will this supply two showers, washer and dishwasher for two people? (1000 sf house)

Hello- Sizing an electric tankless is very difficult. I always recommend that you call Rheem at 800-432-8373 to get a suggestion. I want to say this will only keep up with ONLY 1 source of hot water at any one given time. That being said, the RTEX-18 performance ( @240V )- 1.5GPM - 82degree rise 2.0GPM - 62degree rise 2.5GPM - 49degree rise 3.0GPM - 41degree rise So.... what it can keep up with all depends on: -the temp of water coming into the house -the flow rate of each faucet/shower head/washing machine/source of hot water -outlet temp desired I hope this helped :) Ben

Paperwork says it requires four 40 amp breakers or two DP 40 amp breakers. Max draw of 75 amps.

Rheem rtex-18 be big enough to heat water in my shop to wash my hands and perhaps take a shower in kansas city, mo?

Yes you could even go with the unit rtex-15 one smaller if that's it. Good luck

how many breakers and what amp.

The RTEX-18 (240 Volt) requires (2) 40 amp breakers and 8 AWG wire.

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Rheem (リーム) RTEX-18 18kW 240V 電気タンクレス湯沸かし器小型グレー

Rheem (リーム) RTEX-18 18kW 240V 電気タンクレス湯沸かし器小型グレー

Product ID: 724817007

Details

ブランド
Rheem
商品の寸法
36.8幅 x 46.4高さ
容量
18 gallons
特徴
LEDディスプレイ
電源
AC電源。

⚡18kW high power output

💧Max flow 4.4 GPM

📟±1°C precision digital temp control

R32112

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Description

🔥 Power up your home with endless hot water, minus the bulk!

COMPACT SPACE SAVER - 90% smaller than traditional tanks, fits seamlessly under sinks or tight spots
CONTINUOUS HOT WATER FLOW - Tankless design delivers endless hot water on demand—never run out again
ENERGY SMART SELF MODULATION - Adjusts power dynamically to save up to 50% on heating costs
PRECISION TEMPERATURE CONTROL - LED display with ±1°C accuracy for perfect comfort every time
EASY INSTALLATION MAINTENANCE - Screw-in design with 3/4 inch NPT water connections for hassle-free setup

The Rheem RTEX-18 is a high-efficiency 18kW tankless electric water heater designed for whole-home use. Featuring precise digital temperature control, advanced self-modulation technology, and a compact footprint 90% smaller than traditional tanks, it delivers continuous hot water at up to 4.4 gallons per minute while saving energy and space. Easy to install and maintain, this sleek gray unit is perfect for modern homes seeking smart, reliable water heating.

Specifications

ASIN	B01MR7Z39V
GTIN (Global Trade Identification Number)	00020352685335
UPC	020352685335
おすすめ度	4.3 5つ星のうち4.3 (28) var
その他特徴	LEDディスプレイ
アイテムの深さ	18.25 inches
カラー	グレー
スタイル名	Whole Home 18kw
ブランド名	Rheem
メーカー名	Rheem
メーカー型番	RTEX-18
ユニット数	1.0 個
レンズマウントの種類	ウォール
ワット量	18000 W
付属コンポーネント	継手、エアレーター。
品番・型番	RTEX-18
品目の寸法（W x H）	36.8幅 x 46.4高さ cm
商品の入り数	1
商品の重量	14.78 ポンド
容量	18 gallons
待機電力の遮断	99.8%
最大動作圧力	150 ポンド/平方インチ
最大流動率	4.4 ガロン/分
最大温度	140 華氏
熱出力	18 キロワット
素材	鉄
電圧	240 ボルト
電気	はい
電源	AC電源。

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R32112

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Africa.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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Perfect platform for hard-to-find items. Delivery was prompt.

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Rheem (リーム) RTEX-18 18kW 240V 電気 タンクレス 湯沸かし器 小型 グレー

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Details

Description

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Common Questions

Rheem (リーム) RTEX-18 18kW 240V 電気タンクレス湯沸かし器小型グレー