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MRCOOL 5 KW Universal Air Handler Heat Strip with Circuit Breaker, MHK05U

SKU MHK05U
by MRCOOL
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Description

MRCOOL 5 KW Universal Air Handler Heat Strip with Circuit Breaker (MHK05U)

Essential Backup Heat. Universal Compatibility. Reliable Comfort for Every Installation.

Ensure your customers stay warm and comfortable, no matter how cold it gets, with the MRCOOL 5 KW Universal Air Handler Heat Strip with Circuit Breaker. Specifically designed for the MRCOOL Universal Air Handler 36K BTU (MDUI18024036E), this UL-listed heat kit provides immediate, dependable supplemental heat—delivered right through the ductwork.

Why Install a Heat Kit?

Heat kits offer instant, direct electric heating—up to 20,000 BTU—making them crucial for emergency situations or when outside temperatures drop below what a heat pump can handle. Designed for short-term or supplemental use, this heat kit acts as a safety net, ensuring your clients are never left in the cold.

Hassle-Free Professional Installation
  • Perfectly compatible with the MRCOOL Universal Air Handler 36K BTU—guarantees seamless integration and quick installations.
  • Integrated circuit breaker—for enhanced safety, code compliance, and easy future servicing.
  • Compact, lightweight design—at just 12"W x 22"D x 7"H, it’s easy to handle and install, even in tight spaces.
  • UL Listed—for safety and quality assurance.
Key Features for Your Business
  • 5 KW (15,001 – 20,000 BTU) heating capacity—ideal for spaces up to 800 sq. ft.
  • Reliable emergency and supplemental heat—keeps clients comfortable during system downtime or extreme cold
  • Voltage: 208/230V/60Hz/25-30A (confirm your installation meets these requirements)
  • Max Fuse Breaker: 30A
  • Min Circuit Ampacity: 25A
The Professional’s Choice for Dependable Comfort

Don’t leave your clients vulnerable to winter’s chill. The MRCOOL 5 KW Universal Air Handler Heat Strip with Circuit Breaker is your go-to solution for on-demand backup heat—delivering safety, comfort, and satisfaction with every Universal air handler installation.

Choose MRCOOL—where reliability, performance, 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 15,001 - 20,000 BTU
Estimated Coverage Area 800 square feet
Voltage Requires a minimum of 208/230V/60HZ/25-30A (please check your home meets this electrical requirement prior to purchase)
Phase 1
Cycle 60
Max Fuse Breaker 30A
Min Circuit Ampacity 25A
Color Gray
Auxiliary Heater Sizes 5 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 5 KW Universal Air Handler Heat Strip with Circuit Breaker (MHK05U)

Essential Backup Heat. Universal Compatibility. Reliable Comfort for Every Installation.

Ensure your customers stay warm and comfortable, no matter how cold it gets, with the MRCOOL 5 KW Universal Air Handler Heat Strip with Circuit Breaker. Specifically designed for the MRCOOL Universal Air Handler 36K BTU (MDUI18024036E), this UL-listed heat kit provides immediate, dependable supplemental heat—delivered right through the ductwork.

Why Install a Heat Kit?

Heat kits offer instant, direct electric heating—up to 20,000 BTU—making them crucial for emergency situations or when outside temperatures drop below what a heat pump can handle. Designed for short-term or supplemental use, this heat kit acts as a safety net, ensuring your clients are never left in the cold.

Hassle-Free Professional Installation
  • Perfectly compatible with the MRCOOL Universal Air Handler 36K BTU—guarantees seamless integration and quick installations.
  • Integrated circuit breaker—for enhanced safety, code compliance, and easy future servicing.
  • Compact, lightweight design—at just 12"W x 22"D x 7"H, it’s easy to handle and install, even in tight spaces.
  • UL Listed—for safety and quality assurance.
Key Features for Your Business
  • 5 KW (15,001 – 20,000 BTU) heating capacity—ideal for spaces up to 800 sq. ft.
  • Reliable emergency and supplemental heat—keeps clients comfortable during system downtime or extreme cold
  • Voltage: 208/230V/60Hz/25-30A (confirm your installation meets these requirements)
  • Max Fuse Breaker: 30A
  • Min Circuit Ampacity: 25A
The Professional’s Choice for Dependable Comfort

Don’t leave your clients vulnerable to winter’s chill. The MRCOOL 5 KW Universal Air Handler Heat Strip with Circuit Breaker is your go-to solution for on-demand backup heat—delivering safety, comfort, and satisfaction with every Universal air handler installation.

Choose MRCOOL—where reliability, performance, 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 15,001 - 20,000 BTU
Estimated Coverage Area 800 square feet
Voltage Requires a minimum of 208/230V/60HZ/25-30A (please check your home meets this electrical requirement prior to purchase)
Phase 1
Cycle 60
Max Fuse Breaker 30A
Min Circuit Ampacity 25A
Color Gray
Auxiliary Heater Sizes 5 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 5 KW Universal Air Handler Heat Strip with Circuit Breaker, MHK05U

Most Frequently Asked Questions

For a 5kW heat strip on 240V, you typically need a 30-amp double-pole breaker (since 5,000 watts ÷ 240 volts = 20.8 amps; code requires rounding up to the next standard size and accounting for continuous load). Always confirm with the product manual and a licensed electrician for your specific installation and local code requirements.
A 5 kW heat strip operating on 240 volts pulls approximately 20.8 amps (5,000 watts ÷ 240 volts = 20.8 amps).
The required breaker size for a heat pump air handler depends on the specific model and whether it includes electric heat strips, but most residential air handlers typically require a 15- to 60-amp double-pole breaker. Always consult the unit’s nameplate, installation manual, and a licensed electrician to determine the correct breaker size for your setup and local code.

Other Questions

Some air handlers include a factory-installed circuit breaker, but many do not; typically, a properly sized external circuit breaker in your electrical panel is required to protect the air handler and meet code requirements. Always consult your specific air handler’s documentation for details.
Yes, an air handler typically requires a dedicated circuit to ensure safe operation, prevent overloading, and comply with electrical codes.

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