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Eccotemp SMARTHOME Natural Gas, 6.8 GPM Review

Name: Eccotemp SMARTHOME Natural Gas, 6.8 GPM
Brand: Eccotemp
SKU: B0CG24N5C1

7.1Good · out of 10Rated from the listing's specs, no buyer reviews yet

Written from the listing and 3 buyer reviews, not from our own use · How we rate

We like the Eccotemp SMARTHOME Natural Gas (6.8 GPM) for the mix: up to 6.8 GPM, app control and a 5-year heat exchanger warranty. 3 buyers rate it 2.7/5, and it suits a two-bathroom house with one shower running at a time.

Price$699Price on Sep 30, 2026 · may have changed

Check the price on Amazon ↗Affiliate link · price and stock on Amazon

Compare side by side ↗

Specifications

Brand	Eccotemp
Category	Gas tankless water heaters
Fuel	Natural gas
Stated mounting location	Indoor
Stated maximum flow	6.8 GPM
Stated gas input	140,000 BTU/h
Wi-Fi	Built in, per the listing
Stated warranty	5 years on the heat exchanger
Buyer reviews	3 · 2.7/5
ASIN	B0CG24N5C1

Full listing title: Eccotemp SMARTHOME Indoor 6.8 GPM Natural Gas Tankless Water Heater

Listing evidence

Fuel	Natural Gas Full listing title
Stated mounting location	Indoor Full listing title
Stated maximum flow	6.8 GPM Full listing title
Stated gas input	140,000 BTU Listing text

Updated October 2026

Exact listing, ASIN B0CG24N5C1

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 ↗

Eccotemp SMARTHOME Natural Gas, 6.8 GPM

7.1Good · out of 10$699 Price on Sep 30, 2026 · may have changed

Stated: 6.8 GPM · 140,000 BTU/h
3 buyer reviews
Gas tankless water heaters

This product ↑

Rinnai RE180iN Non-Condensing

7.1Good · out of 10$1,091.16 Price on Sep 30, 2026 · may have changed

Stated: 6.9 GPM
16 buyer reviews
Gas tankless water heaters

See the review ↗

Rheem RTG 7.0 GPM Natural Gas Indoor

7.0Good · out of 10$653.77 Price on Sep 30, 2026 · may have changed

Stated: 7 GPM · 160,000 BTU/h
65 buyer reviews
Gas tankless water heaters

See the review ↗

Up to 6.8 GPM from a 140,000 BTU burner

That's the maximum flow the listing states, and headline flows are usually quoted at a mild temperature rise. A cold January asks for a 63 °F rise (42 °F in, 105 °F out), and at that rise every tankless gives less than its headline; the maker's chart says how much. Counting 2 GPM per shower, as our calculator does, that's two showers and a kitchen tap, less when the water comes in cold.

What it has going for it

What changes in the morning shower rush

Wi-Fi app. Set the temperature, see the flow and get error codes on your phone, which beats reading a blinking code in the crawl space.

5-year warranty. 5 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?

One at a time, plus the kitchen tap: 6.8 GPM covers that on paper.

Two at once: possible where the tap water comes in warm. In a northern January the second shower is the one that runs lukewarm, so read the flow chart at a 63 °F rise first.

Great for you if…

You run one shower and the kitchen tap at once, rarely more
You like to see what your appliances are doing
You want a long warranty: 5 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 3 buyer reviews so far
Star ratings come first for you: 2.7/5 is below the 4.3 average of our ranked picks

What Eccotemp promises

The seller states, word for word, in the Eccotemp SMARTHOME Natural Gas (6.8 GPM) listing:

With a temperature range of 95-140 degrees Fahrenheit and rated for 3-4 applications, this heater provides on-demand hot showers for up to 3 bathrooms simultaneously.
Use the Eccotemp mobile app to track energy consumption, adjust temperatures, set schedules, or even detect product and network errors.
CSA certified for installation in the US and Canada.

Their words and their figures, not our measurements. How steady your shower stays when someone opens the kitchen tap, and what's left of that flow in January, no listing can tell you.

Eccotemp SMARTHOME Natural Gas, 6.8 GPM, view 3

Gas, venting and what's in the box

What the Eccotemp SMARTHOME Natural Gas (6.8 GPM) listing names:

Up to 6.8 GPM
140,000 BTU/h input
Natural gas
Indoor mounting
Wi-Fi app control
CSA, ETL or UL mark named

Warranty & support: 5-year warranty on the heat exchanger, as stated in the listing · CSA, ETL or UL certification named in the listing.

