Other Products ｜MRCOOL® Signature 4 Ton 48K BTU Split System Multi-Position Air Handler, MCAEAMPEF48E21AA

Product Description 
 
MRCOOL® Signature Series 48K Multi-Position Air Handler (230V)
The MRCOOL® Signature Series 48K Multi-Position Air Handler is designed for homeowners and installers who need strong airflow, efficient performance, and flexible installation options in a 4-ton split-system application. Built to pair seamlessly with MRCOOL® Signature Series top-discharge air conditioners and heat pump condensers, this unit supports upflow, downflow, and horizontal installations, making it ideal for both new construction and retrofit projects.
This air handler features a high-efficiency ECM blower motor, delivering smooth, consistent airflow while reducing electrical consumption compared to traditional PSC motors. When matched with a compatible condenser or heat pump, the system provides dependable year-round comfort with improved humidity control and quieter operation.
The cabinet is constructed from heavy-gauge galvanized steel for long-term durability and corrosion resistance. Inside, copper “A” coils paired with enhanced aluminum fins maximize heat transfer and moisture removal, helping the system maintain steady temperatures throughout the home. Internal thermal insulation reduces condensation and sound transmission, keeping operation quiet at just 57 dBA, even under higher demand.
Installation is streamlined thanks to an installer-friendly layout that reduces labor time and simplifies service access. A built-in filter rack allows for quick maintenance, while support for optional electric heat kits adds supplemental heating capability in colder regions. The system is also compatible with most third-party smart thermostats, giving homeowners control flexibility without proprietary restrictions.
Backed by a 10-year limited parts warranty, the MRCOOL® Signature Series 48K Multi-Position Air Handler delivers dependable airflow, efficient operation, and long-term reliability for larger residential HVAC systems.
 
SYSTEM COMPATIBILITY 
✔ MRCOOL® Signature Series top-discharge AC condensers
✔ MRCOOL® Signature Series heat pump condensers
✔ Split-system HVAC applications
✔ Optional electric heat kits. Compatible heat kits listed below. 
1. 5kW,       Model- MCAEHFD5X1AA
2. 7.5kW,    Model- MCAEHFD7X1AA
3. 10kW,     Model- MCAEHWD10X1AA
✔ R-454B refrigerant systems
 
TECHNICAL SPECIFICATIONS  
Brand: MRCOOL
Series: Signature Series
Model: MCAEAMPEF48E21AA
Unit Type: Air Handler
Mount Type: Multi-Position
 
Capacity: 48,000 BTU
Tonnage: 4 Ton
Airflow: 1,549 CFM
 
Voltage: 208/230V
Phase: 1
Frequency: 60 Hz
Max Breaker: 10A
Min Circuit Ampacity: 7.2A
 
Refrigerant Type: R-454B
Liquid Line: 3/8”
Suction Line: 7/8”
Drain Connection: 3/4”
 
Blower Motor Type: ECM
Blower Motor HP: 3/4 HP
Blower Speeds: 5
Blower RPM: 1,010
Sound Rating: 57 dBA
 
Filter Type: Replaceable
Filter Size: 20 × 24 × 1
 
Metering Device: Orifice
 
Auxiliary Heat Included: No
Auxiliary Heat Available: Yes
Aux Heat Sizes: 5kW, 7.5kW, 10kW
 
Certifications: AHRI, UL, CSA, ETL
ENERGY STAR®: No
 
Warranty:
• 10-Year Limited Parts Warranty
 
DIMENSIONS & WEIGHT
Net Dimensions:
• Width: 22”
• Depth: 24.5”
• Height: 53.125”
Net Weight: 163 lbs
Shipping Dimensions:
• Width: 27.75”
• Depth: 25.2”
• Height: 54.89”
Shipping Weight: 183 lbs
 
 
Frequently Asked Questions 
What condensers work with this air handler?
It pairs with MRCOOL Signature Series top-discharge AC and heat pump condensers.

Is this a variable-speed air handler?
Yes. It uses a high-efficiency ECM blower motor with 5 speeds.

Can this unit be installed horizontally?
Yes. It supports upflow, downflow, and horizontal installations.

Does it support R-454B refrigerant systems?
Yes. It is fully designed for R-454B compatibility.

Can auxiliary heat be added?
Yes. Optional 5kW, 7.5kW, and 10kW electric heat kits are supported.
 
 
Why Buy From MRCOOL DIRECT?
When you order from MRCOOL Direct, you get:

✅ Authorized MRCOOL® dealer – Your warranty is protected
✅ Factory-fresh units – No refurbished or mystery sources
✅ Fast U.S. shipping – Most in-stock items ship in 1–3 business days
✅ Financing options – Make high-efficiency comfort more affordable
✅ Real product support – Help with sizing, line set selection, and DIY questions
✅ No third-party marketplace middlemen – Just genuine MRCOOL® systems from a trusted MRCOOL® dealer.

BUY DIRECT!
Feel Free to call us anytime. Family Friendly help just a dial away. We love talking HVAC615-553-8118
Family owned & USAs #1 MRCOOL® Authentication Dealer.
 
Brand:MRCOOL®Category:AIR HANDLERSKU:MCAEAMPEF48E21AATags:230V Air Handler, 4 Ton Air Handler, 48K Air Handler, Air Handler, ECM Blower, Indoor Unit, MCAEAMPEF48E21AA, MRCOOL, Multi-Position Air Handler, R-454B, Residential HVAC, Signature Series