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MRCOOL 20 KW Universal Air Handler Heat Strip with Circuit Breaker, MHK20U

SKU MHK20U
by MRCOOL
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Description

MRCOOL 20 KW Universal Air Handler Heat Strip with Circuit Breaker (MHK20U)

Ultimate Backup Heat. Universal Power. Unmatched Comfort for Extra-Large Spaces.

For your largest residential or commercial projects, the MRCOOL 20 KW Universal Air Handler Heat Strip with Circuit Breaker delivers maximum heating performance—ensuring your clients stay warm and protected even in the most extreme winter conditions. Specially engineered for seamless integration with the MRCOOL Universal Air Handler 54K BTU (MDUI18048060E), this high-capacity heat kit is the ultimate solution for reliable, on-demand backup heat.

Why Install a Heat Kit?

Electric heat kits provide immediate, direct electric heating—up to 70,000 BTU—distributed efficiently throughout the ductwork. Essential for emergency or backup use, they keep homes and businesses comfortable when the primary heat pump is down or outdoor temperatures are at their lowest. Designed for short-term or supplemental use, this heat kit is the critical safeguard that ensures your customers’ comfort and peace of mind.

Hassle-Free Professional Installation
  • Perfectly compatible with the MRCOOL Universal Air Handler 54K BTU—for seamless, efficient installs.
  • Integrated circuit breaker—for enhanced safety, code compliance, and easy servicing.
  • Compact, installer-friendly design—12"W x 22"D x 7"H for convenient handling and flexible placement.
  • UL Listed—for trusted safety and quality.
Key Features for Your Business
  • 20 KW (65,001 – 70,000 BTU) heating capacity—ideal for spaces up to 2,800 sq. ft.
  • Reliable emergency and supplemental heat—keeps clients comfortable during system downtime or extreme cold
  • Voltage: 208-230V/60Hz/60A (verify your installation meets these requirements)
  • Max Fuse Breaker: 60/60A
  • Min Circuit Ampacity: 50A
The Professional’s Choice for Maximum Comfort

Don’t let your clients be caught off guard by winter’s extremes. The MRCOOL 20 KW Universal Air Handler Heat Strip with Circuit Breaker is your trusted solution for powerful, on-demand backup heat—delivering safety, comfort, and satisfaction with every Universal air handler installation.

Choose MRCOOL—where unmatched performance, reliability, and customer peace of mind always come standard.

PRODUCT SPECIFICATIONS:

Product Dimensions 12"W x 22"D x 7"H
Equipment Type Heat Kit
Heating Capacity 65,001 - 70,000 BTU
Estimated Coverage Area 2,800 square feet
Voltage Requires a minimum of 208-230V/60HZ/60A (please check your home meets this electrical requirement prior to purchase)
Phase 1
Cycle 60
Max Fuse Breaker 60/60A
Min Circuit Ampacity 50A
Color Gray
Auxiliary Heater Sizes 20 KW
Certificate UL Listed
Contains Electronics Yes
Proposition 65 Warning Yes
Restricted States GU;PR;VI
Shipping and Return

We offer Free Express Shipping on all of our products. Handling times are 1-2 business days and Delivery takes roughly 3-14 Business days 

For more Shipping information visit here

We offer a 2 Year (730 Day) return for our products. 

For more Return information visit here

COVERAGE AREA

HIVE WARRANTY

HVAC Hive Warranty Information:

HVAC Hive is an authorized dealer for every product on our website. Every HVAC system and component comes with its original manufacturer's warranty, guaranteeing you receive a functional, quality product.

Our 5-Year Parts & Labor Warranty Promise: We go beyond the standard coverage. If a manufacturer's warranty doesn't cover your product for a full 5 years, HVAC Hive will extend both parts and labor warranty to complete the 5-year coverage period.

Example: If your manufacturer covers 2 years parts & labor, we'll cover an additional 3 years — giving you a full 5 years of parts and labor protection.

