Quick answers to questions about ordering, compatibility, and installation.
The MRCOOL UHK08 8kW Heat Kit delivers powerful supplemental electric heat for MRCOOL Universal Series R-454B air handlers. Designed with an integrated circuit breaker and OEM-grade components, this kit installs directly inside compatible Universal indoor units to provide reliable warmth during demanding cold-weather conditions.
The MRCOOL UHK08 Electric Heat Kit is a factory-engineered auxiliary electric heating module that enhances the performance of compatible MRCOOL Universal Series air handlers. Ideal for colder climates, the 8kW capacity provides fast, stable, and efficient heat output when additional heating is needed.
According to the Universal Series Heat Kit Installation Manual, the UHK08 uses dual heating relays and works seamlessly with approved UAH-series air handlers. Its plug-in integration design, safety protections, and durable construction make it a reliable choice for residential or light commercial applications.
The UHK08 Heat Kit is compatible with the following MRCOOL Universal Series R-454B Air Handlers:
(Compatibility verified via Universal Series Heat Kit model table.)
| Brand | MRCOOL |
| Series | Universal R-454B |
| Model | UHK08 |
| Unit Type | Universal Series Heat Kit |
| Heater Capacity | 8kW |
| Voltage | 208/230V |
| Phase | 1 |
| Cycle | 60 Hz |
| Internal Protection | Circuit Breaker |
| Heater Amps | 28.8/32.0 A |
| MCA | 37.0/42.0 |
| MOP | 40.0/45.0 |
| 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 |
Quick answers to questions about ordering, compatibility, and installation.
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