Product images: Amazon listings

APUS 190,000 BTU Propane Outdoor Review

Name: APUS 190,000 BTU Propane Outdoor
Brand: APUS
SKU: B0FHH9RW9J

6.9Good · out of 10#3 of 5 in our Outdoor Propane Tankless Water Heaters ranking

Written from the listing and 102 buyer reviews, not from our own use · How we rate

We like the APUS 190,000 BTU Propane Outdoor for the mix: up to 8.1 GPM, a 0.81 UEF rating and an outside-wall install with no vent run. A strong pick for replacing a 40-gallon tank in a mid-size home, and one of our top 5 outdoor propane tankless water heaters.

Variants of this model

These 102 buyer reviews (4.0/5) are shared by the 190,000 BTU Propane Outdoor and 140,000 BTU Natural Gas Indoor listings, so they speak for the family more than for one size.

APUS 140,000 BTU Natural Gas Indoor · 140000BTU, 6.8GPM, Natural Gas · 6.7/10

Price$629.99Price 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	APUS
Category	Gas tankless water heaters
Fuel	Propane
Stated mounting location	Outdoor
Stated maximum flow	8.1 GPM
Stated gas input	190,000 BTU/h
Stated voltage	120 V
Stated efficiency	0.81 UEF
Temperature range	95 to 149 °F
Temperature hold	±1 °F, per the listing
Freeze protection	Stated in the listing
Wi-Fi	Built in, per the listing
Stated warranty	2 years
Buyer reviews	102 · 4.0/5, shared by the APUS listing family (2 variants)
ASIN	B0FHH9RW9J

Full listing title: APUS Propane Tankless Water Heater, 190,000 BTU, 8.1 GPM, Outdoor

Listing evidence

Fuel	Propane Full listing title
Stated mounting location	Outdoor Full listing title
Stated maximum flow	8.1 GPM Full listing title
Stated gas input	190,000 BTU Full listing title
Stated voltage	120V Listing text

Updated October 2026

Exact listing, ASIN B0FHH9RW9J

Rating from a published formula

Compared with its closest rivals

The two picks next to it in our outdoor propane tankless water heaters ranking, with their rating and a dated price.

Compare side by side ↗

APUS 190,000 BTU Propane Outdoor

6.9Good · out of 10$629.99 Price on Sep 30, 2026 · may have changed

Stated: 8.1 GPM · 190,000 BTU/h · 120 V
102 buyer reviews
Gas tankless water heaters

This product ↑

Ranein 130,000 BTU Propane Outdoor

7.5Very good · out of 10$579 Price on Sep 30, 2026 · may have changed

Stated: 5.3 GPM · 130,000 BTU/h
710 buyer reviews
Gas tankless water heaters

See the review ↗

Westinghouse 180,000 BTU Propane Outdoor

5.5Fair · out of 10$799.98 Price on Sep 30, 2026 · may have changed

Stated: 8.1 GPM · 180,000 BTU/h · 120 V
34 buyer reviews
Gas tankless water heaters

See the review ↗

Up to 8.1 GPM from a 190,000 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.

Why it made our list

What changes in the morning shower rush

0.81 UEF. Uniform Energy Factor is the federal efficiency label: the higher it is, the less gas or power goes up the vent instead of into your shower.

Mounts outside. No vent pipe through the roof or the rim joist: it hangs on an outside wall and breathes on its own. The listing states freeze protection, which typically needs power at the wall to work.

Mild winters or hard freezes?

Mild winters: hang it outside and you skip the vent run through the rim joist and the combustion-air questions indoors.

Hard freezes: freeze protection is stated, and it runs on electricity. A long outage in January is when you drain it, before the heat exchanger splits.

Great for you if…

You run one shower and the kitchen tap at once, rarely more
There is no good vent route inside your house
A shower that suddenly runs cold drives you mad

Skip it if…

Your winters freeze hard and the outside wall has no power for freeze protection
Star ratings come first for you: 4.0/5 is below the 4.3 average of this ranking
You simply want our top pick: that's the FOGATTI Outdoor Propane Tankless (9.1/10)

What APUS promises

The seller states, word for word, in the APUS 190,000 BTU Propane Outdoor listing:

Remotely adjust your tankless water heater via App (Works with Tuya APP) or wired controller (95°F–149°F).
It connects directly to a 120V AC power source for straightforward setup, and features standard 3/4" water and gas connections for smooth integration with most home systems.

That's the seller talking, not us. No listing tells you how it copes with 42 °F water at 6:45 in the morning.

APUS 190,000 BTU Propane Outdoor, view 3

Gas, mounting and what's in the box

What the APUS 190,000 BTU Propane Outdoor listing names:

Up to 8.1 GPM
190,000 BTU/h input
Propane
Outdoor mounting
0.81 UEF
±1 °F temperature hold claimed
95 to 149 °F setpoint
Freeze protection named
Wi-Fi app control

Warranty & support: 2-year warranty, as stated in the listing.

That is the maker's promise, not ours. Keep the invoice, register the APUS 190,000 BTU Propane Outdoor 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.

APUS 190,000 BTU Propane Outdoor, view 4

Price and cost per GPM of stated flow

$629.99 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 $77.78 (price ÷ stated GPM, our arithmetic). That puts it in the cheaper third of the 32 outdoor tankless heaters we have a price and a stated flow for.

No vent run to pay for, but the gas line, the water lines to the outside wall and an outlet for the freeze protection still come on top.

