MRCOOL Signature Heat Kit (MHK15H) – 15 kW Electric Heat Strip for Air Handlers With Circuit Breaker

When winter temperatures drop and your heat pump struggles to keep up, having a reliable backup heat source becomes important. The MRCOOL MHK15H is designed to provide that extra support, helping maintain indoor comfort during colder conditions.

Installed inside a compatible air handler, it operates as an electric heat strip that provides supplemental heating when needed. This MRCOOL Signature Series air handler 15 kW heat strip with circuit breaker is designed specifically for use with Signature Series air handler systems. As part of the MRCOOL Signature Series heat kit lineup, it supports safe operation while delivering additional heat when primary systems lose efficiency.

In real-world use, this heat kit helps maintain stable indoor temperatures without requiring major system changes. The built-in circuit breaker simplifies installation, while the field-installed design allows seamless integration with compatible systems.

One customer noted:

“Before installing the unit, rooms felt colder during peak winter. After adding it, the temperature stayed consistent even on the coldest days.”

It helps maintain steady indoor comfort when extra heating support is needed. This heat kit provides a practical way to improve heating performance and keep indoor spaces consistently comfortable.

Product Highlights