MRCOOL Signature 48,000 BTU Split System Air Handler Multi-Position

MRCOOL

MRCOOL Signature 48,000 BTU Split System Air Handler Multi-Position

Model: MCAEAMPEF48E21AA SKU: MCAEAMPEF48E21AA

4 Ton  |  R-454B  |  208/230V

  • 4 Ton capacity
  • Uses R-454B refrigerant
  • Runs on 208/230V power
$1,594.76 Free Shipping
In Stock

This listing includes: Indoor air handler only.

Often needed for this install

Browse all accessories →

Sizes and capacities vary between models. Check each part against your unit before ordering, or ask us and we'll confirm the fit.

Talk to a Product Expert
Free shipping on qualifying equipment Manufacturer warranty included Licensed HVAC product support Secure checkout 30-day returns on unused equipment
At a Glance

Key Specifications

System Type Air Handler
Tonnage 4 Ton
Voltage 208/230V · Single Phase
Refrigerant R-454B
Overview

Product Overview

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 cabinet exterior is outfitted with galvanized steel built to withstand wear, along with an interior ECM blower motor that delivers steady airflow while helping reduce energy consumption. The copper “A” coils and aluminum fins provide efficient heat transfer, while thermal insulation along the inside of the cabinet helps reduce condensation accumulation and improve overall system efficiency.

Setup is straightforward, cutting down on 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.

Additional specifications

UPC 840255595896
Series Signature Series Multi-Position Air Handler
Configuration Multi-Position
Airflow (CFM) 1549
Cycle (Hz) 60
Min circuit ampacity (A) 7.2
Max fuse / breaker (A) 10
Blower motor type ECM
Blower motor HP 3/4
Blower speeds 5
Metering device Orifice
Drain connection (in) 3/4
Filter type Replaceable
Filter size 20 * 24 * 1
Mount type Multi-Position
Aux heater included No
Aux heater available Yes
Aux heater sizes (kW) 5kW, 7.5kW, 10kW
AHRI certified Yes
ENERGY STAR certified No
UL listed Yes
ETL listed Yes
Parts warranty (years) 10 Year
Compressor warranty (yrs) Limited Lifetime
Shipping W x H x D (in) 27.75 x 54.89 x 25.2
Shipping weight (lbs) 183

Documents

WARNING: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.p65warnings.ca.gov.

Technical Specifications

Performance

System TypeAir Handler
Tonnage4 Ton
Sound Level57 dBA

Electrical & Fuel

Voltage208/230V
PhaseSingle Phase
RefrigerantR-454B
Connection SizeLiquid 3/8" / Suction 7/8"

Physical & Certifications

Dimensions (W x H x D)22 x 53.125 x 24.5
Weight163 lb
Color / FinishGrey
Shipping & Delivery
Orders typically ship within 1-3 business days. Freight items are delivered by appointment to a curbside address; someone must be present to receive and inspect the shipment. Inspect for damage before signing. Returns are accepted within 30 days on unused, uninstalled equipment in original packaging -- return shipping and a restocking fee may apply. See our Shipping Policy and Return & Refund Policy for full terms.
Manufacturer Warranty

Covered by MRCOOL's limited warranty. Warranty terms are set by MRCOOL and differ by product line — whether registration is required, and whether the installation has to be performed by a state-licensed HVAC contractor, is not the same across the range. In every case coverage depends on the unit being installed according to MRCOOL's instructions and all applicable codes and permits. MRCOOL's warranty document for this model is the controlling source; ask us and we'll send you the one that applies.

Professional Installation Recommended

Most HVAC equipment must be installed and connected by a licensed professional to remain safe, code-compliant, and eligible for manufacturer warranty coverage. If you're unsure about installation requirements, contact us before you order.

Before You Order

Make sure it is the right size, and that you have the rest of it

Most outdoor units ship alone. If you are not certain of the capacity, or of what has to go with this unit, these two will work it out with you.

Still deciding on the right equipment?

Our HVAC specialists can help you confirm sizing and compatibility before you buy.