Eccotemp 45HI
The Eccotemp 45HI is the higher-capacity unit in Eccotemp's indoor line: a non-condensing propane tankless with a modulating 19,000–150,000 BTU/h burner and up to 6.8 GPM, aimed at whole-home use at a budget price. Its useful trick is 0.7 GPM low-flow ignition — it fires on small draws where cheaper units won't — and it adds a digital display, anti-freeze protection, and CSA approval. Note it needs a 120V outlet to run its exhaust fan and controls, and it's certified for use up to 2,000 feet elevation.
At 6.8 GPM it can supply two to three fixtures in warm climates, tapering to one or two in the cold. Being non-condensing (~0.80 UEF), it costs less up front and skips the condensate drain, but uses more gas per gallon than a condensing unit and needs proper venting. Its roughly 3.8-star owner rating reflects a familiar budget-tankless pattern: strong value and fast hot water when everything's dialed in, with a minority reporting setup fussiness or reliability issues. Backed by a solid 10-year heat-exchanger warranty, it's a reasonable value pick for a whole small home.
Key Features
Best Use Cases
Our Verdict
A budget whole-home indoor propane unit with genuinely useful low-flow ignition and a strong 10-year heat-exchanger warranty. Good value for a small-to-mid home in warm/mild climates that can supply a 120V outlet and proper venting. Temper expectations on reliability given the mixed owner rating, and remember the 2,000-foot elevation limit.
What owners report
Themes summarized from verified-purchase reviews across major retailers (3.8★ average, 89 ratings). These are aggregated owner opinions — not our own bench testing.
Owners repeatedly note near-instant hot water at the tap and endless supply once installed, a big upgrade from an old tank.
The whole-home capacity and 10-year exchanger warranty at a low price are common reasons buyers choose it.
The ~3.8-star rating reflects a minority reporting installation quirks or reliability issues — professional install and proper venting help.
The 0.7 GPM ignition is praised for firing on small draws where cheaper units won't.
Eccotemp 45HI FAQ
Does the 45HI need electricity?+
Yes — a 120V outlet powers the exhaust fan, digital display, and control board. It's indoor and non-condensing, so it also needs proper venting (no condensate drain required).
How many fixtures can it run?+
Up to about 6.8 GPM — two to three fixtures in warm climates, tapering to one or two in cold weather as deliverable flow drops.
Can I install it at high altitude?+
It's certified to 2,000 feet. Above that, performance and efficiency can suffer, so it's not the right choice for high-elevation homes.
What's the warranty?+
10 years on the heat exchanger and 5 years on parts — notably strong for a budget unit. Register and install per instructions to keep it valid.
Sources
Price range from leading retailers
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