Marey GA10LP
The Marey GA10LP (Power Gas 10L) is a small, no-electricity point-of-use propane tankless: about 79,000 BTU/h, up to 3.1 GPM, roughly 87% thermal efficiency, with a copper heat exchanger and a summer/winter control knob for seasonal temperature stability. Despite older listings that call it a "standing pilot" unit, it actually uses two D-cell batteries for ignition and has no electrical connection — which, combined with a low 10 PSI minimum operating pressure, makes it a favorite for cabins, tiny homes, and low-pressure or off-grid setups.
It's a single-fixture heater by design — Marey positions it for households using one hot-water application at a time. At 79,000 BTU it delivers its 3.1 GPM only with warm inlet water, dropping to about 2 GPM in the cold. Because it's a combustion appliance, it must be vented and given adequate combustion air per Marey's instructions — it is not a sealed outdoor camp unit. For a buyer who wants simple, power-free propane hot water for a small load, it's inexpensive and capable, with the usual Marey caveat about customer support.
Key Features
Best Use Cases
Our Verdict
A simple, power-free propane point-of-use heater for cabins, tiny homes, and low-pressure setups — its battery ignition and 10 PSI minimum are the draw. Right for a single fixture, not a household. Vent it properly, size expectations to one tap, and go in aware of Marey's uneven support.
What owners report
Themes summarized from verified-purchase reviews across major retailers (3.7★ average, 234 ratings). These are aggregated owner opinions — not our own bench testing.
Owners value that it runs with no electricity — just batteries and propane — making it easy for cabins and off-grid use.
The ~10 PSI minimum lets it operate where water pressure is limited, a plus for gravity or small-pump systems.
Reviewers are clear it suits one tap at a time; expecting whole-home flow leads to disappointment.
As with Marey generally, some owners report difficulty reaching the company for parts or warranty help.
Marey GA10LP FAQ
Does the GA10LP use a standing pilot?+
No — despite some older listings, it uses two D-cell batteries for ignition and has no standing pilot and no electrical connection. That's part of what makes it suited to off-grid use.
Can it run a whole house?+
No. It's a point-of-use unit for one fixture at a time, delivering up to 3.1 GPM with warm inlet water and about 2 GPM in the cold.
Does it need venting?+
Yes. It's a combustion appliance and must be vented with adequate combustion air per Marey's instructions — it is not a sealed outdoor camp heater.
Will it work with low water pressure?+
Yes — it operates from around 10 PSI, so it suits homes and cabins with modest water pressure.
Price range from leading retailers
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