Description
MRCOOL Signature 42K BTU 3.5 Ton 14.3 SEER2 Heat Pump Condenser ONLY — MCAESHS4T4221AA
Professional-Grade Central Ducted Heat Pump Condenser with R-454B Refrigerant
The MRCOOL Signature 42K BTU 3.5 Ton Heat Pump Condenser (MCAESHS4T4221AA) is a professional-grade outdoor unit designed for central ducted split system installations. With a 14.3 SEER2 efficiency rating and eco-friendly R-454B refrigerant (low global warming potential), this condenser delivers reliable heating and cooling performance for spaces up to 2100 square feet.
Featuring a heavy-duty scroll compressor, steel louver coil guard, and wire fan discharge grille for component protection, the Signature Heat Pump Condenser pairs with MRCOOL Signature Series Multi-Position Air Handlers for a complete central ducted system. AHRI Certified and ETL Listed for verified performance and safety. The 10-Year Registered Parts Warranty provides long-term peace of mind.
Technical Specifications
| Specification | Value |
|---|---|
| Model / SKU | MCAESHS4T4221AA |
| Series | Signature Series Heat Pump Condenser |
| Type | Condenser ONLY — Central Ducted Heat Pump |
| Cooling Capacity | 42,000 BTU |
| Heating Capacity | 42,000 BTU |
| Tonnage | 3.5 Ton |
| Coverage Area | 1800–2100 sq ft |
| SEER2 Rating | 14.3 |
| EER2 Rating | 11.2 |
| Refrigerant | R-454B (Low-GWP, Eco-Friendly) |
| Voltage | 208-230V / 60Hz / 1-Phase |
| Compressor Type | Scroll |
| Liquid Line | 3/8" |
| Suction Line | 3/4" |
| Net Weight | 195 lbs (88.5 kg) |
| Coil Protection | Steel Louver Coil Guard |
| Certifications | ETL Listed, AHRI Certified |
| Warranty | 10-Year Registered Parts |
Product Tips
- Condenser ONLY: This listing is for the outdoor condenser unit only. A compatible Signature Series Multi-Position Air Handler (sold separately) is required to complete the system.
- R-454B Refrigerant: This unit uses R-454B, a low-GWP refrigerant that is more environmentally friendly than R-410A. Ensure your technician is certified for R-454B handling.
- AHRI Certified Performance: The AHRI certification ensures the stated SEER2 and EER2 ratings are independently verified, giving you confidence in the efficiency claims.
- Professional Installation Required: Central ducted systems require a licensed HVAC technician. Refrigerant handling requires EPA Section 608 certification. DIY installation voids the warranty.
- 10-Year Warranty: Register within 90 days of installation for the full 10-Year Registered Parts Warranty. Keep your AHRI certification number for warranty claims.
Frequently Asked Questions
Compatible Accessories
| Accessory | Purpose |
|---|---|
| Signature Series Multi-Position Air Handler | Matching indoor unit for complete system |
| MRCOOL Central Split System Line Set | Connects outdoor condenser to indoor air handler |
| MRCOOL Condenser Wall Mounting Kit | Secure outdoor condenser mounting |
| Signature Series Heat Kit | Electric heat strip for supplemental heating |
| Standard 24V Thermostat | System control (sold separately) |
Need help selecting the right air handler or accessories?
Contact our HVAC specialists for expert guidance on system configuration, sizing, and installation requirements.
Warranty Information
The MRCOOL Signature Series Heat Pump Condenser is covered by a 10-Year Registered Parts Warranty when properly registered within 90 days of installation by a licensed HVAC contractor. Registration must be completed within 90 days of installation to qualify for the full warranty period.
Extra Information
Brand:
MRCOOL
Series:
Signature Series Heat Pump Condenser
Type:
Condenser ONLY
Cooling Capacity:
42,000 BTU
Heating Capacity:
42,000 BTU
Tonnage:
3.5 Ton
SEER2 Rating:
14.3
EER2 Rating:
11.2
Refrigerant:
R-454B (Low-GWP)
Voltage:
208-230V / 60Hz / 1-Phase
Compressor:
Scroll
Liquid Line:
3/8"
Suction Line:
3/4"
Coverage Area:
1800–2100 sq ft
Net Weight:
195 lbs (88.5 kg)
Certifications:
ETL Listed, AHRI Certified
Warranty:
10-Year Registered Parts
AHRI Certified:
Yes — AHRI Certified
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Heating Capacity:
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SEER2 Rating:
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EER2 Rating:
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Heating Capacity:
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SEER2 Rating:
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Heating Capacity:
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SEER2 Rating:
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AHRI Certified:
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