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Aux/Emergency Heat

MRCOOL Universal (2nd Gen) Air Handler Electric Heat Kit w/ Circuit Breaker — 5kW, 8kW, 10kW, 15kW, 20kW

MRCOOL Universal (2nd Gen) Air Handler Electric Heat Kit w/ Circuit Breaker — 5kW, 8kW, 10kW, 15kW, 20kW

Regular price $181.00 USD
Regular price Sale price $181.00 USD
Sale Sold out
Shipping calculated at checkout.

SKUUHK05

TypeHeat Kit

✅ This item is in stock!

More than 30 available

Estimated Delivery: November 29 – December 01

Based on order date & typical delivery times.
• Orders Typically ship within 2 business days

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PRODUCT DESCRIPTION

Upgrade your MRCOOL Universal 2nd Gen central ducted system with a factory-matched Electric Heat (Emergency/Aux) Kit. This add-on installs in the air handler and provides an extra boost of electric heat when outdoor temperatures drop well below your heat pump’s rated heating range—helping maintain comfort during cold snaps.

Available sizes: 5kW • 8kW • 10kW • 15kW • 20kW
Includes: model-specific heat strip assembly with integrated circuit breaker

Why add a heat kit?

  • Cold-weather backup: Heat pumps naturally lose heating capacity as outdoor temps fall. The heat kit supplies aux/emergency heat to cover those lows.

  • Comfort & reliability: Smooth transitions during defrost and extreme weather.

  • Factory-matched fit: Designed for MRCOOL Universal 2nd Gen air handlers for correct airflow, safeties, and wiring.

Which size should I choose?

  • Smaller air handlers → smaller kW (check your model label/manual).

  • Warmer/Southern climates: often optional; a smaller kW is typically sufficient for rare cold snaps.

  • Colder/Northern climates: recommended; choose a larger kW where supply power and air handler size allow.

Tip: Match heat-kit kW to your air handler model and available electrical capacity. When in doubt, contact us and we’ll confirm the best fit.

Key features

  • Circuit breaker included for the kit (model-specific)

  • Aux/Emergency heat for sub-freezing weather

  • Designed for MRCOOL Universal 2nd Gen air handlers

  • DIY-friendly for confident installers; professional assistance recommended where required by code

Compatibility

  • For MRCOOL Universal 2nd Gen central ducted air handlers only.

  • Heat kits are model-specific. Please verify your exact air-handler model number and electrical specs before ordering. We’re happy to help you confirm.

What’s in the box

  • Electric heat strip assembly (size selected)

  • Integrated circuit breaker (factory-matched)

  • Mounting hardware (varies by model)

  • Install/connection guide

Installation & safety notes

  • Turn off power at the disconnect/breaker before service.

  • Use proper wire gauge and overcurrent protection per the air handler/kit nameplate and local code.

  • Ensure airflow and duct static pressure meet the air handler’s requirements when running electric heat.

  • A licensed electrician/HVAC professional may be required by local code.


Need help choosing 5kW, 8kW, 10kW, 15kW, or 20kW?
Send us your air-handler model number, climate/zip code, and available breaker size—we’ll recommend the right kit for your system.

WHAT'S INCLUDED

  • Circuit Breaker

  • Heat Strip

Rated 4.7 / 5 Stars
4700+ Verified Reviews

Comfort That Speaks for Itself

See why homeowners and pros alike trust MRCOOL DIY systems to deliver comfort, savings, and easy installation.

Installed a 3-zone MRCOOL DIY in our ranch house — took a weekend and some planning, but it went smoother than expected.

Ryan G., Oklahoma

We upgraded to the MRCOOL Universal central ducted system last year. It’s quieter, more efficient, and runs smoother than our old 4-ton unit. Love that I installed it myself

James H., Alabama

HVAC quotes were outrageous. The MRCOOL Universal let me handle the install myself and saved me about $3,000. It’s been running flawlessly for eight months.

Eric T., Colorado

The Universal outdoor unit is much smaller than my old condenser but somehow does a better job heating and cooling our 2,000-sq-ft home. Couldn’t be happier

Paul F., Virginia

We live in Minnesota, and the MRCOOL Universal kept our home cozy even during sub-zero nights — that heat pump is a beast.

Amanda P., Minnesota

Replaced our outdated 3-ton system with a MRCOOL central ducted heat pump. Took a few evenings after work, but once powered up, it cooled our entire home faster and quieter than expected.

Thomas W., South Carolina

Installed a 3-zone MRCOOL DIY in our ranch house — took a weekend and some planning, but it went smoother than expected.

