MRCOOL UHK20 20kW Electric Heat Kit with Dual Circuit Breakers – Universal Series (R-454B)

The MRCOOL UHK20 20kW Heat Kit provides maximum supplemental electric heat for MRCOOL Universal Series R-454B air handlers. With dual built-in circuit breakers and factory-engineered components, this high-capacity heat kit installs inside compatible Universal indoor units to deliver powerful comfort in extreme cold weather.

Product Overview

The MRCOOL UHK20 Electric Heat Kit is the top-output auxiliary heating option for the Universal Series lineup. Designed for installations that demand serious electric backup heat, the 20kW capacity ensures rapid temperature recovery and stable heating performance when outdoor conditions are at their harshest.

According to the Universal Series Heat Kit specifications, the UHK20 uses dual circuit breakers, four heating relays, and multiple power cord groups to safely handle the higher electrical load. It mounts directly inside approved Universal air handlers and connects using the included wiring diagram and hardware, making it a clean, integrated solution for residential or light commercial systems that need maximum auxiliary heat capacity.

Features

• High-output 20kW auxiliary electric heat capacity
• Dual built-in circuit breakers for safety and protection
• Factory-certified accessory for MRCOOL Universal Series (R-454B)
• Delivers strong heating support in extreme low-temperature conditions
• Internal mount design keeps installation clean and streamlined
• Includes wiring diagram, breaker label, gasket, and mounting hardware
• Compatible with 208/230V single-phase power
• OEM-grade heating elements and components for long-term reliability

Compatible With

The UHK20 Heat Kit is compatible with the following MRCOOL Universal Series R-454B Air Handlers:

• UAH18036-O
• UAH18048-O
• UAH18060-O

(Compatibility based on the MRCOOL Universal Series Heat Kit model selection chart.)

Technical Specifications

Brand	MRCOOL
Series	Universal R-454B
Model	UHK20
Unit Type	Universal Series Heat Kit
Heater Capacity	20kW
Voltage	208/230V
Phase	1
Cycle	60 Hz
Internal Protection	Dual Circuit Breakers
Heater Amps (Ckt 1)	36.0/40.0 A
MCA (Ckt 1)	46.0/53.0
MOP (Ckt 1)	50.0/60.0
Heater Amps (Ckt 2)	36.0/40.0 A
MCA (Ckt 2)	46.0/53.0
MOP (Ckt 2)	50.0/60.0
Net Depth	22 in
Net Height	8.13 in
Net Width	10.63 in
Net Weight	4.5 lbs
Gross Depth	25.63 in
Gross Height	10.25 in
Gross Width	15 in
Gross Weight	12.1 lbs