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Rinnai RE199iN Non-Condensing

Product images: Amazon listings

Rinnai RE199iN Non-Condensing Review

6.5Good · out of 10Not in our top-5 rankings

Written from the listing and 41 buyer reviews, not from our own use · How we rate

The Rinnai RE199iN Non-Condensing ticks most of the boxes we care about: a 9.8 GPM maximum flow, built-in recirculation and a 15-year heat exchanger warranty. It suits a family that showers back to back before school, at 6.5/10 on our rating.

Variants of this model

These are sold as variants of one listing family. Each variant has its own page.

Price$1,280.79Price on Sep 30, 2026 · may have changed
Check the price on Amazon ↗ Rinnai RE199iN Non-Condensing (opens in a new tab)Affiliate link · price and stock on Amazon
Compare side by side ↗
Specifications
BrandRinnai
CategoryGas tankless water heaters
FuelNatural gas
Stated mounting locationIndoor
Stated maximum flow9.8 GPM
Stated gas input199,000 BTU/h
Built-in recirculationStated in the listing
Wi-FiWith an optional module
Stated warranty15 years on the heat exchanger
Buyer reviews41 · 4.6/5
ASINB0B57NW13Y

Full listing title: Rinnai RE199iN Non-Condensing Natural Gas Tankless Water Heater

Listing evidence
FuelNatural Gas Full listing title
Stated mounting locationRE199iN Full listing title (Rinnai model suffix: i = indoor, e = exterior)
Stated maximum flowUp to 9.8 GPM Listing text
Stated gas input199,000 BTU Listing text
Updated October 2026
Exact listing, ASIN B0B57NW13Y
Rating from a published formula

Compared with its closest rivals

Two gas tankless heaters on natural gas too, with about the same flow, closest to it on our rating, each with a dated price.

Compare side by side ↗

Rinnai RE199iN Non-Condensing

Rinnai RE199iN Non-Condensing

6.5Good · out of 10$1,280.79 Price on Sep 30, 2026 · may have changed
  • Stated: 9.8 GPM · 199,000 BTU/h
  • 41 buyer reviews
  • Gas tankless water heaters
This product ↑
Rinnai RX160iN Condensing Smart Sense

Rinnai RX160iN Condensing Smart Sense

6.8Good · out of 10$1,442.70 Price on Sep 30, 2026 · may have changed
  • Stated: 9 GPM
  • 70 buyer reviews
  • Gas tankless water heaters
See the review ↗
Rheem RTGH-95DVLN-3 Natural Gas Indoor

Rheem RTGH-95DVLN-3 Natural Gas Indoor

7.1Good · out of 10$1,454.31 Price on Sep 30, 2026 · may have changed
  • Stated: 9.5 GPM · 199,900 BTU/h · 120 V
  • 62 buyer reviews
  • Gas tankless water heaters
See the review ↗

Up to 9.8 GPM from a 199,000 BTU burner

That's the maximum flow the listing states, and headline flows are usually quoted at a mild temperature rise. With January water coming in at 42 °F and a 105 °F shower, the rise is 63 °F and the real flow is lower; the maker's flow chart has that number. Our calculator counts a shower at 2 GPM, so on paper that's room for three showers at once, fewer when January water comes in cold.

What it has going for it

What changes in the morning shower rush

Built-in recirculation. It can keep hot water moving in the pipes, so the far bathroom gets warm in seconds instead of after a gallon down the drain. Check whether your house has a return line or needs a crossover valve.

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.

One shower at a time, or two?

Two at once: up to 9.8 GPM, and our calculator counts a shower at 2 GPM, so that's two showers and a tap on paper. The maker's flow chart at a 63 °F rise tells you how much of that is left in January.

One at a time: then it's more heater than you need, with the gas line and the vent to match. A smaller unit may do the job for less.

Great for you if…

  • Two showers and the dishwasher run at the same time in your house
  • The far bathroom takes ages to run hot
  • You want a long warranty: 15 years are stated

Skip it if…

  • You want a tight temperature hold: the listing claims no ±1 °F control
  • You want a long review record: only 41 buyer reviews so far
  • You want the high-efficiency kind: the listing doesn't call it condensing

What Rinnai promises

The seller states, word for word, in the Rinnai RE199iN Non-Condensing listing:

  • Compact, space-saving wall-mounted design features an LED display with diagnostic codes and service reminders for easier maintenance and long-term reliability.
  • Designed for indoor installation with proper venting.

The seller's claims, quoted as written; we haven't measured any of it. The flow at your winter rise is in the maker's chart, not in the bullet points.

Rinnai RE199iN Non-Condensing, view 3

Gas, venting and what's in the box

What the Rinnai RE199iN Non-Condensing listing names:

  • Up to 9.8 GPM
  • 199,000 BTU/h input
  • Natural gas
  • Indoor mounting
  • Built-in recirculation
  • Wi-Fi with an add-on module

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 RE199iN 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.

Rinnai RE199iN Non-Condensing, view 4

Price and cost per GPM of stated flow

$1,280.79 Price on Sep 30, 2026 · may have changed

At the price on Sep 30, 2026, each GPM of stated maximum flow works out at about $130.69 (price ÷ stated GPM, our arithmetic). That puts it around the middle of the 45 indoor gas tankless heaters we have a price and a stated flow for.

The heater is often the smaller half of the bill: the venting, a gas line that may need upsizing and a licensed installer's day come on top.

The button opens the exact listing (ASIN B0B57NW13Y), where today's price, stock and seller apply. Sizes and variants of the same family often sit at different prices.

