-140 degrees F.
$503.91
$546.86 (7% Off)
3
21% Off

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

COSORI
21% Off

Cosori Electric Kettle, No Plastic Filter & Spout, 1.8Qt Tea Kettle & Hot Water Boiler For Coffee & Tea, Water Heater & Teapot, Automatic Shut Off, Borosilicate glass, Black, 1500W

COSORI

$21.99

$27.99
(21% Off)

More Details
Main highlights
- Safe & Easy to Use—— Worry-free auto shut-off and boil-dry safety feature
- Plastic-Free Spout & Filter—— Glass spout and stainless steel filter prevent boiling water from touching plastic when pouring
- More Than Just a Kettle——Great for tea, coffee, and quick meals
- Modern Look—— Sleek design equipped with blue LED light that glows when boiling
- Faster Than a Stovetop Kettle—— Boils a full cup of water in under 3 minutes for less wait time
- Easy to Clean——Wide mouth and large-angle lid lets you reach every corner with ease
- Accurate Pouring——Precision spout and cool-touch handle help prevent spills and burns
$21.99
$27.99 (21% Off)
4
Best Value
23% Off

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

EcoSmart
23% Off

EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology

EcoSmart

$189.99

$249.00
(23% Off)

More Details
Main highlights
- Save Space; EcoSmart tankless electric water heaters are 90% smaller than traditional tank heaters; may be installed on wall or at point of use; Dimensions 11.5 x 8 x 3.75 inches
- Save Energy; EcoSmart tankless electric water heaters are 99% thermal energy efficient; Only heats water when called unlike a tank heater that maintains water temperature even when not being used.
- Endless On-Demand Hot Water; Consistent hot water when you need it that never runs out; Continuously monitored water temperature and controlled flow rates ensure efficiency and consistent performance within 1 degree of selected temperature.Amperage Draw : 54 A.Special Features: ‎Energy Efficient
- EcoSmart ECO 11 Sizing; 13-kilowatt tankless electric water heater ideal for providing hot water for a bathroom, small sink, office breakroom and other point-of-use or low-flow applications; provides between 1.3 and 3.1 gallons-per-minute depending on the inlet water temperature; refer to the sizing guide to select the proper solution
$189.99
$249.00 (23% Off)
5
23% Off

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

FIVECUBS
23% Off

Portable Water Heater 2000W, Pool Heater - Immersion Heater with Digital Thermometer, Upgraded Magnesium Oxide Heating for Fast Heating, for Small Pools, Bathtubs, Buckets, Tanks

FIVECUBS

$29.99

$38.99
(23% Off)

More Details
Main highlights
- 【ULTIMATE PORTABILITY FOR ANY SCENE】 Your go-to heating solution anywhere! This lightweight and compact immersion heater is ideal for camping, farms, garages, or bathrooms. Use it effortlessly as a hot tub heater for portable spas, a pool warmer for kiddie pools, or to heat water for chores and pets. Critical: Keep it 3+ feet away from gases or flammables during operation.
- 【SMART LCD TEMPERATURE MONITORING】 Precision heating at a glance! The built-in digital thermometer displays real-time water temperature, so you never have to guess. A clear power indicator light lets you know it's working. Just immerse, plug in, and monitor—it’s that easy! Always ensure no people or pets are in the water while this pool heater is running.
- 【RAPID 2000W HEATING POWER】 Say goodbye to cold water! Our 2000W high-efficiency portable water heater rapidly takes the chill off, warming up 5 gallons in just minutes. It's the perfect pool heater for inflatable pools, small stock tanks, and buckets. The perforated guard maximizes heat dispersion for faster, more even heating. Pro Tip: For larger tubs, use multiple units on separate circuits to speed up the process.
- 【PROFESSIONAL SAFETY & AUTO SHUT-OFF】 This immersion water heater is your ultimate safety partner. The intelligent system automatically powers off the 2000W heating element once water hits the perfect temp of 165°F (75°C), preventing scalding risks. The durable stainless steel build resists rust. Remember: Always fully submerge this bucket heater in water before plugging into a 110V outlet to avoid damage or fire hazard.
- 【COMPLETE KIT & WORRY-FREE WARRANTY】 Everything you need is in the box: the FIVECUBS immersion heater, LCD thermometer, and user manual. It makes a practical gift for anyone. Your satisfaction is 100% guaranteed. Our US-based support team is ready to assist you with any questions or needs.
$29.99
$38.99 (23% Off)

Best water heaters - Holiday Sale 2025

NEW Rinnai RX199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 11.1 GPM, 199,000 BTU

Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray

Cosori Electric Kettle, No Plastic Filter & Spout, 1.8Qt Tea Kettle & Hot Water Boiler For Coffee & Tea, Water Heater & Teapot, Automatic Shut Off, Borosilicate glass, Black, 1500W

EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology

Portable Water Heater 2000W, Pool Heater - Immersion Heater with Digital Thermometer, Upgraded Magnesium Oxide Heating for Fast Heating, for Small Pools, Bathtubs, Buckets, Tanks

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