Ryan G., Oklahoma

We upgraded to the MRCOOL Universal central ducted system last year. It’s quieter, more efficient, and runs smoother than our old 4-ton unit. Love that I installed it myself

James H., Alabama

HVAC quotes were outrageous. The MRCOOL Universal let me handle the install myself and saved me about $3,000. It’s been running flawlessly for eight months.

Eric T., Colorado

The Universal outdoor unit is much smaller than my old condenser but somehow does a better job heating and cooling our 2,000-sq-ft home. Couldn’t be happier

Paul F., Virginia

We live in Minnesota, and the MRCOOL Universal kept our home cozy even during sub-zero nights — that heat pump is a beast.

Amanda P., Minnesota

Replaced our outdated 3-ton system with a MRCOOL central ducted heat pump. Took a few evenings after work, but once powered up, it cooled our entire home faster and quieter than expected.

Thomas W., South Carolina

Installed a 3-zone MRCOOL DIY in our ranch house — took a weekend and some planning, but it went smoother than expected.

Ryan G., Oklahoma

We upgraded to the MRCOOL Universal central ducted system last year. It’s quieter, more efficient, and runs smoother than our old 4-ton unit. Love that I installed it myself

James H., Alabama

HVAC quotes were outrageous. The MRCOOL Universal let me handle the install myself and saved me about $3,000. It’s been running flawlessly for eight months.

Eric T., Colorado

The Universal outdoor unit is much smaller than my old condenser but somehow does a better job heating and cooling our 2,000-sq-ft home. Couldn’t be happier

Paul F., Virginia

We live in Minnesota, and the MRCOOL Universal kept our home cozy even during sub-zero nights — that heat pump is a beast.

Amanda P., Minnesota

Replaced our outdated 3-ton system with a MRCOOL central ducted heat pump. Took a few evenings after work, but once powered up, it cooled our entire home faster and quieter than expected.

Thomas W., South Carolina

Installed a 3-zone MRCOOL DIY in our ranch house — took a weekend and some planning, but it went smoother than expected.

Ryan G., Oklahoma

We upgraded to the MRCOOL Universal central ducted system last year. It’s quieter, more efficient, and runs smoother than our old 4-ton unit. Love that I installed it myself

James H., Alabama

HVAC quotes were outrageous. The MRCOOL Universal let me handle the install myself and saved me about $3,000. It’s been running flawlessly for eight months.

Eric T., Colorado

The Universal outdoor unit is much smaller than my old condenser but somehow does a better job heating and cooling our 2,000-sq-ft home. Couldn’t be happier

Paul F., Virginia

We live in Minnesota, and the MRCOOL Universal kept our home cozy even during sub-zero nights — that heat pump is a beast.

Amanda P., Minnesota

Replaced our outdated 3-ton system with a MRCOOL central ducted heat pump. Took a few evenings after work, but once powered up, it cooled our entire home faster and quieter than expected.

Thomas W., South Carolina

Installed a 3-zone MRCOOL DIY in our ranch house — took a weekend and some planning, but it went smoother than expected.

Ryan G., Oklahoma

We upgraded to the MRCOOL Universal central ducted system last year. It’s quieter, more efficient, and runs smoother than our old 4-ton unit. Love that I installed it myself

James H., Alabama

HVAC quotes were outrageous. The MRCOOL Universal let me handle the install myself and saved me about $3,000. It’s been running flawlessly for eight months.

Eric T., Colorado

The Universal outdoor unit is much smaller than my old condenser but somehow does a better job heating and cooling our 2,000-sq-ft home. Couldn’t be happier

Paul F., Virginia

We live in Minnesota, and the MRCOOL Universal kept our home cozy even during sub-zero nights — that heat pump is a beast.

Amanda P., Minnesota

Replaced our outdated 3-ton system with a MRCOOL central ducted heat pump. Took a few evenings after work, but once powered up, it cooled our entire home faster and quieter than expected.

Thomas W., South Carolina

Installed a 3-zone MRCOOL DIY in our ranch house — took a weekend and some planning, but it went smoother than expected.

Ryan G., Oklahoma

We upgraded to the MRCOOL Universal central ducted system last year. It’s quieter, more efficient, and runs smoother than our old 4-ton unit. Love that I installed it myself

James H., Alabama

HVAC quotes were outrageous. The MRCOOL Universal let me handle the install myself and saved me about $3,000. It’s been running flawlessly for eight months.

