Description
The MRCOOL Signature Series MCAEAMPSF18C21AA is a 1.5-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 PSC blower motor moves air quietly, and an optional MRCOOL electric heat kit adds supplemental or emergency heat.
The MRCOOL® Signature Series 18k Multi-Position Air Handler delivers dependable, year-round climate control with enhanced energy efficiency thanks to its use of R-454B refrigerant, an eco-friendly upgrade that reduces environmental impact without sacrificing performance.Built for flexibility, this unit supports upflow, downflow, and horizontal configurations, making it an excellent choice for compact installations such as closets, attics, and crawl spaces.
Despite its slim profile, the Signature Series Air Handler provides robust heating and cooling when matched with a compatible heat pump or condenser.Its tough galvanized steel cabinet resists wear and corrosion for long-term durability.
Inside, copper “A” coils with high-efficiency aluminum fins maximize heat transfer and moisture removal, while internal thermal insulation reduces energy waste and condensation.Installation is streamlined with a user-friendly design, saving time and labor costs.
A built-in air filter rack allows for quick filter changes, and an optional electric heat kit is available for enhanced performance in colder climates.Smart home ready, this unit works with most third-party thermostats, giving homeowners control flexibility without requiring proprietary systems.
Backed by a 10-year limited parts warranty, the MRCOOL® Signature Series 18k Multi-Position Air Handler delivers strength, efficiency, and adaptability for powerful, reliable comfort all year long.
Key Features
- Airflow Options: Upflow, downflow, horizontal configurations
- Cabinet: Galvanized steel for durability and corrosion resistance
- Coils: Copper “A” coil with aluminum fins for efficient heat transfer
- Insulation: Internal thermal insulation reduces energy loss and condensation
- Filter: Built-in air filter rack for easy replacement
- Optional Accessory: Electric heat kit available
- Smart Control: Works with most third-party thermostats
Product Specifications
| Blower Motor | PSC, 1/4 HP |
|---|---|
| Rated Airflow | 749 CFM |
| Minimum Circuit Ampacity | 2.1 A |
| Maximum Fuse / Breaker | 3 A |
| Refrigerant Connections | 3/8" liquid, 3/4" suction |
| Sound Level | 53 dB(A) |
| Unit Dimensions (W x H x D) | 19.6" x 45.75" x 22" |
| Unit Weight | 120 lb |
| Brand | MRCOOL |
| Model | MCAEAMPSF18C21AA |
| Series | Signature Series (R-454B) |
| Capacity | 18,000 BTU (1.5 ton) |
| Refrigerant | Compatible with R-454B (low-GWP) |
| Airflow Options | Upflow, downflow, horizontal configurations |
| Cabinet | Galvanized steel for durability and corrosion resistance |
| Coils | Copper “A” coil with aluminum fins for efficient heat transfer |
| Insulation | Internal thermal insulation reduces energy loss and condensation |
| Filter | Built-in air filter rack for easy replacement |
| Optional Accessory | Electric heat kit available |
| Smart Control | Works with most third-party 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.
