MRCOOL Signature Series 3.5 Ton 42K BTU 14.3 SEER2 R-454B Heat Pump Condenser 208/230V MCAESHS4T4221AA

The MRCOOL® Signature Series 42k Heat Pump Condenser is a powerful, energy-efficient solution designed to keep your home comfortable all year. With performance ratings of 14.3 SEER2 and 11.7 EER2, it delivers reliable heating and cooling while helping reduce overall energy use and utility bills. Whether you’re facing summer heat or winter chill, this system is built to perform.

Pre-charged with R-454B refrigerant, this model supports modern environmental standards with a lower global warming potential than older refrigerants. The pre-charged design also speeds up installation and reduces labor costs, making it a smart choice for contractors and homeowners alike.

At its core, a single-speed scroll compressor ensures steady, long-lasting performance. Enhanced with inner-groove copper tubing, the system provides faster, more efficient heat transfer. Built-in temperature and pressure sensors offer real-time system monitoring and protection, while an intelligent defrost function prevents frost buildup for smooth operation in cold conditions.

Operating at just 65 decibels, the unit stays quiet enough for residential use, aided by a sound-dampening top. Durability features include a steel louver coil guard, and a wire fan grille, the best for protecting internal components.

The compact design allows flexible installation, and accessible service ports simplify maintenance. Backed by a 10-year limited parts warranty and a limited lifetime compressor guarantee, the MRCOOL® Signature Series 42k Heat Pump Condenser offers lasting comfort and confidence.

Technical Specifications

Certifications

• UL Listed
• CSA Listed
• ETL Listed
• AHRI Certified

Warranty

• 10 Year Parts Warranty
• Limited Lifetime Compressor Warranty

Product Documentation

• MRCOOL Signature Series HP Condenser 3.5T Installation Manual (PDF)
• MRCOOL Signature Series HP Condenser 3.5T Warranty Document (PDF)
• MRCOOL Signature Series HP Condenser 3.5T Brochure (PDF)
• MRCOOL Signature Series HP Condenser 3.5T AHRI Certification (PDF)
• MRCOOL Signature Series HP Condenser 3.5T Energy Guide (PDF)

WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.