That is the maker's promise, not ours. Keep the invoice, register the Eccotemp SMARTHOME Natural Gas (6.8 GPM) 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.

Eccotemp SMARTHOME Natural Gas, 6.8 GPM, view 4

Price and cost per GPM of stated flow

$699 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 $102.79 (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.

Count the install in the budget: vent pipe, possibly a 3/4" gas line, and a licensed plumber or gas fitter.

The button opens the exact listing (ASIN B0CG24N5C1), where today's price, stock and seller apply.

Eccotemp SMARTHOME Natural Gas, 6.8 GPM, view 5

A better fit for your house?

Two showers and the dishwasher at once? The MIZUDO 199,000 BTU Natural Gas Indoor (9.2/10) states up to 10.3 GPM.

No easy route for a vent pipe? The Rheem RTG 7.0 GPM Natural Gas Outdoor (7.6/10) mounts on an outside wall, per its listing.

On propane, not natural gas? The Marey 170,000 BTU Propane Indoor (7.6/10) runs on propane.

Our take

The verdict

We like the Eccotemp SMARTHOME Natural Gas (6.8 GPM) for up to 6.8 GPM and app control. Only 3 buyers have rated it so far (2.7/5), so treat the score as an early read. Where it falls short: their 2.7/5 average sits under the 4.3 of our ranked picks. We'd pick it if you run one shower and the kitchen tap at once, rarely more; otherwise, put it next to the Novieex 100,000 BTU Propane Indoor first.

Check the price on Amazon ↗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 140,000 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 2.7/5, a mixed record, below our ranked picks' 4.3 average. Only 3 reviews so far, and our formula damps averages built on fewer than 50.

The numbers

Buyer rating: 2.7/5
Reviews: 3
Ranked picks' average: 4.3/5

The one thing we'd check first

Before you order the Eccotemp SMARTHOME Natural Gas (6.8 GPM), check your gas line: 140,000 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

6.8 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

5 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 Eccotemp SMARTHOME Natural Gas (6.8 GPM) stacks up against the closest alternative, the Novieex 100,000 BTU Propane Indoor.

Criterion	Eccotemp SMARTHOME Natural Gas, 6.8 GPM	Novieex 100,000 BTU Propane Indoor
Our rating	7.1/10	7.2/10
Max flow	6.8 GPM	4.3 GPM
Gas input	140,000 BTU/h	100,000 BTU/h
Temperature hold	Not stated	±1 °F stated
Warranty	5 years (heat exchanger)	1 years
Buyer reviews	3 · 2.7/5	None captured

Pick the Novieex 100,000 BTU Propane Indoor if you want our higher-rated option (7.2/10), with a stated ±1 °F hold; stay with the Eccotemp SMARTHOME Natural Gas (6.8 GPM) for more flow (6.8 GPM) and a bigger burner (140,000 BTU/h).

Compare side by side ↗See the Novieex 100,000 BTU Propane Indoor review →

The score in detail

How we rated it

Spec-based rating on a 4.5–8.5 scale: 4.5 + average of the 4 criteria × 0.4. Capped at 8.5 because no customer evidence is included.

Key specifications

8 / 10

Build, warranty & certifications

3 / 10

Listing documentation

7 / 10

Fit & compatibility

8 / 10

This product has no captured buyer-review record yet, so its rating comes from the documented listing alone: four criteria scored out of 10 (key specifications; build, warranty and certifications; listing documentation; fit and compatibility), placed on a 4.5–8.5 scale. Read the full methodology.

Read the methodology →

Frequently asked questions

Is the Eccotemp SMARTHOME Natural Gas (6.8 GPM) any good?

We rate it 7.1/10 (good). The rating comes from its documented listing alone, as no customer-review record is captured yet.

How much hot water can the Eccotemp SMARTHOME Natural Gas, 6.8 GPM deliver?

The listing states a maximum flow of 6.8 GPM and a gas input of 140,000 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 Eccotemp SMARTHOME Natural Gas, 6.8 GPM 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 Eccotemp SMARTHOME Natural Gas (6.8 GPM)?

Its listing states up to 6.8 GPM, Wi-Fi control from your phone and a 5-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 Eccotemp SMARTHOME Natural Gas (6.8 GPM)?

Your winter flow: 6.8 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: 5 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 Eccotemp SMARTHOME Natural Gas (6.8 GPM)?

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 Eccotemp SMARTHOME Natural Gas (6.8 GPM) yourselves?

No, we haven't used it ourselves. Everything on this page comes from its listing and 3 buyer reviews, read line by line and weighed with our published formula.

Gas tankless water heaters ↗All Eccotemp products Comparison tool All product reviews