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Send us your indoor unit model number, serial number, and photos of the existing part before ordering. This helps us verify compatibility and reduce the chance of ordering the wrong replacement part.
Final Sale: MRCOOL Accessories are non-returnable.
Contact a representative if you need assistance with finding the right HVAC Accessory.
| Dimensions | 2.6" D x 12" H x 19" W |
| Voltage | 240 V |
| Max Fuse Breaker | 60&60 A |
| Min Circuit Ampacity | 40 A |
| Rated Load | 15 |
| Auxiliary Heater Sizes | 15 KW |
| UL Listed | yes |
| Install Manual |
No confirmed fitment models have been added yet. Verify compatibility before ordering.
| Brand | MRCOOL |
|---|---|
| MRCOOL® Part Number | PHK15H |
No common symptom information has been added for this part type yet.
This replacement part should be installed by a qualified technician or a capable installer familiar with mini split service procedures. Always disconnect power before servicing HVAC equipment.
No Q&A content has been added for this replacement part yet.
HEAT STRIP SIZING & PERFORMANCE
The correct electric heat strip size depends on more than air handler tonnage. Climate, home insulation, electrical capacity, system design, and heating demands all affect which heat kit is appropriate for your HVAC system.
Homes in colder climates often require larger auxiliary heat capacity because heat pumps lose efficiency as outdoor temperatures fall
Northern climates may benefit from larger backup heat kits than mild-weather regions.
Heat strips draw significant electrical current. Your panel capacity, breaker size, and wiring must support the selected heat kit.
Always verify electrical requirements before upgrading to a larger kW heat strip.
Poor insulation increases heat loss and can increase demand on both the heat pump and electric backup heat system.
Improving insulation may reduce heating costs more than increasing heat strip size.
Larger homes generally require more heating capacity, but square footage alone should not determine heat strip selection.
Heat load calculations are more accurate than simple square-foot estimates.
Drafty homes, large entryways, and poorly sealed structures can dramatically increase heating demand.
Air sealing improvements can significantly improve HVAC performance.
Heat strips are not universal. Each air handler has specific approved heat kit sizes and electrical configurations.
Always verify your air handler model number before ordering a heat strip.
Heat strips provide auxiliary and emergency heat when additional heating capacity is needed. Choosing the correct heat kit requires verifying air handler compatibility, electrical requirements, climate conditions, and manufacturer specifications.