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

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.