MRCOOL® Signature Series 7.5kW Electric Heat Kit for Stud-Mount Air Handlers (R-454B) — MCAEHWD7X1AA

Product Description 

The MRCOOL® Signature Series MCAEHWD7X1AA 7.5kW Electric Heat Kit is engineered to deliver stronger auxiliary and emergency heating performance for MRCOOL Signature Series R-454B stud-mount air handlers, making it an excellent upgrade for colder climates, larger zones, or applications requiring added heat capacity.

Designed specifically for between-stud air handler installations, this 7.5kW heat kit integrates seamlessly into compatible MRCOOL stud-mount air handlers without increasing cabinet size or compromising the system’s compact footprint. Once installed, it provides reliable electric resistance heat, supporting the heat pump during extreme cold or serving as dependable backup heat when outdoor temperatures drop below optimal heat-pump operating ranges.

Built to MRCOOL’s OEM specifications, the MCAEHWD7X1AA offers safe, quiet, and efficient operation, ensuring consistent indoor comfort while maintaining system reliability. This heat kit is ideal for homeowners, builders, and contractors who want greater cold-weather performance without sacrificing the clean, space-saving design that makes MRCOOL stud-mount systems ideal for remodels, apartments, multi-family housing, and tight mechanical spaces.

When paired with a compatible MRCOOL Signature Series stud-mount air handler, the 7.5kW heat kit delivers enhanced winter comfort, system flexibility, and peace of mind all season long.

 

KEY FEATURES & BENEFITS 

• 7.5kW Electric Heat Output – Increased auxiliary and emergency heat capacity
• Designed for Stud-Mount Air Handlers – Maintains in-wall, space-saving installation
• Signature Series Compatibility – Built for MRCOOL R-454B systems
• Ideal for Colder Climates – Stronger backup heat performance
• OEM MRCOOL Accessory – Guaranteed fit and system compatibility
• Electric Resistance Heating – Reliable, consistent heat delivery
• Quiet Operation – No added operational noise
• Factory-Matched Integration – Seamless internal installation

 

COMPATIBILITY 

Works With:

• MRCOOL® Signature Series R-454B Stud-Mount Air Handlers

(Compatible with approved 18K, 24K, 30K, and 36K stud-mount air handlers when properly sized.)

 

ELECTRICAL & SYSTEM NOTES

• Heat Output: 7.5kW
• Heating Type: Electric Resistance
• Application: Auxiliary / Emergency Heat
• Refrigerant Compatibility: R-454B systems

⚠️ Important: Proper electrical sizing and professional installation are recommended to ensure safe operation and code compliance.

DIMENSIONS (SHIPPING) 

• Width: 10.38 in
• Height: 9.25 in
• Depth: 14.13 in

 

FREQUENTLY ASKED QUESTIONS  

Q: What’s the difference between the 5kW and 7.5kW heat kits?

A: The 7.5kW kit provides higher heating output, making it better suited for colder climates or larger conditioned spaces.

 

Q: Is this required for all MRCOOL stud-mount systems?

A: No. Heat kits are optional but strongly recommended where backup or auxiliary heat is desired.

 

Q: Will this change the size of my stud-mount air handler?

A: No. The kit installs internally and does not increase cabinet dimensions.

 

Q: Can this be installed by a homeowner?

A: Due to electrical requirements, professional installation is strongly recommended.

 

Q: Is this a genuine MRCOOL part?

A: Yes. This is an OEM MRCOOL Signature Series heat kit.

 

 

 WHY BUY FROM MRCOOL DIRECT 

• ✅ Authorized MRCOOL Dealer
• ✅ Genuine OEM MRCOOL Accessories
• ✅ Guaranteed Compatibility
• ✅ Fast Nationwide Shipping
• ✅ MRCOOL-Focused Product Experts
• ✅ Trusted MRCOOL-Only Online Store