Eric T., Colorado

The Universal outdoor unit is much smaller than my old condenser but somehow does a better job heating and cooling our 2,000-sq-ft home. Couldn’t be happier

Paul F., Virginia

We live in Minnesota, and the MRCOOL Universal kept our home cozy even during sub-zero nights — that heat pump is a beast.

Amanda P., Minnesota

Replaced our outdated 3-ton system with a MRCOOL central ducted heat pump. Took a few evenings after work, but once powered up, it cooled our entire home faster and quieter than expected.

Thomas W., South Carolina

Installed a 3-zone MRCOOL DIY in our ranch house — took a weekend and some planning, but it went smoother than expected.

Ryan G., Oklahoma

We upgraded to the MRCOOL Universal central ducted system last year. It’s quieter, more efficient, and runs smoother than our old 4-ton unit. Love that I installed it myself

James H., Alabama

HVAC quotes were outrageous. The MRCOOL Universal let me handle the install myself and saved me about $3,000. It’s been running flawlessly for eight months.

Eric T., Colorado

The Universal outdoor unit is much smaller than my old condenser but somehow does a better job heating and cooling our 2,000-sq-ft home. Couldn’t be happier

Paul F., Virginia

We live in Minnesota, and the MRCOOL Universal kept our home cozy even during sub-zero nights — that heat pump is a beast.

Amanda P., Minnesota

Replaced our outdated 3-ton system with a MRCOOL central ducted heat pump. Took a few evenings after work, but once powered up, it cooled our entire home faster and quieter than expected.

Thomas W., South Carolina

Installed a 3-zone MRCOOL DIY in our ranch house — took a weekend and some planning, but it went smoother than expected.

Ryan G., Oklahoma

We upgraded to the MRCOOL Universal central ducted system last year. It’s quieter, more efficient, and runs smoother than our old 4-ton unit. Love that I installed it myself

James H., Alabama

HVAC quotes were outrageous. The MRCOOL Universal let me handle the install myself and saved me about $3,000. It’s been running flawlessly for eight months.

Eric T., Colorado

The Universal outdoor unit is much smaller than my old condenser but somehow does a better job heating and cooling our 2,000-sq-ft home. Couldn’t be happier

Paul F., Virginia

We live in Minnesota, and the MRCOOL Universal kept our home cozy even during sub-zero nights — that heat pump is a beast.

Amanda P., Minnesota

Replaced our outdated 3-ton system with a MRCOOL central ducted heat pump. Took a few evenings after work, but once powered up, it cooled our entire home faster and quieter than expected.

Thomas W., South Carolina

Installed a 3-zone MRCOOL DIY in our ranch house — took a weekend and some planning, but it went smoother than expected.

Ryan G., Oklahoma

We upgraded to the MRCOOL Universal central ducted system last year. It’s quieter, more efficient, and runs smoother than our old 4-ton unit. Love that I installed it myself

James H., Alabama

HVAC quotes were outrageous. The MRCOOL Universal let me handle the install myself and saved me about $3,000. It’s been running flawlessly for eight months.

Eric T., Colorado

The Universal outdoor unit is much smaller than my old condenser but somehow does a better job heating and cooling our 2,000-sq-ft home. Couldn’t be happier

Paul F., Virginia

We live in Minnesota, and the MRCOOL Universal kept our home cozy even during sub-zero nights — that heat pump is a beast.

Amanda P., Minnesota

Replaced our outdated 3-ton system with a MRCOOL central ducted heat pump. Took a few evenings after work, but once powered up, it cooled our entire home faster and quieter than expected.

Thomas W., South Carolina

Installed a 3-zone MRCOOL DIY in our ranch house — took a weekend and some planning, but it went smoother than expected.

Ryan G., Oklahoma

We upgraded to the MRCOOL Universal central ducted system last year. It’s quieter, more efficient, and runs smoother than our old 4-ton unit. Love that I installed it myself

James H., Alabama

HVAC quotes were outrageous. The MRCOOL Universal let me handle the install myself and saved me about $3,000. It’s been running flawlessly for eight months.

Eric T., Colorado

The Universal outdoor unit is much smaller than my old condenser but somehow does a better job heating and cooling our 2,000-sq-ft home. Couldn’t be happier

Paul F., Virginia

We live in Minnesota, and the MRCOOL Universal kept our home cozy even during sub-zero nights — that heat pump is a beast.

Amanda P., Minnesota

Replaced our outdated 3-ton system with a MRCOOL central ducted heat pump. Took a few evenings after work, but once powered up, it cooled our entire home faster and quieter than expected.

Thomas W., South Carolina