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WINTEMP WN-36kW Electric, 240V Review

Name: WINTEMP WN-36kW Electric, 240V
Brand: WINTEMP
SKU: B0DGG6S814

8.1Very good · out of 10#2 of 5 in our Whole-House Electric Tankless Heaters ranking

Written from the listing and 203 buyer reviews, not from our own use · How we rate

An 8.7 GPM maximum flow, 36 kW at 240 V and an element that only draws what it needs: the WINTEMP WN-36kW Electric (240V) covers what matters most in an electric tankless heater. It made our top 5 whole-house electric tankless water heaters: a great match for two showers at once where gas is not an option.

Variants of this model

These 203 buyer reviews (4.4/5) are shared by the WN-36kW Electric, 240V and WN-18kW Electric, 240V listings, so they speak for the family more than for one size.

WINTEMP WN-18kW Electric, 240V · WN-18kW · 7.2/10

Price$499.98Price 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	WINTEMP
Category	Electric tankless water heaters
Fuel	Electric
Stated maximum flow	8.7 GPM
Stated heating power	36 kW
Stated voltage	240 V
Breakers named in the listing	1 × 50 A double-pole
Total current	150 A
Wire gauge	2 AWG
Wi-Fi	Built in, per the listing
Stated warranty	2 years
Buyer reviews	203 · 4.4/5, shared by the WINTEMP listing family (2 variants)
ASIN	B0DGG6S814

Full listing title: WINTEMP 36kW Electric Tankless Water Heater 240V ETL Certified WiFi

Listing evidence

Fuel	36kW Full listing title
Stated maximum flow	up to 8.7 GPM Listing text
Stated heating power	36kW Full listing title
Stated voltage	240V Full listing title

Updated October 2026

Exact listing, ASIN B0DGG6S814

Rating from a published formula

Compared with its closest rivals

The two picks next to it in our whole-house electric tankless water heaters ranking, with their rating and a dated price.

Compare side by side ↗

WINTEMP WN-36kW Electric, 240V

8.1Very good · out of 10$499.98 Price on Sep 30, 2026 · may have changed

Stated: 8.7 GPM · 36 kW · 240 V
203 buyer reviews
Electric tankless water heaters

This product ↑

Rheem 18 kW Electric, 240V

9.3Excellent · out of 10$422.92 Price on Sep 30, 2026 · may have changed

Stated: 4.4 GPM · 18 kW · 240 V
2,187 buyer reviews
Electric tankless water heaters

See the review ↗

Stiebel Eltron Tempra 29 Plus

7.9Very good · out of 10$798.99 Price on Sep 30, 2026 · may have changed

Stated: 28.8 kW · 240 V
451 buyer reviews
Electric tankless water heaters

See the review ↗

36 kW at 240 V

The heating power the listing states. At 240 V it draws about 150 A, and the listing asks for 1 × 50 A double-pole breakers on 2 AWG wire. Show that to your electrician first. Whether your panel has the room is the whole question, and the shower comes second.

Why it made our list

What changes in the morning shower rush

8.7 GPM max. That is the headline figure, usually at a modest temperature rise. Our calculator counts a shower at 2 GPM, so think two showers and a kitchen tap on paper, less when the water comes in cold.

Self-modulating. It draws only the power the flow and the setpoint need, instead of slamming every element on. Steadier temperature, and no wasted amps on a summer afternoon.

Warm tap water or a cold January?

Warm tap water: where it comes in around 62 °F (much of the South), 36 kW gives about 5.7 GPM of 105 °F water on our calculator's maths. That's two 2 GPM showers at once.

A cold January: where it comes in at 42 °F, it's about 3.9 GPM, one 2 GPM shower at a time. Up north, that's the figure to size against, and it's why the honest answer is sometimes a second unit or gas.

