MRCOOL
MRCOOL Signature 3.5 Ton up to 14.3 SEER2 42,000 BTU Split Air Conditioner
3.5 Ton | SEER2 14.3 | R-454B | 208/230V
- 39000 BTU cooling capacity
- Up to 14.3 SEER2 rated efficiency
- Scroll compressor
- Uses R-454B refrigerant
Key Specifications
Product Overview
The MRCOOL® Signature Series 42k Cooling Only Condenser is built to provide reliable, energy-efficient cooling for homeowners who want dependable performance and lower utility bills. With a 14.3 SEER2 and 11.7 EER2 rating, this system offers consistent comfort while keeping energy consumption in check, making it a great fit for both replacement projects and new installations.
Pre-charged with environmentally friendly R-454B refrigerant, this unit complies with modern environmental regulations while maintaining strong cooling capacity and dependable performance.
At the heart of the system is a durable scroll compressor, engineered to deliver steady, reliable operation over time with minimal wear. To further enhance performance, the unit is equipped with inner-groove copper tubing, which maximizes surface area and significantly improves thermal conductivity and heat transfer efficiency.
Despite its robust output, the system is designed with noise reduction in mind, operating at a low 65 decibels, comparable to the sound of a household dishwasher. A sound-dampening top minimizes operational noise without limiting airflow, making this unit ideal for installation in residential areas where quiet performance is valued. For added durability, it features a steel louver coil guard and wire fan discharge grille, which offer strong protection for critical internal components.
The unit’s compact, lightweight design makes it easy to position in tight spaces, while thoughtful service-friendly features like sweat connection valves and an easy-access gauge port streamline both installation and ongoing maintenance. To top it off, MRCOOL® offers a 10-year limited parts warranty and a limited lifetime compressor warranty, offering dependable protection and lasting value.
Additional specifications
| UPC | 840255595957 |
|---|---|
| Series | Signature Series Air Conditioner Condenser |
| Refrigerant charge (oz) | 114.6 |
| Airflow (CFM) | 2950 |
| Cycle (Hz) | 60 |
| Min circuit ampacity (A) | 26 |
| Max fuse / breaker (A) | 45 |
| Inverter | No |
| Max line set length (ft) | 150 |
| Min ambient cooling (F) | 59 |
| AHRI certified | Yes |
| ENERGY STAR certified | No |
| UL listed | Yes |
| ETL listed | Yes |
| Parts warranty (years) | 10 Year |
| Compressor warranty (yrs) | Limited Lifetime |
| Shipping W x H x D (in) | 30.3 x 34.8 x 30.3 |
| Shipping weight (lbs) | 195 |
Documents
- Installation manual (PDF)
- Brochure (PDF)
- Warranty (PDF)
- AHRI certificate (PDF)
- EnergyGuide label (PDF)
WARNING: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.p65warnings.ca.gov.
Technical Specifications
Performance
| System Type | Split System AC Condenser |
|---|---|
| Capacity | 39000 BTU |
| Tonnage | 3.5 Ton |
| Compressor / Stages | Scroll |
| SEER2 | 14.3 |
| EER2 | 11.7 |
| Sound Level | 65 dBA |
Electrical & Fuel
| Voltage | 208/230V |
|---|---|
| Phase | Single Phase |
| Refrigerant | R-454B |
| Connection Size | Liquid 3/8" / Suction 3/4" |
Physical & Certifications
| Dimensions (W x H x D) | 29.14 x 32.875 x 29.14 |
|---|---|
| Weight | 185 lb |
| Color / Finish | Grey |
Shipping & Delivery
Manufacturer Warranty
Covered by MRCOOL's limited warranty. Warranty terms are set by MRCOOL and differ by product line — whether registration is required, and whether the installation has to be performed by a state-licensed HVAC contractor, is not the same across the range. In every case coverage depends on the unit being installed according to MRCOOL's instructions and all applicable codes and permits. MRCOOL's warranty document for this model is the controlling source; ask us and we'll send you the one that applies.
Professional Installation Recommended
Most HVAC equipment must be installed and connected by a licensed professional to remain safe, code-compliant, and eligible for manufacturer warranty coverage. If you're unsure about installation requirements, contact us before you order.
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