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Westinghouse 180,000 BTU Propane Outdoor Review

Name: Westinghouse 180,000 BTU Propane Outdoor
Brand: Westinghouse
SKU: B0F66MFQ8H

5.5Fair · out of 10#4 of 5 in our Outdoor Propane Tankless Water Heaters ranking

Written from the listing and 34 buyer reviews, not from our own use · How we rate

We like the Westinghouse 180,000 BTU Propane Outdoor for the mix: an 8.1 GPM maximum flow, outdoor mounting that skips the flue and a ±1 °F temperature hold. It earned a spot in our top 5 outdoor propane tankless water heaters, and it's built for one shower plus the kitchen in a typical family morning.

Variants of this model

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

Westinghouse Natural Gas Outdoor · 8.1GPM|Natural Gas|Out · 7.5/10

Price$799.98Price 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	Westinghouse
Category	Gas tankless water heaters
Fuel	Propane
Stated mounting location	Outdoor
Stated maximum flow	8.1 GPM
Stated gas input	180,000 BTU/h
Stated voltage	120 V
Temperature range	95 to 158 °F
Temperature hold	±1 °F, per the listing
Freeze protection	Stated in the listing
Stated warranty	5 years on the heat exchanger
Buyer reviews	34 · 4.3/5
ASIN	B0F66MFQ8H

Full listing title: Westinghouse Tankless Water Heater Propane Outdoor, 8.1 GPM, 180,000 BTU

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	180,000 BTU Full listing title
Stated voltage	120V Listing text

Updated October 2026

Exact listing, ASIN B0F66MFQ8H

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 ↗

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

This product ↑

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

See the review ↗

Novieex 120,000 BTU Propane Outdoor

4.1Fair · out of 10$499.99 Price on Sep 30, 2026 · may have changed

Stated: 5.3 GPM · 120,000 BTU/h · 110 V
20 buyer reviews
Gas tankless water heaters

See the review ↗

Up to 8.1 GPM from a 180,000 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 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

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.

±1 °F hold. The burner adjusts as the flow changes, so the shower stays where you set it when somebody opens the kitchen tap. On paper, at least: that is the seller's claim.

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: the listing states freeze protection. It only works while the unit has power, so an outage on a frozen night is the risk to plan for; drain it if the power stays off.

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
You want a long review record: only 34 buyer reviews so far
You simply want our top pick: that's the FOGATTI Outdoor Propane Tankless (9.1/10)

What Westinghouse promises

The seller states, word for word, in the Westinghouse 180,000 BTU Propane Outdoor listing:

Comes standard with a wired digital controller for convenient temperature adjustment from multiple points around the house, with an adjustable range of 95°F–158°F for precise on-demand heating.
Compatible with standard 3/4" NPT residential plumbing systems.

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.

Westinghouse 180,000 BTU Propane Outdoor, view 3

Gas, mounting and what's in the box

What the Westinghouse 180,000 BTU Propane Outdoor listing names:

Up to 8.1 GPM
180,000 BTU/h input
Propane
Outdoor mounting
±1 °F temperature hold claimed
95 to 158 °F setpoint
Freeze protection named
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 Westinghouse 180,000 BTU Propane Outdoor if the maker asks, and read the install conditions: many tankless warranties need a licensed install and regular flushing.

The installation manual has the last word on venting, gas line and clearances; your installer reads it before you order.

Westinghouse 180,000 BTU Propane Outdoor, view 4

Price and cost per GPM of stated flow

$799.98 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 $98.76 (price ÷ stated GPM, our arithmetic). That puts it around the middle 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 B0F66MFQ8H), where today's price, stock and seller apply. Sizes and variants of the same family often sit at different prices.

Westinghouse 180,000 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.

Want the high-efficiency kind? The Takagi T-H3S-OS-P Condensing Propane (6.4/10) is a condensing unit, per its listing.

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

Our take

The verdict

Our favourite thing about the Westinghouse 180,000 BTU Propane Outdoor is an 8.1 GPM maximum flow, closely followed by outdoor mounting that skips the flue. Only 34 buyers have rated it so far (4.3/5), so treat the score as an early read. The one thing that bugs us: the FOGATTI Outdoor Propane Tankless sitting above it at 9.1/10. We'd pick this Westinghouse outdoor tankless heater if you run one shower and the kitchen tap at once, rarely more; otherwise, put it next to the APUS 190,000 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 180,000 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 4.3/5, a solid record, right on this ranking's 4.3 average. Only 34 reviews so far, and our formula damps averages built on fewer than 50.

The numbers

Buyer rating: 4.3/5
Reviews: 34
This ranking's average: 4.3/5

The one thing we'd check first

Before you order the Westinghouse 180,000 BTU Propane Outdoor, check your gas line: 180,000 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

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 Westinghouse 180,000 BTU Propane Outdoor stacks up against the closest alternative in our ranking, the APUS 190,000 BTU Propane Outdoor.

Criterion	Westinghouse 180,000 BTU Propane Outdoor	APUS 190,000 BTU Propane Outdoor
Our rating	5.5/10	6.9/10
Gas input	180,000 BTU/h	190,000 BTU/h
Efficiency	Not stated	0.81 UEF
Warranty	5 years (heat exchanger)	2 years
Buyer reviews	34 · 4.3/5	102 · 4.0/5

Pick the APUS 190,000 BTU Propane Outdoor if you want our higher-rated option (6.9/10), with a bigger burner (190,000 BTU/h) and a stated 0.81 UEF; stay with the Westinghouse 180,000 BTU Propane Outdoor for a longer stated warranty (5 years) and a higher buyer rating (4.3/5).

Compare side by side ↗See the APUS 190,000 BTU Propane Outdoor review →

The score in detail

How we rated it

Our score: 5.5/10

Buyer rating (45%)

26.3 / 45

4.3/5 average, confidence-damped (34 reviews < 50)

Review volume (35%)

14.6 / 35

34 buyer reviews

Documented specifications (20%)

14.0 / 20

70/100 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 Westinghouse 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 Westinghouse 180,000 BTU Propane Outdoor any good?

We rate it 5.5/10 (fair), #4 of 5 in our outdoor propane tankless water heater ranking. It is based on 34 buyer reviews averaging 4.3/5 and the specifications stated in the listing.

How much hot water can the Westinghouse 180,000 BTU Propane Outdoor deliver?

The listing states a maximum flow of 8.1 GPM and a gas input of 180,000 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 Westinghouse 180,000 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.

What do you get with the Westinghouse 180,000 BTU Propane Outdoor?

Its listing states up to 8.1 GPM, outdoor mounting that skips the flue, temperature held within ±1 °F 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 Westinghouse 180,000 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: 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 Westinghouse 180,000 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 Westinghouse 180,000 BTU Propane Outdoor yourselves?

No, we haven't used it ourselves. Everything on this page comes from its listing and 34 buyer reviews, read line by line and weighed with our published formula.

Keep comparing

If the Westinghouse 180,000 BTU Propane Outdoor hasn't sold you yet, see where it ranks or browse all gas tankless water heaters.

Where it ranks

Best Outdoor Propane Tankless Water Heaters in 2026 →

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