Description
The MRCOOL Signature Series MCAEAMPEF36C21AA is a 3-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 36k Multi-Position Air Handler delivers dependable, energy-efficient comfort in any season. With the addition of environmentally friendly R-454B refrigerant, this system supports cleaner standards while helping to lower energy costs and reduce your home's carbon footprint.
Designed for flexibility and space efficiency, the unit can be installed in upflow, downflow, or horizontal positions, making it an ideal choice to accommodate a wide variety of residential layouts. Its compact, modern design allows it to fit easily into tight areas like attics, closets, or crawl spaces without sacrificing performance. When paired with a compatible heat pump or condenser, it provides powerful, year-round heating and cooling.
The air handler features a durable galvanized steel cabinet, a high-efficiency ECM blower motor, and copper “A” coils with enhanced aluminum fins for optimized heat transfer and humidity control. Internal thermal insulation minimizes energy loss and condensation, improving both comfort and efficiency. Installation is straightforward and designed to reduce labor time and complexity.
A built-in air filter rack makes maintenance quick and convenient, while an optional electric heat kit enhances performance in colder climates. For smart home convenience, this unit works seamlessly with most third-party thermostats, giving you the freedom to choose how you control your comfort without being locked into a specific brand.
Key Features
- Configuration: Multi-position (upflow, downflow, horizontal)
- Design: Compact and modern — fits in attics, closets, or crawlspaces
- Cabinet: Durable galvanized steel construction
- Blower Motor: High-efficiency ECM
- Coil: Copper “A” coils with enhanced aluminum fins for heat transfer & humidity control
- Insulation: Internal thermal insulation reduces energy loss, condensation & noise
- Filter: Built-in filter rack for easy maintenance
Product Specifications
| Blower Motor | ECM, 1/2 HP |
|---|---|
| Rated Airflow | 1131 CFM |
| Minimum Circuit Ampacity | 4.5 A |
| Maximum Fuse / Breaker | 6 A |
| Refrigerant Connections | 3/8" liquid, 3/4" suction |
| Sound Level | 55 dB(A) |
| Unit Dimensions (W x H x D) | 19.6" x 45.75" x 22" |
| Unit Weight | 129 lb |
| Brand | MRCOOL |
| Model | MCAEAMPEF36C21AA |
| Series | Signature Series (R-454B) |
| Capacity | 36k (≈3 ton) |
| Refrigerant | R-454B (eco-friendly, lower carbon footprint) |
| Configuration | Multi-position (upflow, downflow, horizontal) |
| Design | Compact and modern — fits in attics, closets, or crawlspaces |
| Cabinet | Durable galvanized steel construction |
| Blower Motor | High-efficiency ECM |
| Coil | Copper “A” coils with enhanced aluminum fins for heat transfer & humidity control |
| Insulation | Internal thermal insulation reduces energy loss, condensation & noise |
| Filter | Built-in filter rack for easy maintenance |
| Heat Option | Compatible with optional electric heat kit for colder climates |
| Thermostat Compatibility | Works with most third-party thermostats (smart home ready) |
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.