Great for you if…

You run one shower and the kitchen tap at once, rarely more
Your house has no gas and a 200 A panel with room to spare
You want the shower temperature to stay put

Skip it if…

Your panel is 100 A or already busy: 36 kW at 240 V is about 150 A on its own
You simply want our top pick: that's the Rheem 18 kW Electric (240V) (9.3/10)

What WINTEMP promises

The seller states, word for word, in the WINTEMP WN-36kW Electric (240V) listing:

A 300A household electrical service is recommended for this 36kW tankless water heater.
Advanced self-modulating technology automatically adjusts power based on incoming water temperature and flow rate to deliver consistent hot water while optimizing energy efficiency.

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.

Power, wiring and what's in the box

What the WINTEMP WN-36kW Electric (240V) listing names:

36 kW
240 V
150 A total draw
1 × 50 A double-pole breakers
2 AWG wire
Up to 8.7 GPM
Self-modulating
Wi-Fi app control
CSA, ETL or UL mark named

Warranty & support: 2-year warranty, 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 WINTEMP WN-36kW Electric (240V) if the maker asks, and read the install conditions: many tankless warranties need a licensed install and regular flushing.

Breakers and wire gauge are in the installation manual, and it overrides anything above; your electrician reads it first.

Price and cost per kW

$499.98 Price on Sep 30, 2026 · may have changed

At the price on Sep 30, 2026, each kW of stated heating power works out at about $13.89 (price ÷ stated kW, our arithmetic). That puts it in the cheaper third of the 27 whole-house electric tankless heaters we have a price and a stated power for.

The electrician comes on top: 1 × 50 A double-pole breakers, heavy wire and, in some houses, a panel upgrade.

The button opens the exact listing (ASIN B0DGG6S814), where today's price, stock and seller apply. Sizes and variants of the same family often sit at different prices.

A better fit for your house and panel?

Panel short on spare amps? The Rheem 18 kW Electric, 240V (9.3/10) is rated 18 kW, about 75 A at 240 V.

Only one sink far from the heater? The ThermoMate 14 kW Electric, 240V (7.9/10) is a 14 kW point-of-use unit.

Our take

The verdict

What we'd buy the WINTEMP WN-36kW Electric (240V) for is an 8.7 GPM maximum flow, with 36 kW at 240 V as a bonus. 203 buyers give it 4.4/5, which is a solid sign. Honestly, the catch: the Rheem 18 kW Electric (240V) sitting above it at 9.3/10. We'd pick it if you run one shower and the kitchen tap at once, rarely more; otherwise, put it next to the Rheem 18 kW Electric (240V) first.

Check the price on Amazon ↗Affiliate link · price and stock on AmazonSee the whole-house electric tankless water heaters ranking →

Living with it

Install day

1 new 50 A breakers, 2 AWG wire, the unit on the wall next to the old tank's spot, water in and out. An electrician does the panel side.

The first shower

Hot in a few seconds once the water in the pipes has passed, and the power steps up and down with the flow (self-modulating, per the listing). Set it, then leave it.

The first winter

With 42 °F water coming in, 36 kW gives about 3.9 GPM at 105 °F on our calculator's maths. Low-flow shower heads stretch that further.

Upkeep

Clean the inlet screen and flush out scale on hard water. Our flushing and descaling guide has the routine.

What buyers say

Buyers give it 4.4/5, a strong record, above this ranking's 4.3 average. 203 reviews is a fair sample, enough for the average to mean something. The same reviews appear on both variants of the WINTEMP family, so they describe the family rather than this exact variant.

The numbers

Buyer rating: 4.4/5
Reviews: 203
This ranking's average: 4.3/5

The one thing we'd check first

Before you order the WINTEMP WN-36kW Electric (240V), check your panel: it asks for 1 × 50 A double-pole breakers and 2 AWG wire, so an electrician should look at the panel first.

Before you buy

Your panel

Take a photo of the panel label (main breaker size and free slots) and send it to the electrician with the listing. Our electrical requirements guide explains what they will look for.

