Description
This MRCOOL Signature Series 3.5-ton air conditioner split system pairs the MCAESAS4T4221AA R-454B air conditioner condenser with the MCAEAMPEF42C21AA multi-position air handler (ECM blower). The combination is AHRI certified (AHRI #217513221) at 14.3 SEER2 and 11.7 EER2, delivering 39,000 BTU/h of rated cooling. It is a straightforward, efficient replacement for an older R-410A split system.
What's Included
- 1 × MCAESAS4T4221AA — Signature Series 3.5 Ton R-454B air conditioner condenser
- 1 × MCAEAMPEF42C21AA — Signature Series 3.5 Ton multi-position air handler, ECM motor
System Performance
| AHRI Reference Number | 217513221 |
|---|---|
| Cooling Capacity | 39,000 BTU/h |
| SEER2 | 14.3 |
| EER2 | 11.7 |
| Refrigerant | R-454B |
| Power Supply | 208/230V, 1-Phase, 60 Hz |
Component Specifications
Air Conditioner Condenser — MCAESAS4T4221AA
| Minimum Circuit Ampacity | 26 A |
|---|---|
| Maximum Fuse / Breaker | 45 A |
| Refrigerant Connections | 3/8" liquid, 3/4" suction |
| Sound Level | 65 dB(A) |
| Unit Dimensions (W x H x D) | 29.14" x 32.8" x 29.14" |
| Unit Weight | 185 lb |
| Cooling Capacity | 42k BTU |
| Efficiency Ratings | 14.3 SEER2 / 11.7 EER2 |
| Refrigerant | Pre-charged R-454B |
| Compressor | Scroll |
| Tubing | Inner-groove copper |
| Noise Level | 65 dB with sound-dampening top |
| Durability Features | Steel louver coil guard, wire fan discharge grille |
| Service Features | Sweat connection valves, easy-access gauge port |
| Design | Compact and lightweight for flexible placement |
Multi-Position Air Handler — MCAEAMPEF42C21AA
| Blower Motor | ECM, 3/4 HP |
|---|---|
| Rated Airflow | 1254 CFM |
| Minimum Circuit Ampacity | 7.2 A |
| Maximum Fuse / Breaker | 10 A |
| Unit Dimensions (W x H x D) | 19.6" x 45.75" x 22" |
| Unit Weight | 131 lb |
| Capacity | 42k (≈3.5 ton) |
| Refrigerant | R-454B (low-GWP, eco-friendly) |
| Configuration | Multi-position (upflow, downflow, horizontal) |
| Design | Slim, space-saving profile for attics, closets, or crawlspaces |
| Cabinet | Durable galvanized steel construction |
| Blower Motor | High-efficiency ECM |
| Coil | Copper “A” coils with enhanced aluminum fins for superior heat transfer & humidity control |
| Insulation | Internal thermal insulation reduces energy loss, condensation & noise |
| Filter | Built-in filter rack for easy maintenance |
| Heat Option | Optional electric heat kit for colder climates |
| Thermostat Compatibility | Works with most third-party thermostats (smart home ready) |
Compatibility & Installation
- Electric heat: Add a Signature Series R-454B heat kit (5–15 kW) using the "Add an Electric Heat Strip" option above.
- Line set: Sweat connections, 3/8" liquid / 3/4" suction; line set not included.
- Thermostat: Standard 24V thermostat (not included).
- Professional installation: Licensed HVAC contractor required; R-454B is an A2L refrigerant.
