Home Office & Utility
A portable gas water heater makes endless hot water off a propane tank with two knobs and a battery-sparked igniter · no tank to keep warm, no display to read, no power hookup at all. You set the gas on one knob and the water flow on the other, and the burner fires the moment a tap opens. Our premium pick, the Eccotemp L5, is a 1.5 GPM outdoor heater that runs on a 20 lb LP tank and two D batteries. The budget Camplux AY132 is a featherweight 1.32 GPM unit with the same two-knob, battery-ignition design. Both are screen-free, off-grid, and serviceable with standard parts.
Which one's for you?
A 1.5 GPM liquid-propane outdoor tankless heater that fires automatically on water flow and runs entirely off a 20 lb LP tank plus two D batteries, with no electrical hookup. Output is set by two face-mounted regulator knobs · no screen, no app, no pilot light.
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| Specification | プレミアム選 Eccotemp L5 1.5 GPM Portable Outdoor Tankless Water Heater (Liquid Propane) |
|---|---|
| Gas type | Liquid propane (LP) only · not natural gas[1] |
| Temperature/flow controls | Gas regulator knob and water regulator knob on the face of the heater[1] |
| Display | None · no LCD, LED, or digital readout (knobs only)[1] |
| Flow rate | 1.5 GPM[1] |
| BTU input | 25,000 - 37,500 BTU[1] |
| Ignition | Automatic, powered by 2 D-cell batteries · no pilot light, no mains power[1] |
| Operating water pressure | 20-80 PSI ideal for operation[1] |
| Safety | Built-in tilt switch shuts unit off if tilted more than 45 degrees[1] |
| Installation | Outdoor wall-mount only · not for indoor or confined spaces[1] |
| Owner rating | About 4.2/5 across ~550 Amazon and ~430 Home Depot ratings[3] |
| Temperature range | Adjustable roughly 80-150 F via the two knobs[3] |
| Dimensions | - |
| Max water pressure | - |
| Weight | - |
| Protections | - |
| Certification | - |
| Manual | View manual (PDF) |
Best for
Campers, RVers, off-grid cabins, and outdoor showers that want a dirt-simple propane hot-water source with physical knobs and no electronics.
Skip if
Households needing whole-home flow, indoor permanent installation, or a precise set-and-forget temperature in windy conditions.
Repair parts
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A compact 10 lb, 5-liter propane tankless heater that delivers 1.32 GPM of instant hot water from a 20 lb LP tank with low-pressure startup and battery ignition. Temperature is set with two adjustment knobs and there is no display or app.
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| Specification | バジェット最強 Camplux AY132 5L 1.32 GPM Outdoor Portable Propane Tankless Water Heater, White |
|---|---|
| Gas type | Propane gas · certified for LP only, not other fuels[5] |
| Temperature/flow controls | Gas flow adjustment knob (RED) and water flow adjustment knob (BLUE)[5] |
| Display | None · no LCD, LED, or digital temperature readout (knobs only)[5] |
| Flow rate | 1.32 GPM (5L)[5] |
| BTU input | 28,000 BTU/hr[5] |
| Ignition | Electric pulse, size D battery powered · no electrical connection required, no pilot light[5] |
| Operating water pressure | - |
| Safety | - |
| Installation | - |
| Owner rating | - |
| Temperature range | - |
| Dimensions | 11.42 in x 4.33 in x 14.8 in[5] |
| Max water pressure | 110.0 PSI / 760 kPa[5] |
| Weight | About 10 lb[7] |
| Protections | Auto water cut-off, anti-dry combustion, over-pressure, overheating and flameout protection[5] |
| Certification | CSA approved for outdoor use[7] |
| Manual | View manual (PDF) |
Best for
Budget-minded campers, van-lifers, and off-grid users who want a featherweight knob-controlled propane shower heater.
Skip if
Anyone needing high flow for a family, indoor permanent plumbing, or use in freezing climates.
