Description
The MRCOOL Signature Series MCAEAMPEF48E21AA is a 4-ton multi-position air handler for R-454B split systems, matched with Signature Series heat pump and air conditioner condensers for AHRI-rated performance. It installs upflow, downflow or horizontal to fit closets, attics and crawlspaces. An ECM blower motor moves air quietly, and an optional MRCOOL electric heat kit adds supplemental or emergency heat.
The MRCOOL® Signature Series 48k Multi-Position Air Handler is a powerful and flexible solution for year-round home comfort. Engineered for performance and efficiency, this system works with R-454B refrigerant, offering a more environmentally friendly option that meets modern energy standards without compromising reliability.
Designed to adapt to your space, this air handler supports upflow, downflow, and horizontal installations, making it an ideal fit for a wide range of home layouts. When you’re dealing with limited space, its compact and streamlined design makes installation easy without sacrificing capacity. The galvanized steel cabinet exterior is built to withstand wear, while the ECM blower motor delivers steady airflow and helps reduce energy consumption.
The copper “A” coils with aluminum fins provide efficient heat transfer, while thermal insulation inside the cabinet reduces condensation accumulation and improves overall efficiency. Setup is straightforward, minimizing labor time and cost. Maintenance is just as simple thanks to the air filter rack, and an optional electric heat kit is available for enhanced heating in colder regions.
For added convenience, this system pairs effortlessly with most third-party smart thermostats, giving you full control over your comfort without being tied to a specific platform. Backed by a 10-year limited parts warranty, the MRCOOL® Signature Series 48k Multi-Position Air Handler delivers reliable, efficient comfort season after season.
Key Features
- Configuration: Multi-position (upflow, downflow, horizontal)
- Design: Compact and streamlined for easy installation in tight spaces
- Cabinet: Durable galvanized steel exterior
- Blower Motor: High-efficiency ECM
- Coil: Copper “A” coils with aluminum fins for effective heat transfer
- Insulation: Internal thermal insulation reduces condensation, energy loss & noise
- Filter: Built-in air filter rack for quick maintenance
Product Specifications
| Blower Motor | ECM, 3/4 HP |
|---|---|
| Rated Airflow | 1549 CFM |
| Minimum Circuit Ampacity | 7.2 A |
| Maximum Fuse / Breaker | 10 A |
| Refrigerant Connections | 3/8" liquid, 7/8" suction |
| Sound Level | 57 dB(A) |
| Unit Dimensions (W x H x D) | 22" x 53.12" x 24.5" |
| Unit Weight | 163 lb |
| Brand | MRCOOL |
| Model | MCAEAMPEF48E21AA |
| Series | Signature Series (R-454B) |
| Capacity | 48k (≈4 ton) |
| Refrigerant | R-454B (eco-friendly, modern standard) |
| Configuration | Multi-position (upflow, downflow, horizontal) |
| Design | Compact and streamlined for easy installation in tight spaces |
| Cabinet | Durable galvanized steel exterior |
| Blower Motor | High-efficiency ECM |
| Coil | Copper “A” coils with aluminum fins for effective heat transfer |
| Insulation | Internal thermal insulation reduces condensation, energy loss & noise |
| Filter | Built-in air filter rack for quick maintenance |
| Heat Option | Compatible with optional electric heat kit for colder climates |
| Thermostat Compatibility | Works with most third-party smart thermostats |
Compatibility & Installation
- Matched system: Pairs with Signature Series R-454B heat pump (MCAESHS4T) and air conditioner (MCAESAS4T) condensers of the same tonnage.
- Line set: Sweat (brazed) connections; line set not included.
- Professional installation: Must be installed by a licensed HVAC contractor; R-454B is an A2L refrigerant.
