4 Ton 18 SEER MRCOOL Universal Series Heat Pump System

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AHRI Number:205756413

Suggested Retail $4,447.50 As low as Special Price $3,728.00
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Configuration: Horizontal

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The MRCOOL Universal Unitary Heat Pump system is an easy to install, full size air handler with a slim condenser, suitable for most 4-5 ton applications. This system is incredibly flexible, combining the ultimate in ducted comfort and easy installation. The 5 ton condenser can be field converted to a 4 ton with a different dip switch setting. The quick connect fittings on the condenser and air handler allow for an easy installation processes with MRCOOL's pre-charged lines, available as an accessory up to 50 feet in length. Using the same inverter technology used by the MRCOOL mini splits, the system can run at different speeds to optimize comfort and efficiency.


  • Comes with quick connect fittings for easy installations
  • 4 ton or 5 ton setting
  • 80% BTU output at -4°F oudside temperature
  • Fireproof electrical box
  • Upflow and horizontal installation only


  • No gas required; all electric system
  • Compatible with 3rd party thermostats; use your favorite or upgrade to a smart thermostat
  • No specialized tools required for installing the line sets
  • MRCOOL temperature compensation technology helps keep you comfortable in any weather condition

MDU18048060 System

  • MDUI18048 Indoor Unit
  • MDUO18048 Outdoor Unit
Product Specifications
More Information
4 Ton 18 SEER MRCOOL Universal Series Heat Pump System
Weight (in lbs) 555.300000
AHRI Certificate Number 205756413
Manufacturer MRCOOL
Controller Not Included
HSPF 10.5
Cooling BTU 48,000 BTU
Heating BTU 48,000 BTU
Maximum CFM 1600
Decibel Level (dBA) Indoor Unit: 50 | Outdoor Unit: 64
Electric Heat Heat Pump
Electric Backup Heat Capabilities (Optional) 15 Kilowatts, 20 Kilowatts
Energy Star Yes
Refrigerant R410A
System SEER 18+
EER 11
Condenser Stages Variable Speed
Compressor Type Rotary
Liquid Line 3/8"
Suction Line 3/4"
Electrical 230 V. 1 Phase 60 Hz
Max Breaker Size Indoor Unit: 15A | Outdoor Unit: 45A
Min. Breaker Size Indoor Unit: 4A | Outdoor Unit: 35A
Tonnage 4 Ton
System Tonnage 4 Ton
Min/Max Outdoor Temp for Heating -22°F-75°F
Min/Max Outdoor Temp for Cooling 5°F-129°F
Zone Compatibility Single Zone
Height Indoor Unit: 57" | Outdoor Unit: 53-3/4"
Width Indoor Unit: 24-3/4" | Outdoor Unit: 42-3/4"
Depth Indoor Unit: 21-1/4" | Outdoor Unit: 14-1/2""
Additional Info Indoor Unit: 202 lbs | Outdoor Unit: 308 lbs
Warranty 10 Years with Online Registration
Resources You will need Adobe® Acrobat® Reader to view PDF documents.
Safety Information PROPOSITION 65 WARNING
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Customer Questions
Trunk line size
The Sizing Guidetowards the bottom of our page will help you determine the right size for your home. For Duct Sizing please check our website as well. If you are still unsure, please give us a call and one of our experts will assist you in finding...
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Why Choose MRCOOL?

MRCOOL Heating and Cooling Solutions are the cutting edge of what modern, flexible fabrication can produce. These systems rely on state-of-the-art manufacturing processes and advanced design to deliver high efficiency air comfort anywhere you need it.

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