Tankless Water Heaters
Best Small Propane Tankless Water Heater (2026): Our 4 Picks Ranked
As an Amazon Associate I earn from qualifying purchases. Specs below come from each product's Amazon listing; we do not test products in person.
For a small propane tankless water heater, the APUS leads with 80,000 BTU and 3.6 GPM for 2-3 water points in a 1-2 person home, with control from 95 to 149 degrees. The Rinnai gives 5.3 GPM in an outdoor unit. The GASLAND gives a portable outdoor choice at 15.12 lb.
Starting out? See the main guide: Best Tankless Water Heater
Top picks at a glance
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Best OverallAPUS Propane Tankless Water Heater9.8 View on Amazon -
9.7 View on Amazon -
Lightest PickGASLAND BE158S Tankless Water Heater Propane9.5 View on Amazon -
Highest Flow RateRinnai V53DeP Propane Tankless Water Heater9.2 View on Amazon
Compare the specs
Ranked on flow rate, temperature control from each listing, plus how many buyers have rated it. A dash (—) means we could not confirm that figure from the listing.
| Pick | Flow rate | Fuel | Temperature control | Weight | Warranty |
|---|---|---|---|---|---|
| 1. APUS Propane Tankless Water Heater | 3.6 GPM | Propane | Yes | 19.18 lb | 2-year |
| 2. Ranein Propane Gas Tankless Water Heater | 3.6 GPM | Propane | Yes | 18 lb | 2-year |
| 3. GASLAND BE158S Tankless Water Heater Propane | 1.58 GPM | Propane | Yes | 15.12 lb | 1-year |
| 4. Rinnai V53DeP Propane Tankless Water Heater | 5.3 GPM | Propane | — | 33 lb | — |
APUS Propane Tankless Water Heater
It pairs 80,000 BTU and 3.6 GPM for 2-3 water points with control from 95 to 149 degrees and freeze protection near 41 degrees.
- Flow rate: 3.6 GPM
- Fuel: Propane
- Temperature control
- 2-year warranty stated
Good for
- Owners of 1-2 person homes who need hot water for 2-3 points
- Buyers who want a wall-mount unit for a tiny home
Skip it if
- You need more than 3.6 GPM of flow
- You need hot water for more than 3 water points
It delivers 3.6 GPM at 80,000 BTU, with temperature control from 95 to 149 degrees, regulated within 1 degree of the selected setting, and a low-flow start at 0.53 GPM. The LED display shows the set temperature, and the copper heat exchanger pairs with segmented combustion. It measures 20.55 by 13.27 by 5.91 inches, weighs 19.18 lb, and carries a 2-year warranty, with indoor venting and gas work requiring a licensed professional.
Ranein Propane Gas Tankless Water Heater
It pairs 80,000 BTU and 3.6 GPM for 2-3 water points with dual heating chambers, 4 preset modes and a control lock.
- Flow rate: 3.6 GPM
- Fuel: Propane
- Temperature control
- 2-year warranty stated
Good for
- Owners of homes who need hot water for 2-3 points
- Buyers who want 4 preset modes and a control lock
Skip it if
- You live above 2,000 ft elevation
- You need more than 3.6 GPM of flow
It delivers 3.6 GPM at 80,000 BTU, with temperature control from 95 to 149 degrees and dual heating chambers. The oxygen-free copper heat exchanger pairs with an anti-freeze device that resists 14 degrees, and it includes an original vent pipe. It weighs 18 lb and carries a 2-year warranty, and installation by licensed professionals is required.
GASLAND BE158S Tankless Water Heater Propane
As the lightest pick, it gives 1.58 GPM at 41,000 BTU in a 15.12 lb portable outdoor unit.
- Flow rate: 1.58 GPM
- Fuel: Propane
- Temperature control
- 1-year warranty stated
- 15.12 lb, the lightest here
Good for
- Campers who want a portable outdoor unit for a shower
- Buyers who run a unit from a 20 lb propane tank
Skip it if
- You need more than 1.58 GPM of flow
- You need more than 41,000 BTU of output
It delivers 1.58 GPM at 41,000 BTU, with a digital display and temperature adjustment, and starts at 3.6 PSI of water pressure. It runs from a standard 20 lb liquid propane tank with electronic ignition powered by two D-cell batteries. The box includes a CSA certified gas regulator and hose, a 5-foot shower head, mounting hardware and a garden hose adapter, and it carries a 1-year warranty.
Rinnai V53DeP Propane Tankless Water Heater
As the highest flow rate pick, it gives 5.3 GPM for multiple appliances in a compact outdoor unit.
- Flow rate: 5.3 GPM, the highest here
- Fuel: Propane
Good for
- Households who need 5.3 GPM for multiple appliances
- Buyers who want an outdoor unit for tight spaces
Skip it if
- You need a unit lighter than 33 lb
- You need a wall-mount indoor cabinet
It delivers 5.3 GPM for multiple appliances, heating water on demand in a compact outdoor unit. It has scale detection features, and a qualified technician is recommended for installation. It weighs 33 lb.
How to choose
Match flow to water points
Flow rate, given in GPM, is gallons per minute. The APUS and Ranein give 3.6 GPM for 2-3 water points, while the GASLAND gives 1.58 GPM and the Rinnai gives 5.3 GPM. Count the shower, sink and other fixtures you run at once, then pick a flow figure that covers that count.
Check temperature control and freeze protection
Temperature control lets you set an output temperature instead of accepting whatever the burner gives. For cold weather, the APUS activates freeze protection near 41 degrees, the Ranein resists 14 degrees, and the GASLAND has anti-freezing protection. Draining a unit completely during extended non-use helps prevent freeze cracking for the APUS and Ranein.
Plan installation and venting
The APUS requires a licensed professional for indoor venting and gas work, while the Ranein calls for licensed professionals and is not for use above 2,000 ft elevation. The Rinnai is an outdoor unit with professional installation recommended, and the GASLAND is a portable outdoor unit that runs from a 20 lb propane tank. Match the unit type to where it will sit, and confirm venting, gas connection and elevation limits before you buy.
FAQ
What flow rate do I need for 2-3 water points?
The APUS and Ranein give 3.6 GPM for 2-3 water points. The Rinnai gives 5.3 GPM, and the GASLAND gives 1.58 GPM. Pick the flow figure that matches how many fixtures you run at once.
Can a small propane tankless heater work outdoors?
The GASLAND is a portable outdoor unit, and the Rinnai is an outdoor unit. The APUS and Ranein are indoor units. Match the unit type to where it will sit.
How cold can these heaters handle?
The APUS activates freeze protection near 41 degrees, the Ranein resists 14 degrees, and the GASLAND has anti-freezing protection. Drain a unit completely during extended non-use to prevent freeze cracking.
What comes with the GASLAND unit?
The box includes a CSA certified gas regulator and hose, a 5-foot shower head, mounting hardware, a garden hose adapter and a manual.
