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Written from the listing's specs, not from our own use · How we rate
We like the Rinnai RE199eN Non-Condensing for the mix: a 7.6 GPM maximum flow, outdoor mounting that skips the flue and a 15-year heat exchanger warranty. It makes most sense for replacing a 40-gallon tank in a mid-size home; we rate it 7.1/10 from its listing.
These are sold as variants of one listing family. Each variant has its own page.
| Brand | Rinnai |
|---|---|
| Category | Gas tankless water heaters |
| Fuel | Natural gas |
| Stated mounting location | Outdoor |
| Stated maximum flow | 7.6 GPM |
| Wi-Fi | With an optional module |
| Stated warranty | 15 years on the heat exchanger |
| ASIN | B0B57MVT4S |
Full listing title: Rinnai RE199eN Non-Condensing Natural Gas Tankless Water Heater
| Fuel | Natural GasFull listing title |
|---|---|
| Stated mounting location | RE199eNFull listing title (Rinnai model suffix: i = indoor, e = exterior) |
| Stated maximum flow | up to 7.6 GPMListing text |
Rated from the listing's specs, no buyer reviews yet
What it's made for: replacing a 40-gallon tank in a mid-size home.
Two gas tankless heaters on natural gas too, with about the same flow, closest to it on our rating, each with a dated price.
That's the maximum flow the listing states, and headline flows are usually quoted at a mild temperature rise. Up north in winter, 42 °F water has to climb 63 °F to reach a 105 °F shower, and the flow drops with it. Ask for the flow chart and read that line. Our calculator counts a shower at 2 GPM, so on paper that's two showers and a kitchen tap, less when the water comes in cold.
What it has going for it
Mounts outside. No vent pipe through the roof or the rim joist: it hangs on an outside wall and breathes on its own. In a cold climate, ask what keeps it from freezing.
15-year warranty. 15 years on the heat exchanger, per the listing. Read what it needs from you: many makers ask for a licensed install and regular flushing to keep it valid.
Mild winters: the Rinnai RE199eN Non-Condensing goes on an outside wall, which saves the vent pipe and keeps the closet free.
Hard freezes: the listing names no freeze protection, so ask the seller what keeps it from bursting before it goes on a north wall.
What the Rinnai RE199eN Non-Condensing listing names:
Warranty & support: 15-year warranty on the heat exchanger, as stated in the listing.
That is the maker's promise, not ours. Keep the invoice, register the Rinnai RE199eN Non-Condensing if the maker asks, and read the install conditions: many tankless warranties need a licensed install and regular flushing.
Read the installation manual for the vent, the gas line size and the clearances before you order; it overrides anything above.
At the price on Sep 30, 2026, each GPM of stated maximum flow works out at about $168.53 (price ÷ stated GPM, our arithmetic). That puts it in the pricier third of the 32 outdoor tankless heaters we have a price and a stated flow for.
Outside mounting saves the vent pipe; the gas line, the water lines and a weatherproof outlet are still a separate bill.
The button opens the exact listing (ASIN B0B57MVT4S), where today's price, stock and seller apply. Sizes and variants of the same family often sit at different prices.
Two showers and the dishwasher at once? The A. O. Smith 10 GPM Natural Gas Outdoor (8.0/10) states up to 10 GPM.
Hard freezes where you live? The Ranein 190,000 BTU Natural Gas Indoor (7.9/10) is an indoor unit, out of the frost.
Want the high-efficiency kind? The Rheem RTGH 8.4 GPM Natural Gas Indoor (7.3/10) is a condensing unit, per its listing.
Our take
What we'd buy the Rinnai RE199eN Non-Condensing for is a 7.6 GPM maximum flow, with outdoor mounting that skips the flue as a bonus. No buyer reviews yet, so this Rinnai outdoor tankless heater has to win you over on paper. The catch with the Rinnai: no stated temperature hold, while most picks here claim ±1 °F. We'd pick it if you run one shower and the kitchen tap at once, rarely more; otherwise, put it next to the LiberLive 130,000 BTU NG Outdoor in Gray first.
It goes on an outside wall, with gas, water and power run to it. a licensed pro handles it, and often a permit.
Hot water arrives after the cold already in the pipes, then stays. A trickle from a bathroom tap may not light the burner; open it a bit more.
January water comes in colder, so the same unit gives fewer GPM. Stagger the showers if you sized it tight.
Flush the heat exchanger with a pump and a descaler (the service valves make it an hour's job), and clear leaves and wasp nests from the cabinet vents. Our flushing and descaling guide has the checklist.
Before the Rinnai RE199eN Non-Condensing ships, check your winter flow: 7.6 GPM is a best case, so run your January numbers in our calculator first.
Count the fixtures that run together on a busy morning (our calculator uses 2 GPM a shower, 1.5 for the kitchen), then compare with the maker's chart. Our sizing guide shows how.
Pick a wall away from windows and doors, with power for the controls. Our indoor vs outdoor guide compares the two installs.
15 years are stated on the heat exchanger. Read what it requires: a licensed install, the gas type and regular flushing are the usual conditions.
Hard water scales the heat exchanger. Service valves on the water lines turn the yearly flush into an hour with a bucket and a pump; our flushing and descaling guide shows the routine.
How the Rinnai RE199eN Non-Condensing stacks up against the closest alternative, the LiberLive 130,000 BTU NG Outdoor in Gray.
| Criterion | Rinnai RE199eN Non-Condensing | LiberLive 130,000 BTU NG Outdoor, Gray |
|---|---|---|
| Our rating | 7.1/10 | 7.3/10 |
| Max flow | 7.6 GPM | 5.3 GPM |
| Gas input | Not stated | 130,000 BTU/h |
| Warranty | 15 years (heat exchanger) | 2 years |
Pick the LiberLive 130,000 BTU NG Outdoor in Gray if you want our higher-rated option (7.3/10), with a bigger burner (130,000 BTU/h); stay with the Rinnai RE199eN Non-Condensing for more flow (7.6 GPM) and a longer stated warranty (15 years).
We rate it 7.1/10 (good). The rating comes from its documented listing alone, as no customer-review record is captured yet.
The listing states a maximum flow of 7.6 GPM. The headline flow is a mild-weather number: with cold winter water coming in, the same unit gives you less. Read the maker's flow chart at your winter rise, or let our flow-rate calculator do the sums.
The listing says outdoor mounting. It only goes inside if the maker lists that exact model for indoor use, with the venting it specifies; a licensed gas installer confirms the spot under your local code.
Its listing states up to 7.6 GPM, outdoor mounting that skips the flue and a 15-year heat exchanger warranty. These are the seller's figures, not our measurements: how steady the temperature is in your shower and how it copes with your winter water can't be read from a listing.
Your winter flow: count the fixtures that run together on a busy morning (our calculator uses 2 GPM a shower, 1.5 for the kitchen), then compare with the maker's chart. Our sizing guide shows how. The outside wall: pick a wall away from windows and doors, with power for the controls. Our indoor vs outdoor guide compares the two installs. The warranty terms: 15 years are stated on the heat exchanger. Read what it requires: a licensed install, the gas type and regular flushing are the usual conditions. Flushing: hard water scales the heat exchanger. Service valves on the water lines turn the yearly flush into an hour with a bucket and a pump; our flushing and descaling guide shows the routine.
We link to the exact listing on Amazon, where today's price, stock and seller apply. It is an affiliate link, and it has no effect on the rating.
No, we haven't used it ourselves. Everything on this page comes from its listing, read line by line and weighed with our published formula.