Repair parts
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| Specification | プレミアム選 Eccotemp L5 1.5 GPM Portable Outdoor Tankless Water Heater (Liquid Propane) | バジェット最強 Camplux AY132 5L 1.32 GPM Outdoor Portable Propane Tankless Water Heater, White |
|---|---|---|
| Gas type | Liquid propane (LP) only · not natural gas[1] | Propane gas · certified for LP only, not other fuels[5] |
| Temperature/flow controls | Gas regulator knob and water regulator knob on the face of the heater[1] | Gas flow adjustment knob (RED) and water flow adjustment knob (BLUE)[5] |
| Display | None · no LCD, LED, or digital readout (knobs only)[1] | None · no LCD, LED, or digital temperature readout (knobs only)[5] |
| Flow rate | 1.5 GPM[1] | 1.32 GPM (5L)[5] |
| BTU input | 25,000 - 37,500 BTU[1] | 28,000 BTU/hr[5] |
| Ignition | Automatic, powered by 2 D-cell batteries · no pilot light, no mains power[1] | Electric pulse, size D battery powered · no electrical connection required, no pilot light[5] |
| Operating water pressure | 20-80 PSI ideal for operation[1] | - |
| Safety | Built-in tilt switch shuts unit off if tilted more than 45 degrees[1] | - |
| Installation | Outdoor wall-mount only · not for indoor or confined spaces[1] | - |
| Owner rating | About 4.2/5 across ~550 Amazon and ~430 Home Depot ratings[3] | - |
| Temperature range | Adjustable roughly 80-150 F via the two knobs[3] | - |
| Dimensions | - | 11.42 in x 4.33 in x 14.8 in[5] |
| Max water pressure | - | 110.0 PSI / 760 kPa[5] |
| Weight | - | About 10 lb[7] |
| Protections | - | Auto water cut-off, anti-dry combustion, over-pressure, overheating and flameout protection[5] |
| Certification | - | CSA approved for outdoor use[7] |
| Manual | View manual (PDF) | View manual (PDF) |
| プレミアム選 Eccotemp L5 1.5 GPM Portable Outdoor Tankless Water Heater (Liquid Propane) | バジェット最強 Camplux AY132 5L 1.32 GPM Outdoor Portable Propane Tankless Water Heater, White | |
|---|---|---|
| Best for | Campers, RVers, off-grid cabins, and outdoor showers that want a dirt-simple propane hot-water source with physical knobs and no electronics. | Budget-minded campers, van-lifers, and off-grid users who want a featherweight knob-controlled propane shower heater. |
| Skip if | Households needing whole-home flow, indoor permanent installation, or a precise set-and-forget temperature in windy conditions. | Anyone needing high flow for a family, indoor permanent plumbing, or use in freezing climates. |
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| Part | プレミアム選 Eccotemp L5 1.5 GPM Portable Outdoor Tankless Water Heater (Liquid Propane) | バジェット最強 Camplux AY132 5L 1.32 GPM Outdoor Portable Propane Tankless Water Heater, White |
|---|---|---|
| Gas-Water Valve Assembly | Eccotemp L5 Complete valve that regulates both gas and water flow; sold direct by Eccotemp (l5-parts). | Camplux AY132 Complete assembly controlling gas flow, ignition and water flow; also sold on Amazon as ASIN B09D7TLZ15. |
| Basic Repair Pack (battery box and ignition pack plus solenoid) | Eccotemp L5 All-in-one ignition/solenoid service kit for restoring firing and water-flow control. | - |
| Gas Solenoid | - | Camplux AY132 Mounts to the gas-water valve assembly; pushes gas to the heat exchanger to complete ignition. |
The Eccotemp L5 makes endless hot water off a propane tank from two face knobs · battery ignition, no power hookup, no display.
Gas knob, water knob, battery spark. One knob sets the gas and one sets the flow; two D batteries fire the burner automatically when a tap opens. There is no pilot light and no mains cord.
1.5 GPM, 25,000 to 37,500 BTU. It averages about 4.2/5 across hundreds of reviews, valued for near-instant hot water off a 20 lb LP tank for camping, cabins, and outdoor showers.
A tilt switch and serviceable valve. The manual notes a tilt switch shuts it off past 45 degrees and treats the gas-water valve and the ignition/solenoid repair pack as the user-replaceable parts.
The Camplux AY132 is a featherweight two-knob propane heater · a red gas knob, a blue water knob, battery ignition, and no display.
Two adjustment knobs, battery ignition. A RED gas-flow knob and a BLUE water-flow knob set the output while D batteries spark the burner; no electrical connection or pilot light is needed.
1.32 GPM, 28,000 BTU, about 10 lb. Owners call it genuinely portable and easy to dial in, ideal for one person or a campsite; it is CSA-approved for outdoor use.
Multiple safety cut-offs, serviceable valve. The manual lists anti-dry, over-pressure, overheating, and flameout protection, and the gas-water valve and solenoid are sold as replacement parts.
Before this pair is published we check each pick · the unit, its controls, its replacement parts, and the manual · against a fixed list. Both picks passed every check below.
Every specification above is numbered to the document it comes from · the product's manual or the manufacturer's own page · so you can verify any claim yourself.