MrCool Universal 8 kW Electric Heat Kit with Circuit Breaker – Fits 2–4 Ton Central Ducted Air Handler (UHK08)

MrCool Universal Series 8 kW Electric Heat Kit Overview

Cold-Climate Backup Heat. Emergency Heat Ready. Plug-and-Play Installation.

The MrCool Universal Series 8 kW Electric Heat Kit delivers supplemental and emergency backup heat for your MrCool Universal Series Multi-Position Air Handler — ensuring dependable warmth during extreme cold, defrost cycles, or unexpected heat pump downtime. Designed specifically for the Universal Series platform, this heat kit installs quickly into compatible air handlers with an integrated circuit breaker for safe, straightforward setup.

Reliable Cold-Climate Performance

Even the most efficient heat pumps lose some output when outdoor temperatures drop into the teens or single digits. The 8 kW Heat Kit adds approximately 27,304 BTU of backup heating capacity — keeping your home warm on the coldest nights and covering defrost-cycle heat loss so your thermostat never drops below setpoint.

Emergency Heat Ready

Provides true emergency heat capability. If your heat pump goes down in winter due to a service issue, the electric heat kit automatically takes over — keeping your home warm and your family safe until a technician can make repairs. For homeowners in cold-climate regions, this is essential peace of mind.

Integrated Circuit Breaker

The built-in circuit breaker simplifies installation and provides on-unit electrical protection, eliminating the need for a separate breaker panel circuit in many installations. Your installer can wire and commission the kit faster, reducing installation labor costs.

Compatible Air Handlers

This heat kit is specifically engineered for MrCool Universal Series Multi-Position Air Handlers in the following sizes:

• 2 Ton (24K)
• 2.5 Ton (30K)
• 3 Ton (36K)
• 4 Ton (48K)

Compatible Air Handler SKUs: UAH18024-O, UAH18030-O, UAH18036-O, UAH18048-O

Professional Installation Recommended

Installation should be performed by a licensed HVAC or electrical professional. The heat kit wires directly into the air handler's integrated electrical terminals and requires proper amperage sizing on the home's electrical panel — your installer will verify service capacity before installation.

Features

• 8 kW heating output (~27,304 BTU/hr at 208/230V)
• Integrated circuit breaker for simplified installation
• Compatible with Universal Series air handlers: 2 – 4 Ton
• 208/230V, single-phase, 60 Hz
• Plug-and-play installation into compatible air handler cabinet
• Provides backup heat for defrost cycles and cold-climate performance
• Emergency heat ready — takes over if heat pump goes down
• Designed and tested specifically for MrCool Universal Series R-454B platform
• ETL listed