The MRCOOL HeatWise is a 4,500 Watt electric tank water heater offered here in seven models: 30, 40 and 50-gallon standard tanks, 28 and 38-gallon lowboy tanks and 40 and 50-gallon tall tanks. It runs on 240V or 208V single phase and heats water to any setting from 90°F to 150°F, shipped at 120°F.
The standard tanks suit a straight replacement in a utility room, garage or basement; the lowboy models stand about 30" to 32" high for spots with little headroom, and the tall models are about 60" high on a 19.3" or 20.5" footprint for narrow closets. Inside, an anti-bacterial enameled tank, a rare earth anode rod and ceramic-coated elements are built to slow corrosion and scale. Installation is by a licensed plumber and electrician. That is the HeatWise electric tank water heater.
Features
4,500W Heating Elements
Rated 4,500W at 240V, or 3,380W on a 208V supply.
Seven Tank Sizes
Standard 30, 40 and 50-gallon tanks, lowboy 28 and 38-gallon tanks about 30" to 32" high, and tall 40 and 50-gallon tanks about 60" high on a slimmer footprint.
Anti-Bacterial Enamel Tank
A 0.25 to 0.5 mm enamel coating lines the 2 mm steel inner tank to limit odor, scale and bacterial growth.
Rare Earth Anode Rod
MRCOOL's patented magnesium rare earth anode is rated to last 50% longer than standard anode rods.
Ceramic-Coated Elements
The coating on the heating elements helps resist mineral buildup.
Flow Guide Self Cleaning
Helps keep sediment from settling and building up inside the tank.
Brass Ball Valve
A solid brass ball valve in place of a plastic valve.
Adjustable 90°F to 150°F
Thermostats behind the access panels are factory set at 120°F.
Specifications
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Voltage: 208/240V
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Phase: 1
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Frequency: 60 Hz
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Minimum Circuit Ampacity: 18.7 A
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AHRI Certified: Yes
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UL Listed: Yes
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Recommended Breaker: 25 A (240V), 20 A (208V)
28 gal, lowboy
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Model: MTWH04528EL
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Dimensions: 20.05" dia. x 30.1"H
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Weight: 81.57 lbs
30 gal
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Model: MTWH04530E
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Dimensions: 21.6" dia. x 36.7"H
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Weight: 99.2 lbs
38 gal, lowboy
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Model: MTWH04538EL
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Dimensions: 22.8" dia. x 32.1"H
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Weight: 108.03 lbs
40 gal
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Model: MTWH04540E
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Dimensions: 21.6" dia. x 45.5"H
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Weight: 114.6 lbs
40 gal, tall
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Model: MTWH04540ET
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Dimensions: 19.3" dia. x 59.9"H
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Weight: 121.25 lbs
50 gal
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Model: MTWH04550E
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Dimensions: 23.8" dia. x 45.6"H
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Weight: 127.87 lbs
50 gal, tall
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Model: MTWH04550ET
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Dimensions: 20.5" dia. x 60.1"H
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Weight: 132.28 lbs
What's Included
- MRCOOL HeatWise 4,500 Watt electric tank water heater
- Two 24" sections of pipe insulation
- Energy cover (side and top insulation with tape strips), lowboy 28 and 38-gallon models only
- Installation and user manual
Installation
Professional installation required. This equipment must be installed by a qualified, licensed electrician or contractor, following MRCOOL's installation manual and all local electrical and building codes and permit requirements. MRCOOL's limited warranty applies only to units installed that way, and it does not cover installation labor.
Install indoors in a clean, dry area protected from freezing, never in a bathroom or outdoors, on a floor that can carry the filled tank, with room to remove the thermostat and element access panels. Water connections are 3/4" NPT. Fit a temperature and pressure relief valve rated no more than 150 PSI, piped to an open drain with the outlet no higher than 6" above the floor, and an expansion tank on closed water systems. Use a drained catch pan where a leak could cause damage, and strap the tank where local code requires it. Fill the tank completely before switching on power. Wire to a separate grounded, GFCI-protected 240V or 208V circuit with copper conductors.
Resources
Shipping, Returns & Warranty
Ships to addresses in the United States only. Shipping cost is calculated at checkout.
Inspect the packaging and the product before you sign. Note any damage or shortage on the delivery receipt, then email photos to support@mycleansupplies.com within 48 hours of delivery so the freight claim can be filed. Damage reported after 48 hours can't be claimed.
MRCOOL handles returns through the store you bought from, so your return comes to us. Unopened, unused MRCOOL equipment can be returned within 21 days of delivery with a return authorization from us. You pay the return shipping, and a restocking fee of up to 20% may be deducted along with payment processing fees. Opened, installed or used equipment and special-order items can't be returned.
For the original owner with proof of purchase, MRCOOL's non-transferable limited warranty provides a 10-year tank warranty, a 10-year parts warranty and a 1-year limited labor warranty when the heater serves domestic hot water in a single-family residence. Any other application reduces all three terms to 1 year, and the labor coverage starts on the 31st day after the proof-of-purchase date. Full terms, registration steps and exclusions are in the MRCOOL warranty document under Resources.
Warranty claims. MRCOOL handles warranty claims directly through support.mrcool.com or (270) 366-0457. Some MRCOOL warranties cover the original purchaser only. Systems that aren't DIY need a valid installation invoice to open a claim.
About MRCOOL
MRCOOL designs heating, cooling and water-heating equipment from its home base in Hickory, Kentucky. The range runs from DIY ductless mini-splits, built around MRCOOL's patented pre-charged Quick Connect line sets, through contractor-installed mini-splits, central split systems, packaged units and gas furnaces, to HeatWise water heaters and CoolBlade HVLS fans for warehouses and shops.
HeatWise is MRCOOL's electric tank water heater line, built around 4,500W heating elements. This listing covers all seven models: the 30, 40 and 50-gallon standard tanks, the 28 and 38-gallon lowboy tanks for spaces with little headroom, and the 40 and 50-gallon tall tanks for narrow closets. HeatWise sits alongside MRCOOL's heat pumps and air handlers as the brand's water-heating range.