The button opens the exact listing (ASIN B0FHH9RW9J), where today's price, stock and seller apply. Sizes and variants of the same family often sit at different prices.

APUS 190,000 BTU Propane Outdoor, view 5

A better fit for your house?

Hard freezes where you live? The Rheem RTGH 9.5 GPM Propane Indoor (7.8/10) is an indoor unit, out of the frost.

On natural gas, not propane? The Rheem RTG 8.4 GPM Natural Gas Outdoor (7.7/10) runs on natural gas.

Only one bathroom? The Ranein 130,000 BTU Propane Outdoor (7.5/10) states up to 5.3 GPM.

Our take

The verdict

We like the APUS 190,000 BTU Propane Outdoor for up to 8.1 GPM and a 0.81 UEF rating. 102 buyers have had their say, which is plenty to go on. Where it falls short: their 4.0/5 average sits under the 4.3 of this ranking. We'd pick it if you run one shower and the kitchen tap at once, rarely more; otherwise, put it next to the Ranein 130,000 BTU Propane Outdoor first.

Check the price on Amazon ↗Affiliate link · price and stock on AmazonSee the outdoor propane tankless water heaters ranking →

Living with it

Install day

It goes on an outside wall, with gas, water and power run to it. Plan the gas line for 190,000 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 (within ±1 °F, per the listing). 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 clear leaves and wasp nests from the cabinet vents. Our flushing and descaling guide has the checklist.

What buyers say

Buyers give it 4.0/5, a decent record, below this ranking's 4.3 average. 102 reviews is a fair sample, enough for the average to mean something. The same reviews appear on both variants of the APUS family, so they describe the family rather than this exact variant.

The numbers

Buyer rating: 4.0/5
Reviews: 102
This ranking's average: 4.3/5

The one thing we'd check first

Before the APUS 190,000 BTU Propane Outdoor ships, check your gas line: 190,000 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

8.1 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.

The outside wall

Pick a wall away from windows and doors, with power for the controls and the freeze protection the listing mentions. Our indoor vs outdoor guide compares the two installs.

The warranty terms

2 years are stated. 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 APUS 190,000 BTU Propane Outdoor stacks up against the closest alternative in our ranking, the Ranein 130,000 BTU Propane Outdoor.

Criterion	APUS 190,000 BTU Propane Outdoor	Ranein 130,000 BTU Propane Outdoor
Our rating	6.9/10	7.5/10
Max flow	8.1 GPM	5.3 GPM
Gas input	190,000 BTU/h	130,000 BTU/h
Efficiency	0.81 UEF	Not stated
Temperature hold	±1 °F stated	Not stated
Buyer reviews	102 · 4.0/5	710 · 4.2/5

Pick the Ranein 130,000 BTU Propane Outdoor if you want our higher-rated option (7.5/10), with a higher buyer rating (4.2/5); stay with the APUS 190,000 BTU Propane Outdoor for more flow (8.1 GPM) and a bigger burner (190,000 BTU/h).

Compare side by side ↗See the Ranein 130,000 BTU Propane Outdoor review →

The score in detail

How we rated it

Our score: 6.9/10

Buyer rating (45%)

36.0 / 45

4.0/5 average

Review volume (35%)

19.0 / 35

102 buyer reviews, shared by 2 variants

Documented specifications (20%)

14.4 / 20

72/100 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 of the review pool shown on both variants of the APUS listing family, 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 APUS 190,000 BTU Propane Outdoor any good?

We rate it 6.9/10 (good), #3 of 5 in our outdoor propane tankless water heater ranking. It is based on 102 buyer reviews averaging 4.0/5, shared by the APUS listing family (2 variants) and the specifications stated in the listing.

How much hot water can the APUS 190,000 BTU Propane Outdoor deliver?

The listing states a maximum flow of 8.1 GPM and a gas input of 190,000 BTU/h on 120 V. 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 APUS 190,000 BTU Propane Outdoor be installed indoors?

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.

Are the reviews specific to the APUS 190,000 BTU Propane Outdoor?

No. The same review pool appears on every variant of the APUS listing family: 102 reviews averaging 4.0/5 on the APUS 190,000 BTU Propane Outdoor and APUS 140,000 BTU Natural Gas Indoor. The count therefore describes the family, not this exact variant, and in our rankings the family takes a single slot.

What do you get with the APUS 190,000 BTU Propane Outdoor?

Its listing states up to 8.1 GPM, a 0.81 UEF rating, outdoor mounting that skips the flue, temperature held within ±1 °F and Wi-Fi control from your phone. 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 APUS 190,000 BTU Propane Outdoor?

Your winter flow: 8.1 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. The outside wall: pick a wall away from windows and doors, with power for the controls and the freeze protection the listing mentions. Our indoor vs outdoor guide compares the two installs. The warranty terms: 2 years are stated. 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 APUS 190,000 BTU Propane Outdoor?

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 APUS 190,000 BTU Propane Outdoor yourselves?

No, we haven't used it ourselves. Everything on this page comes from its listing and 102 buyer reviews, read line by line and weighed with our published formula.

Keep comparing

If the APUS 190,000 BTU Propane Outdoor hasn't sold you yet, see where it ranks, read the guides that feature it or browse all gas tankless water heaters.

Where it ranks

Best Outdoor Propane Tankless Water Heaters in 2026 →

Read this before you buy

Indoor vs outdoor tankless water heater: which one fits your house? →

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