Warranty Coverage Includes:

  • Parts replacement for manufacturing defects
  • Labor costs for covered repairs
  • System malfunctions and component failures

Warranty Details:

  • Residential, light commercial, and full commercial warranties vary based on your usage
  • Specific warranty terms and coverage periods are listed on each product page
  • Both parts and labor are covered under our extended warranty program

Making a Warranty Claim: Contact our Worker Bee Support team at 1-888-712-2465 or karim@hvachive.com . We'll handle your claim quickly and professionally, covering both parts and labor costs. You can also contact the manufacturer directly if preferred.

Questions? Need help understanding your parts & labor warranty coverage? Our team is here to explain the details and ensure you're fully protected.

Contact US
Request an Installer

Product Overview

  • Zone / ROOM:

    Zone / ROOM:

  • Air Handler BTU:

    Air Handler BTU:

  • Condenser BTU:

    Condenser BTU:

  • Outdoor Operating Temp (Cool/ heat):

    Outdoor Operating Temp (Cool/ heat):

  • Warranty

    Warranty

Description

MRCOOL 20 KW Universal Air Handler Heat Strip with Circuit Breaker (MHK20U)

Ultimate Backup Heat. Universal Power. Unmatched Comfort for Extra-Large Spaces.

For your largest residential or commercial projects, the MRCOOL 20 KW Universal Air Handler Heat Strip with Circuit Breaker delivers maximum heating performance—ensuring your clients stay warm and protected even in the most extreme winter conditions. Specially engineered for seamless integration with the MRCOOL Universal Air Handler 54K BTU (MDUI18048060E), this high-capacity heat kit is the ultimate solution for reliable, on-demand backup heat.

Why Install a Heat Kit?

Electric heat kits provide immediate, direct electric heating—up to 70,000 BTU—distributed efficiently throughout the ductwork. Essential for emergency or backup use, they keep homes and businesses comfortable when the primary heat pump is down or outdoor temperatures are at their lowest. Designed for short-term or supplemental use, this heat kit is the critical safeguard that ensures your customers’ comfort and peace of mind.

Hassle-Free Professional Installation
  • Perfectly compatible with the MRCOOL Universal Air Handler 54K BTU—for seamless, efficient installs.
  • Integrated circuit breaker—for enhanced safety, code compliance, and easy servicing.
  • Compact, installer-friendly design—12"W x 22"D x 7"H for convenient handling and flexible placement.
  • UL Listed—for trusted safety and quality.
Key Features for Your Business
  • 20 KW (65,001 – 70,000 BTU) heating capacity—ideal for spaces up to 2,800 sq. ft.
  • Reliable emergency and supplemental heat—keeps clients comfortable during system downtime or extreme cold
  • Voltage: 208-230V/60Hz/60A (verify your installation meets these requirements)
  • Max Fuse Breaker: 60/60A
  • Min Circuit Ampacity: 50A
The Professional’s Choice for Maximum Comfort

Don’t let your clients be caught off guard by winter’s extremes. The MRCOOL 20 KW Universal Air Handler Heat Strip with Circuit Breaker is your trusted solution for powerful, on-demand backup heat—delivering safety, comfort, and satisfaction with every Universal air handler installation.

Choose MRCOOL—where unmatched performance, reliability, and customer peace of mind always come standard.

PRODUCT SPECIFICATIONS:

Product Dimensions 12"W x 22"D x 7"H
Equipment Type Heat Kit
Heating Capacity 65,001 - 70,000 BTU
Estimated Coverage Area 2,800 square feet
Voltage Requires a minimum of 208-230V/60HZ/60A (please check your home meets this electrical requirement prior to purchase)
Phase 1
Cycle 60
Max Fuse Breaker 60/60A
Min Circuit Ampacity 50A
Color Gray
Auxiliary Heater Sizes 20 KW
Certificate UL Listed
Contains Electronics Yes
Proposition 65 Warning Yes
Restricted States GU;PR;VI
Shipping and Return

We offer Free Express Shipping on all of our products. Handling times are 1-2 business days and Delivery takes roughly 3-14 Business days 

For more Shipping information visit here

We offer a 2 Year (730 Day) return for our products. 

For more Return information visit here

COVERAGE AREA

HIVE WARRANTY

HVAC Hive Warranty Information:

HVAC Hive is an authorized dealer for every product on our website. Every HVAC system and component comes with its original manufacturer's warranty, guaranteeing you receive a functional, quality product.

