MRCOOL HeatWise™ 4500 Watt Tall Electric Tank Water Heater - 40 Gallon Capacity

MRCOOL

MRCOOL HeatWise™ 4500 Watt Tall Electric Tank Water Heater - 40 Gallon Capacity

Model: MTWH04540ET SKU: MTWH04540ET

208/240V

$748.00 Free Shipping
In Stock
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At a Glance

Key Specifications

System Type Water Heater
Voltage 208/240V · Single Phase
Overview

Product Overview

The MRCOOL® HeatWise™ Tall 40-Gallon Electric Tank Water Heater is a dependable solution for delivering consistent hot water throughout your home. Engineered for durability and energy savings, this unit helps lower utility costs while providing reliable performance—making it a smart and eco-friendly choice for today’s households.

With high-efficiency heating elements, the system heats water quickly to your desired temperature, minimizing wait times. Its dual stainless steel construction combined with a ceramic-coated heating element delivers up to 50% greater corrosion resistance, promoting a longer-lasting, low-maintenance system. Additional built-in features—such as an anti-bacterial tank and a patented Rare Earth Anode rod—help ensure peak efficiency and long-term reliability.

Designed with a tall, slim profile, this water heater easily fits into narrow spaces like closets or utility rooms, making it a flexible option for homes with limited installation space. User-friendly temperature controls allow for easy adjustments, while its ultra-quiet operation keeps noise to a minimum. Integrated safety features offer protection from overheating, dry firing, and pressure buildup, giving you added confidence and comfort.

Backed by a 10-year parts warranty, 10-year tank warranty, and a 1-year limited labor warranty, the MRCOOL® Electric Tank Water Heater delivers peace of mind, efficiency, and long-lasting hot water performance for years to come.

Additional specifications

UPC 840255592024
Series Electric Tank Water Heater
Cycle (Hz) 60
Min circuit ampacity (A) 18.7
Max fuse / breaker (A) 30
AHRI certified Yes
UL listed Yes
Parts warranty (years) 10 Year Parts Warranty
Shipping W x H x D (in) 22.73 x 64.97 x 22.73
Shipping weight (lbs) 132.28

Documents

WARNING: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.p65warnings.ca.gov.

Technical Specifications

Performance

System TypeWater Heater

Electrical & Fuel

Voltage208/240V
PhaseSingle Phase

Physical & Certifications

Dimensions (W x H x D)Φ19.35 x 59.93 x Φ19.35
Weight121.25 lb
Color / FinishGrey
Shipping & Delivery
Orders typically ship within 1-3 business days. Freight items are delivered by appointment to a curbside address; someone must be present to receive and inspect the shipment. Inspect for damage before signing. Returns are accepted within 30 days on unused, uninstalled equipment in original packaging -- return shipping and a restocking fee may apply. See our Shipping Policy and Return & Refund Policy for full terms.
Manufacturer Warranty

Covered by MRCOOL's limited warranty. Warranty terms are set by MRCOOL and differ by product line — whether registration is required, and whether the installation has to be performed by a state-licensed HVAC contractor, is not the same across the range. In every case coverage depends on the unit being installed according to MRCOOL's instructions and all applicable codes and permits. MRCOOL's warranty document for this model is the controlling source; ask us and we'll send you the one that applies.

Professional Installation Recommended

Most HVAC equipment must be installed and connected by a licensed professional to remain safe, code-compliant, and eligible for manufacturer warranty coverage. If you're unsure about installation requirements, contact us before you order.

Before You Order

Make sure it is the right size, and that you have the rest of it

Most outdoor units ship alone. If you are not certain of the capacity, or of what has to go with this unit, these two will work it out with you.

Still deciding on the right equipment?

Our HVAC specialists can help you confirm sizing and compatibility before you buy.