MRCOOL® Universal Series 4–5 Ton DC Inverter Condenser – Up to 18 SEER | Ultra-Heat Technology

MODEL: MDUO18048060

Powerful, Energy-Efficient Climate Control with Universal Compatibility

Engineered for year-round comfort and significant energy savings, the MRCOOL® Universal Series 4–5 Ton DC Inverter Heat Pump Condenser is your high-capacity solution for larger homes and light commercial settings. With an impressive SEER rating of up to 18 and a variable-speed inverter compressor, this condenser delivers fast, quiet, and efficient heating and cooling—even in extreme outdoor conditions as low as -22°F.

Its slim, compact footprint makes it ideal for tight spaces and zero lot line installations, and its compatibility with virtually any third-party air handler or thermostat (including Wi-Fi-enabled models) offers unmatched flexibility.

The MDUO18048060 system features a smart ultra-heat inverter design that eliminates the need for a gas furnace, while still providing reliable warmth in harsh winters. Perfect for modern retrofits and upgrades, this condenser comes factory-charged and ready to integrate seamlessly with your existing or new system.

Why You’ll Love It

✅ Ultra-Heat Inverter Technology – Delivers reliable performance from -22°F to 129°F

✅ Efficient 4–5 Ton Output – Up to 18 SEER & 9 HSPF2 for lower utility bills

✅ Flexible Air Handler Pairing – Works with most 4T–5T air handlers and smart thermostats

✅ Whisper-Quiet Operation – Internal fan blade design reduces dB levels during use

✅ Slim Profile Design – Ideal for tight installations and zero lot line properties

✅ Pre-Charged & Ready – Saves time and cost during setup

✅ Smart Compatibility – Works with Wi-Fi and Nest-style thermostats

✅ ETL, AHRI, and Energy Star Certified – Meets top-tier performance standards

✅ No Gas Furnace Needed – Fully electric solution for eco-conscious homeowners

✅ 10-Year Registered Warranty – On compressor and parts for peace of mind

What’s Included:

• 4–5 Ton MRCOOL® Universal DC Inverter Condenser 

• Factory Pre-Charged with R-410A Refrigerant

• Integrated Inverter Rotary Compressor

• Installation Manual

• Warranty Documentation

Specifications

Specifications at a Glance

Attribute	Details
SEER (up to)	18
SEER2	17
EER / EER2	11 / 11
HSPF / HSPF2	10.5 / 9
Tonnage	4–5 Ton
Cooling Capacity	48,000 BTU
Heating Capacity	48,000 BTU
Voltage / Phase / Cycle	208–230V / 1 Phase / 60 Hz
Max Fuse Breaker	45A
Min Circuit Ampacity	35A
Inverter	DC Inverter Rotary
Decibel Rating	58 dB(A)
Refrigerant Type	R-410A
Refrigerant Volume	220.48 oz
Operating Range (Cooling)	5°F – 129.2°F
Operating Range (Heating)	-22°F – 75.2°F
Line Set Length (Max)	164 ft / 5 bends
Liquid/Suction Line Size	3/8" & 3/4"
Certifications	ETL, AHRI, Energy Star
Warranty (Registered)	10-Year Compressor & Parts

Room Size & BTU Coverage Guide (Universal Series)

BTU Rating	Tonnage	Recommended Room Size
18,000 BTU	1.5 Ton	600 – 900 sq. ft.
24,000 BTU	2 Ton	800 – 1,200 sq. ft.
36,000 BTU	3 Ton	1,200 – 1,500 sq. ft.
48,000 BTU	4 Ton	1,500 – 2,000 sq. ft.
60,000 BTU	5 Ton	2,000 – 2,500+ sq. ft. (open concept)

💡 Based on 8 ft ceilings, good insulation, and average sun exposure. Size up for rooms with high ceilings, large windows, or poor insulation.

Installation

Installation & Manuals 

Product Brochure

Installation Manual

Performance Data 

Warranty Document

AHRI Certificate

Shipping & Returns

Shipping Policy 

At Cool Heat Direct, we offer free curbside delivery on all MRCOOL product orders via FedEx Ground, FedEx Freight, or trusted carriers depending on order size.

• Deliveries are made to the curbside — please arrange assistance for heavy or large items, as drivers do not carry items indoors or upstairs.

• Tracking details will be sent within 3–5 business days after placing your order.

• Freight shipments are scheduled directly by the carrier using the contact information you provide at checkout.

• Please inspect your shipment upon delivery and report any visible damage on the delivery receipt.

Return Policy 

We want you to love your purchase from Cool Heat Direct. If you need to return an item:

• Contact us within 30 days of delivery.

• Items must be unused, uninstalled, and in their original packaging.

• A 35% restocking fee applies to all approved returns.

• Accessories such as line sets, wall mounts, and couplers are non-returnable.

• Return shipping is the customer’s responsibility unless the item is damaged or defective on arrival.

To start a return, please email us at support@coolheatdirect.com with your order number and reason for return.