MRCOOL® Universal Series 4–5 Ton DC Inverter Condenser – Up to 18 SEER | Ultra-Heat Technology
MODEL: MDUO18048060
Product Description
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:
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4–5 Ton MRCOOL® Universal DC Inverter Condenser
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Factory Pre-Charged with R-410A Refrigerant
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Integrated Inverter Rotary Compressor
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Installation Manual
- Warranty Documentation
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 & Manuals
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.
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Deliveries are made to the curbside — please arrange assistance for heavy or large items, as drivers do not carry items indoors or upstairs.
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Tracking details will be sent within 3–5 business days after placing your order.
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Freight shipments are scheduled directly by the carrier using the contact information you provide at checkout.
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Please inspect your shipment upon delivery and report any visible damage on the delivery receipt.
👉 Click here for our full Shipping Policy
Return Policy
We want you to love your purchase from Cool Heat Direct. If you need to return an item:
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Contact us within 30 days of delivery.
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Items must be unused, uninstalled, and in their original packaging.
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A 35% restocking fee applies to all approved returns.
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Accessories such as line sets, wall mounts, and couplers are non-returnable.
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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.
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