MRCOOL HeatWise™ 4500 Watt Tall Electric Tank Water Heater - 50 Gallon Capacity, MTWH04550ET

The MRCOOL® HeatWise™ 50-Gallon Tall Electric Tank Water Heater brings full large-household capacity to installations where a standard-diameter tank is not an option. At 20.5" in diameter and 60.1" tall, the MTWH04550ET is purpose-built for utility closets, narrow mechanical rooms, and tight vertical spaces that would otherwise rule out a 50-gallon unit entirely. The same 4,500W element at 240/208V drives performance across a 90–150°F adjustable range, and an anti-bacterial enameled tank paired with a ceramic-coated heating element keeps corrosion resistance built into the foundation. A patented Rare Earth Anode rod outlasts conventional magnesium rods by 50%, while a self-cleaning flow guide continuously clears sediment without manual intervention. AHRI Certified and cULus Listed, and backed by a 10-year parts warranty, a 10-year tank warranty, and a 1-year limited labor warranty.

• 50-Gallon Tall Configuration: The MTWH04550ET delivers a full 50-gallon hot water reserve in a tall, narrow profile measuring 20.5" in diameter and 60.1" in height, powered by a 4,500W element at 240/208V with a 90–150°F temperature range and a max working pressure of 149.39 PSI.
• Space-Optimized Footprint: With a diameter more than 3" slimmer than the standard 50-gallon MTWH04550E, the ET configuration installs cleanly in utility closets, narrow alcoves, and mechanical rooms where a conventional tank cannot be accommodated without sacrificing capacity.
• Anti-Bacterial Enameled Tank: A 2mm steel shell with a 0.25–0.5mm anti-bacterial enamel lining resists corrosion and inhibits bacterial growth, protecting water quality and structural integrity through years of high-demand daily use.
• Patented Rare Earth Anode Rod: MRCOOL®'s proprietary Rare Earth Anode rod outlasts standard magnesium anode rods by 50%, providing superior internal tank protection and a measurably extended service life.
• Ceramic-Coated Heating Elements: Enamel-coated heating elements resist scale accumulation and corrosion, maintaining consistent heat transfer efficiency and reducing the maintenance burden over the full life of the unit.
• Flow Guide Self-Cleaning: An integrated flow guide agitates sediment during normal operation, continuously flushing mineral deposits before they compromise heating efficiency or tank integrity.
• Durable Brass Ball Valve: A solid brass ball valve at the 3/4" NPT water connection delivers a corrosion-resistant, leak-proof shutoff built to outlast plastic alternatives across years of continuous service.
• Industry-Backed Warranty: Protected by a 10-year parts warranty, 10-year tank warranty, and 1-year limited labor warranty for single-family residential installations, with AHRI Certification and cULus Listing confirming compliance with North American safety and performance standards.