Marey 24L
The Marey 24L is a budget indoor natural-gas tankless: 170,000 BTU/h, up to 7.5 GPM, a copper heat exchanger, and an LED touchscreen, aimed at whole-home use for a fraction of a mainstream brand's price. Marey rates it for three to four simultaneous use points in warm climates, with CSA certification and a full safety package (overheat, anti-block, flame-failure, and anti-freeze protection). Two practical limits to note up front: it's certified only to 2,000 feet of elevation, and its 5-year warranty covers parts but not labor.
As a non-condensing unit (~0.82 EF) it's inexpensive and needs no condensate drain, but uses more gas per gallon than a condensing heater and requires proper venting. At 7.5 GPM it genuinely can run multiple fixtures in warm and mild climates, dropping toward one to two in the cold. Its roughly 3.8-star rating tells the familiar budget-tankless story — strong value and fast hot water for many owners, offset by a minority reporting reliability issues and Marey's uneven customer support. For a warm-climate home that wants high flow cheaply and can install it properly, it's a lot of capacity per dollar.
Key Features
Best Use Cases
Our Verdict
A high-flow indoor gas tankless at a budget price, best for warm-climate homes that can vent it properly and stay under 2,000 feet. The 7.5 GPM capacity is real; the caveats are non-condensing efficiency, a parts-only warranty, and Marey's spotty support. Buy it for value, not for pedigree — and have a pro install it.
What owners report
Themes summarized from verified-purchase reviews across major retailers (3.8★ average, 142 ratings). These are aggregated owner opinions — not our own bench testing.
Owners cite genuine whole-house hot water and fast delivery at a price well below mainstream gas tankless brands.
Satisfaction hinges on proper venting, gas sizing, and staying under the elevation limit — professional installation pays off.
As across Marey's line, some owners report slow or unresponsive customer service and note the warranty excludes labor.
The ~3.8-star rating reflects a minority reporting fault codes or early issues alongside many satisfied buyers.
Marey 24L FAQ
How many fixtures can the Marey 24L run?+
Up to about 7.5 GPM — three to four fixtures in warm climates, tapering to one or two in cold weather as deliverable flow drops.
Can I install it at altitude?+
It's certified only to 2,000 feet. Above that, performance and safety certification don't apply, so it's not suitable for high-elevation homes.
What does the warranty cover?+
5 years on parts — but not labor. Budget for installation and any service labor separately, and keep your documentation.
Is it condensing?+
No — it's non-condensing at roughly 0.82 EF. No condensate drain, but it needs proper venting and uses more gas per gallon than a condensing unit.
Sources
Price range from leading retailers
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