Product overview
MRCOOL Signature Series 1.5 Ton 14.3 SEER2 Heat Pump Condenser | MCAESHS4T1821AA
Summary
The MRCOOL® Signature Series 18k Heat Pump Condenser offers efficient, reliable comfort all year long. Rated at 14.3 SEER2 and 11.7 EER2, it delivers dependable heating and cooling while helping lower monthly energy bills. Whether upgrading an old system or installing new, this unit balances performance, efficiency, and value. Pre-charged with eco-friendly R-454B refrigerant, this unit supports reduced environmental impact while maintaining strong performance. The pre-charged design streamlines installation and cuts labor time, making it ideal for both contractors and homeowners. At the heart of the system is a single-speed scroll compressor, engineered for stable, efficient operation. Inner-groove copper tubing enhances heat transfer, boosting responsiveness and energy efficiency. Built-in sensors monitor internal temperature and pressure, helping protect against extreme conditions. An intelligent defrost function keeps the unit running smoothly in cold weather.
Important
AHRI certified - meets industry standards. Register your product to activate warranty coverage. This condenser contains R-454B refrigerant, which is classified as an A2L refrigerant. To comply with safety standards, this unit must be paired with an R-454B air handler or evaporator coil equipped with a leakage detection system. Failure to comply with these requirements may result in safety hazards and could void the warranty.
Key Features
- 18,000 BTU cooling capacity (1.5 Ton)
- 17,000 BTU heating capacity
- 14.3 SEER2 efficiency rating
- 11.7 EER2 efficiency rating
- 7.5 HSPF2 heating efficiency
- Scroll compressor for reliable operation
- Quiet operation (60 dBA)
- Pre-charged with R-454B refrigerant
- Factory pre-charged for 15-foot line set
- Compact design for easy installation
- Built-in protection sensors
- Intelligent defrost function
- AHRI certified
Complete Technical Specifications
| Brand | MRCOOL |
| Series | Signature Series Heat Pump Condenser |
| Model | MCAESHS4T1821AA |
| UPC | 840255595773 |
| GTIN | 00840255595773 |
| Unit Type | Split System Heat Pump Condenser |
| Certifications | UL Listed, CSA Listed, ETL Listed, AHRI Certified |
| Cooling Capacity | 17,000 BTU (1.5 Ton) |
| Heating Capacity | 17,000 BTU |
| Efficiency Ratings | 14.3 SEER2, 11.7 EER2, 7.5 HSPF2 |
| Refrigerant | R-454B (81.1 oz) |
| Electrical | 208/230V 1 Phase 60 Hz |
| Min Circuit Ampacity | 12.2A |
| Max Fuse Breaker | 20A |
| Compressor Type | Scroll |
| Condenser Fan Motor | PSC, 1/9 HP |
| CFM | 1950 |
| Sound Rating | 60 dBA |
| Min Ambient Cooling | 59°F |
| Min Ambient Heating | 5°F |
| Max Lineset Length | 100 ft |
| Liquid Line Size | 3/8" |
| Suction Line Size | 3/4" |
| Net Dimensions (HxWxD) | 25" x 23.6" x 23.6" |
| Net Weight | 144 lbs |
| Shipping Dimensions | 26.2" x 24.8" x 24.8" |
| Shipping Weight | 150 lbs |
Performance Features
| Compatible Equipment | Signature Series Multi-Position or Stud Mount Air Handlers |
| Compressor Technology | Scroll compressor for durability and efficiency |
| Refrigerant | Eco-friendly R-454B with lower global warming potential |
| Noise Reduction | Sound-dampening design for quiet operation (60 dBA) |
| Protection Features | Built-in sensors monitor temperature and pressure |
| Defrost System | Intelligent defrost function for cold weather operation |
Warranty Information
- Registered Warranty: 10 years parts, limited lifetime compressor
- Base Warranty: 10 years parts, limited lifetime compressor
- Registration may be required for full warranty coverage
Manuals & Certifications
Safety Information
PROPOSITION 65 WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
Advanced Technology
The MRCOOL Signature Series 18k Heat Pump Condenser features a durable scroll compressor and energy-efficient design for reliable, quiet operation. The inner-groove copper tubing enhances heat transfer efficiency while the sound-dampening top reduces operational noise to just 60 decibels. Built-in sensors monitor internal temperature and pressure conditions, providing protection against extreme operating environments. The intelligent defrost function ensures optimal performance even in colder temperatures down to 5°F. With its 14.3 SEER2 cooling efficiency and 7.5 HSPF2 heating efficiency, this heat pump condenser delivers powerful performance for year-round comfort in small to medium-sized spaces.
Installation Advantages
This heat pump condenser simplifies installation with its pre-charged R-454B refrigerant system designed for a 15-foot line set. The compact cabinet houses all parts including the 1.5-ton scroll compressor system. The accessible service valves and gauge ports make maintenance straightforward. The unit is designed to work with Signature Series Multi-Position or Stud Mount Air Handlers for complete system compatibility. The durable construction and comprehensive warranty options make this condenser a dependable HVAC solution for residential applications.
In-stock systems ship fast and free with curbside freight delivery, typically arriving in 4–10 days. Please inspect each box at delivery and note any damage on the receipt before signing — it keeps any freight claim quick and simple.
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At a glance
Tech specs
| Power | 230 Volt |
|---|---|
| Line set | 100 Ft |
| Mount type | Ducted |
| Brand | MRCOOL |
Sizing in doubt? Our HVAC experts confirm capacity for your rooms before you order — free. Ask us about utility rebates for high-efficiency heat pumps in your area.