Rinnai RE199iN Non-Condensing, view 5

A better fit for your house?

No easy route for a vent pipe? The A. O. Smith 10 GPM Natural Gas Outdoor (8.0/10) mounts on an outside wall, per its listing.

Want the high-efficiency kind? The Rinnai RU199iN Condensing (7.8/10) is a condensing unit, per its listing.

On propane, not natural gas? The Rheem RTGH 9.5 GPM Propane Indoor (7.8/10) runs on propane.

Our take

The verdict

Our favourite thing about the Rinnai RE199iN Non-Condensing is a 9.8 GPM maximum flow, closely followed by built-in recirculation. Only 41 buyers have rated it so far (4.6/5), so treat the score as an early read. The catch with the Rinnai RE199iN Non-Condensing: no stated temperature hold, while most picks here claim ±1 °F. We'd pick it if two showers and the dishwasher run at the same time in your house; otherwise, put it next to the Noritz NR98SVNG Natural Gas first.

Check the price on Amazon ↗ Rinnai RE199iN Non-Condensing (opens in a new tab)Affiliate link · price and stock on AmazonAll gas tankless water heaters →

Living with it

Install day

Old tank out, unit on the wall, vent through the wall or the roof. Plan the gas line for 199,000 BTU/h; a licensed pro handles it, and often a permit.

The first shower

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.

The first winter

January water comes in colder, so the same unit gives fewer GPM. Stagger the showers if you sized it tight.

Once a year

Flush the heat exchanger with a pump and a descaler (the service valves make it an hour's job), and clean the inlet filter. Our flushing and descaling guide has the checklist.

What buyers say

Buyers give it 4.6/5, an excellent record, well above our ranked picks' 4.3 average. Only 41 reviews so far, and our formula damps averages built on fewer than 50.

The numbers
Buyer rating
4.6/5
Reviews
41
Ranked picks' average
4.3/5

The one thing we'd check first

Before the Rinnai RE199iN Non-Condensing ships, check your gas line: 199,000 BTU/h is a lot of gas at once, so ask your plumber whether the existing line can feed it.

Before you buy

Your winter flow

9.8 GPM is the headline. In a northern January the water comes in near 42 °F, so a 105 °F shower needs a 63 °F rise and the real flow drops. Our flow-rate calculator runs the numbers for your house.

Vent and gas line

Ask the plumber to check the gas line size and the meter against the heater's input, and to quote the vent route at the same visit. Our install cost guide shows what that usually adds.

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.

How it compares

How the Rinnai RE199iN Non-Condensing stacks up against the closest alternative, the Noritz NR98SVNG Natural Gas.

CriterionRinnai RE199iN Non-CondensingNoritz NR98SVNG Natural Gas
Our rating6.5/106.5/10
Max flow9.8 GPM7.5 GPM
Gas input199,000 BTU/hNot stated
Warranty15 years (heat exchanger)Not stated
Buyer reviews41 · 4.6/512 · 4.0/5

Both score 6.5/10. The Rinnai RE199iN Non-Condensing brings more flow (9.8 GPM) and a bigger burner (199,000 BTU/h), so it has the edge on paper.

Compare side by side ↗See the Noritz NR98SVNG Natural Gas review →
The score in detail

How we rated it

Our score: 6.5/10

Buyer rating (45%)

33.9 / 45

4.6/5 average, confidence-damped (41 reviews < 50)

Review volume (35%)

15.4 / 35

41 buyer reviews

Documented specifications (20%)

16.0 / 20

80/100 listing documentation score

Our rating is an evidence index on a 0–10 scale. It is not a buyer star rating, and we have not used the product ourselves.

  • Buyer rating (45%): the captured average shown on this variant's own listing page (not shared with the other Rinnai variants), damped when there are fewer than 50 reviews.
  • Review volume (35%): more reviews mean more reliable evidence, on a logarithmic scale up to 5,000 reviews.
  • Documented specifications (20%): how completely the exact listing documents the attributes that matter.

Our editors then look at how it compares with the other heaters we rate. A commission is never an input to the rating. Read the full methodology.

Read the methodology →

Frequently asked questions

Is the Rinnai RE199iN Non-Condensing any good?

We rate it 6.5/10 (good). It is based on 41 buyer reviews averaging 4.6/5 and the specifications stated in the listing.

How much hot water can the Rinnai RE199iN Non-Condensing deliver?

The listing states a maximum flow of 9.8 GPM and a gas input of 199,000 BTU/h. 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.

Can the Rinnai RE199iN Non-Condensing be installed indoors?

Yes, the listing says indoor mounting. That means a vent route to the outside, combustion air and a gas line sized for the unit, all as the maker and your local code require. A licensed plumber or gas fitter sorts that out.

What do you get with the Rinnai RE199iN Non-Condensing?

Its listing states up to 9.8 GPM, a built-in recirculation pump 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.

What should I check before ordering the Rinnai RE199iN Non-Condensing?

Your winter flow: 9.8 GPM is the headline. In a northern January the water comes in near 42 °F, so a 105 °F shower needs a 63 °F rise and the real flow drops. Our flow-rate calculator runs the numbers for your house. Vent and gas line: ask the plumber to check the gas line size and the meter against the heater's input, and to quote the vent route at the same visit. Our install cost guide shows what that usually adds. 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.

Where can I buy the Rinnai RE199iN Non-Condensing?

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.

Have you used the Rinnai RE199iN Non-Condensing yourselves?

No, we haven't used it ourselves. Everything on this page comes from its listing and 41 buyer reviews, read line by line and weighed with our published formula.

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