Our 5-Year Parts & Labor Warranty Promise: We go beyond the standard coverage. If a manufacturer's warranty doesn't cover your product for a full 5 years, HVAC Hive will extend both parts and labor warranty to complete the 5-year coverage period.

Example: If your manufacturer covers 2 years parts & labor, we'll cover an additional 3 years — giving you a full 5 years of parts and labor protection.

Warranty Coverage Includes:

  • Parts replacement for manufacturing defects
  • Labor costs for covered repairs
  • System malfunctions and component failures

Warranty Details:

  • Residential, light commercial, and full commercial warranties vary based on your usage
  • Specific warranty terms and coverage periods are listed on each product page
  • Both parts and labor are covered under our extended warranty program

Making a Warranty Claim: Contact our Worker Bee Support team at 1-888-712-2465 or karim@hvachive.com . We'll handle your claim quickly and professionally, covering both parts and labor costs. You can also contact the manufacturer directly if preferred.

Questions? Need help understanding your parts & labor warranty coverage? Our team is here to explain the details and ensure you're fully protected.

Contact US

Commercial HVAC PROS!

Unlock Installer Benefits Now:

  • ✓ Exclusive BULK Pricing
  • ✓ Limited Time Deals
  • ✓ Unmatched Service & Support
  • ✓ Technical support
  • ✓ Extended Warranty & Maintenance
"Their technical expertise in commercial HVAC systems is outstanding. From equipment selection to installation support, they provided everything we needed. The bulk pricing saved us thousands on our multi-building project, and their 24/7 technical support kept us running smoothly."
- Marcus R., HVAC Project Manager, 06/24

You'll hear from us during business hours

Request an Installer

Need Professional Installation?

Get Connected with Certified HVAC Installers:

  • ✓ Pre-Vetted, Licensed & Insured Installers
  • ✓ 2-3 Local Options in Your Area
  • ✓ Specialists in Your Equipment Type
  • ✓ Competitive, Transparent Pricing
  • ✓ Fast Response - Within 24 Hours

How it works:

1. Fill out the form below with your project details
2. We'll match you with 2-3 qualified installers in your area
3. Installers contact you directly with quotes and availability
4. You choose the best fit for your project

"I bought a heat pump online but wasn't sure about installation. HVAC Hive connected me with three local contractors within hours. I chose one based on reviews and pricing - he installed it perfectly the next week. Made the whole process so much easier!"
- Jennifer M., Homeowner, Phoenix AZ

✓ No obligation quotes | ✓ All installers background checked | ✓ Free service - you only pay the installer

We'll connect you with installers within 48 hours during business days

Frequently Asked Questions about MRCOOL 20 KW Universal Air Handler Heat Strip with Circuit Breaker, MHK20U

Most Frequently Asked Questions

For a 20kW heat strip operating on 240V, you typically need a 100-amp double-pole breaker (since 20,000 watts ÷ 240 volts = 83.3 amps; rounded up and accounting for code requirements and startup surge). Always consult the product manual and a licensed electrician to confirm the exact breaker size for your specific installation and local code.
Some air handlers come with a factory-installed circuit breaker, but many do not; typically, a properly sized external circuit breaker is required in the electrical panel to protect the air handler and comply with code. Always check your specific air handler’s documentation for details.
A 20kW heat strip produces approximately 68,000 BTUs per hour (since 1 kW = 3,412 BTU/hr, so 20 × 3,412 = 68,240 BTU/hr).

Other Questions

Your air handler may have two breakers because one is dedicated to powering the air handler’s blower and controls, while the other is for an electric heat strip or auxiliary heating element, each requiring separate circuits for proper operation and safety.
A 20kW heater operating on 240 volts will pull approximately 83 amps (20,000 watts ÷ 240 volts = 83.3 amps).

Reviews

Express Free Shipping

Process orders within 1-2 days

Stress Free Returns

Get Covered for (730 days) Returns

Premum Quality

Top Tier Products, Even Better Customer Care

5 Year Warranty

We Believe In Our Products & Our Team