Your winter flow

On our calculator's maths, 36 kW gives about 3.9 GPM with 42 °F winter water and 5.7 GPM with 62 °F water. Our flow-rate calculator does it for your region.

The install

Hardwired 240 V work needs a licensed electrician and often a permit. Our install cost guide shows what usually ends up on the quote.

Scale

Hard water still builds up on the elements and the inlet screen. Our flushing and descaling guide covers the routine.

How it compares

How the WINTEMP WN-36kW Electric (240V) stacks up against the closest alternative in our ranking, the Rheem 18 kW Electric (240V).

Criterion	WINTEMP WN-36kW Electric, 240V	Rheem 18 kW Electric, 240V
Our rating	8.1/10	9.3/10
Heating power	36 kW	18 kW
Max flow	8.7 GPM	4.4 GPM
Breakers	1 × 50 A	Not stated
Warranty	2 years	Not stated
Buyer reviews	203 · 4.4/5	2,187 · 4.2/5

Pick the Rheem 18 kW Electric (240V) if you want our higher-rated option (9.3/10); stay with the WINTEMP WN-36kW Electric (240V) for more power (36 kW) and more stated flow (8.7 GPM).

Compare side by side ↗See the Rheem 18 kW Electric, 240V review →

The score in detail

How we rated it

Our score: 8.1/10

Buyer rating (45%)

39.6 / 45

4.4/5 average

Review volume (35%)

21.9 / 35

203 buyer reviews, shared by 2 variants

Documented specifications (20%)

20.0 / 20

100/100 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 WINTEMP 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 WINTEMP WN-36kW Electric (240V) any good?

We rate it 8.1/10 (very good), #2 of 5 in our whole-house electric tankless water heater ranking. It is based on 203 buyer reviews averaging 4.4/5, shared by the WINTEMP listing family (2 variants) and the specifications stated in the listing.

How much hot water can the WINTEMP WN-36kW Electric, 240V deliver?

The listing states a maximum flow of 8.7 GPM and a heating power of 36 kW on 240 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.

What electrical service does the WINTEMP WN-36kW Electric, 240V need?

The listing states 240 V and 36 kW. At 240 V, that is roughly 150 A. A licensed electrician checks the panel, the breakers and the wiring before it goes on the wall.

Are the reviews specific to the WINTEMP WN-36kW Electric (240V)?

No. The same review pool appears on every variant of the WINTEMP listing family: 203 reviews averaging 4.4/5 on the WINTEMP WN-36kW Electric, 240V and WINTEMP WN-18kW Electric, 240V. 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 WINTEMP WN-36kW Electric (240V)?

Its listing states up to 8.7 GPM, 36 kW of heating power, self-modulating power 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 WINTEMP WN-36kW Electric (240V)?

Your panel: take a photo of the panel label (main breaker size and free slots) and send it to the electrician with the listing. Our electrical requirements guide explains what they will look for. Your winter flow: on our calculator's maths, 36 kW gives about 3.9 GPM with 42 °F winter water and 5.7 GPM with 62 °F water. Our flow-rate calculator does it for your region. The install: hardwired 240 V work needs a licensed electrician and often a permit. Our install cost guide shows what usually ends up on the quote. Scale: hard water still builds up on the elements and the inlet screen. Our flushing and descaling guide covers the routine.

Where can I buy the WINTEMP WN-36kW Electric (240V)?

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 WINTEMP WN-36kW Electric (240V) yourselves?

No, we haven't used it ourselves. Everything on this page comes from its listing and 203 buyer reviews, read line by line and weighed with our published formula.

Keep comparing

If the WINTEMP WN-36kW Electric, 240V hasn't sold you yet, see where it ranks, read the guides that feature it or browse all electric tankless water heaters.

Where it ranks

Best Whole-House Electric Tankless Water Heaters in 2026 →

Read this before you buy

Electric tankless water heater requirements: amps, kW and your panel →

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