Best Outdoor Tankless Water Heaters Updated May 2025
Advertiser disclosure About our rankings

Join the millions that have trusted BuyersGuide.org to help them make smarter buying decisions. Let our independent expert reviews and data-driven shopping recommendations help you find the one that's right for you.

Best Outdoor Tankless Water Heaters
2025 Buyer's GuideUpdated May 2025
Advertiser disclosure About our rankings
Sort by:
Best Overall
Best Value
Popular

9.9

1

9.9

CAMPLUX Tankless Water Heater Outdoor, 1.32 GPM Portable Propane Camping Water Heater, 5L, AY132, White
Works great
Water temperature
Ease of setup
Value for money
Shower size
Read Full Review
Picked by 180 people this month!
Picked by 180 people this month!
Picked by 180 people this month!
Best Overall
Best Value
Popular

9.9

1
CAMPLUX Tankless Water Heater Outdoor, 1.32 GPM Portable Propane Camping Water Heater, 5L, AY132, White
Works great
Water temperature
Ease of setup
Value for money
Shower size
Picked by 180 people this month!
Read Full Review

9.8

2

9.8

GASLAND BE158 Propane Tankless Water Heater 6L, Outdoor Portable Hot Water Heater, Overheating Protection, Easy to Install, Use...
Functionality
Ease of installation
Outdoor shower
Temperature control

9.8

2
GASLAND BE158 Propane Tankless Water Heater 6L, Outdoor Portable Hot Water Heater, Overheating Protection, Easy to Install, Use...
Functionality
Ease of installation
Outdoor shower
Temperature control

9.6

3

9.6

Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray
Ease of installation
Water supply
Value for money
Size
Quality

9.6

3
Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray
Ease of installation
Water supply
Value for money
Size
Quality

9.5

4

9.5

Rheem RTG-95XLN-3 High Efficiency Non-Condensing Outdoor Tankless Natural Gas Water Heater, 9.5 GPM
Functionality
Water heating
Save 11%
Save 11%

9.5

4
Rheem RTG-95XLN-3 High Efficiency Non-Condensing Outdoor Tankless Natural Gas Water Heater, 9.5 GPM
Functionality
Water heating
Save 11%

9.3

5

9.3

Rinnai V53DeN Natural Gas Tankless Water Heater - 5.3 GPM, Outdoor Installation
Functionality
Ease of installation
Heat efficiency
Value for money
Space saving

9.3

5
Rinnai V53DeN Natural Gas Tankless Water Heater - 5.3 GPM, Outdoor Installation
Functionality
Ease of installation
Heat efficiency
Value for money
Space saving

9.2

6

9.2

FOGATTI Natural Gas Tankless Water Heater - Outdoor Installation Up to 8.1 GPM, Gray Instant Hot Water Heater - Instagas Comfor...
Functionality
Ease of installation
Value for money
$80 Coupon
$80 Coupon

9.2

6
FOGATTI Natural Gas Tankless Water Heater - Outdoor Installation Up to 8.1 GPM, Gray Instant Hot Water Heater - Instagas Comfor...
Functionality
Ease of installation
Value for money
$80 Coupon
Premium Pick

9.1

7

9.1

NEW Rinnai RX199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 1...
Ease of installation
Heat capacity
Water temperature
Design
Works great
Energy efficiency
Premium Pick

9.1

7
NEW Rinnai RX199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 1...
Ease of installation
Heat capacity
Water temperature
Design
Works great
Energy efficiency

9.0

8

9.0

Rheem 18kW 240V Tankless Electric Water Heater, Gray
Ease of installation
Value for money
Space saving
Build quality

9.0

8
Rheem 18kW 240V Tankless Electric Water Heater, Gray
Ease of installation
Value for money
Space saving
Build quality

8.7

9

8.7

Tankless Water Heater 5.26GPM 20L Outdoor Portable GasHot Water Heater Instant Propane water heater with Digital Display Multi-...
Functionality
Ease of installation
Value for money

8.7

9
Tankless Water Heater 5.26GPM 20L Outdoor Portable GasHot Water Heater Instant Propane water heater with Digital Display Multi-...
Functionality
Ease of installation
Value for money

8.5

10

8.5

Propane Tankless Water Heater Outdoor - ORBEK 120,000 BTU Up to 5.1 GPM Outdoor Installation - CSA Certified On-Demand Instant ...
Functionality
Ease of installation
Build quality
Value for money
Fuel efficiency

8.5

10
Propane Tankless Water Heater Outdoor - ORBEK 120,000 BTU Up to 5.1 GPM Outdoor Installation - CSA Certified On-Demand Instant ...
Functionality
Ease of installation
Build quality
Value for money
Fuel efficiency

Our Top Choice

Best Overall
Best Value
Popular

9.9

1

9.9

CAMPLUX Tankless Water Heater Outdoor, 1.32 GPM Portable Propane Camping Water Heater, 5L, AY132, White
Works great
Water temperature
Ease of setup
Value for money
Shower size
Read Full Review
Picked by 180 people this month!
Picked by 180 people this month!
Picked by 180 people this month!
Best Overall
Best Value
Popular

9.9

1
CAMPLUX Tankless Water Heater Outdoor, 1.32 GPM Portable Propane Camping Water Heater, 5L, AY132, White
Works great
Water temperature
Ease of setup
Value for money
Shower size
Picked by 180 people this month!
Read Full Review
Related Categories
Outdoor Tankless Hot Water HeaterTankless Gas Water HeaterGas Tankless Water HeaterGas Water HeaterTankless Water Heater (All)Rinnai Tankless Water Heater
How We Rank
Expert Analysis
Our team of experts highlights useful information so you can easily compare products to find the one that's right for you.

Award-Winning Tech
Our technology analyzes thousands of purchase trends to bring you the top product recommendations.

Why Trust Our Reviews?
1,000,000+ shoppers use Buyer's Guide every week to find the best products and services online.

Learn more about our rankings.

Reliable, Safe & Secure
Helping millions of users make smarter purchases online.
Related Categories
Outdoor Tankless Hot Water HeaterTankless Gas Water HeaterGas Tankless Water HeaterGas Water HeaterTankless Water Heater (All)Rinnai Tankless Water Heater
Related Categories
Outdoor Tankless Hot Water HeaterTankless Gas Water HeaterGas Tankless Water HeaterGas Water HeaterTankless Water Heater (All)Rinnai Tankless Water Heater