What's in the box
- 1 × MRCOOL® Universal® 36K BTU 3 Ton Packaged Heat Pump
- Installation Documentation
- Professional installation is recommended. The MRCOOL® Universal® Packaged Heat Pump is designed for residential and light commercial applications and supports horizontal, upflow, and downflow configurations. Proper electrical connections, ductwork, airflow setup, and local code compliance are essential for optimal performance and warranty coverage.
- The system ships as a complete outdoor packaged unit, helping simplify installation compared to traditional split-system configurations.
Compatible Auxiliary Heat Kits (Sold Separately):
- 6kW Heat Kit
- 9kW Heat Kit
- 12kW Heat Kit
Always refer to the installation manual and local building codes before installation.
• 10-Year Parts Warranty
• 10-Year Labor Warranty
Please refer to the Warranty Documentation for full warranty terms, registration requirements, and coverage details.
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Free shipping available.
Orders ship from U.S. warehouse locations. Delivery times may vary by product availability, destination, and freight carrier scheduling.Returns must follow Cool Heat Direct’s return policy and the product must meet return eligibility requirements.
Manuals & documents
MODEL: MDPH18036D
Efficient Whole-Home Comfort. Built for Every Season.
Looking for reliable heating and cooling that delivers year-round comfort while helping reduce energy costs?
The MRCOOL® Universal® 36K BTU 3 Ton Packaged Heat Pump combines advanced inverter technology, impressive energy efficiency, and all-in-one convenience in a single outdoor unit designed for dependable whole-home comfort.
Ideal for homes between 1,400–1,700 sq ft, this packaged heat pump continuously adjusts its output to match changing indoor conditions. Unlike traditional systems that cycle on and off repeatedly, the inverter-driven compressor operates at variable speeds to maintain more consistent temperatures, quieter performance, improved efficiency, and reduced energy consumption.
With an impressive 18 SEER2 efficiency rating, reliable heating in temperatures as low as -22°F, and cooling performance in conditions up to 125°F, this system is engineered to perform in virtually any climate.
The use of environmentally friendly R-32 refrigerant helps reduce environmental impact while supporting modern efficiency standards. Flexible installation options, including horizontal, upflow, and downflow applications, make this system an excellent choice for both replacement projects and new construction.
Whether you're upgrading an older HVAC system or building a new home, the Universal® 36K delivers dependable comfort, lower utility bills, and long-term peace of mind.
One system. One installation. Year-round comfort.
Why You’ll Love It
✅Ideal for homes between 1,400–1,700 sq ft
✅High-efficiency 18 SEER2 performance
✅ Variable-speed DC inverter technology
✅ Heating performance down to -22°F
✅ Cooling operation up to 125°F
✅ All-in-one packaged heat pump design
✅ Environmentally friendly R-32 refrigerant
✅ Flexible horizontal, upflow, or downflow installation
✅ Energy Star® Cold Climate Certified
✅ Industry-leading 10-Year Parts & Labor Warranty
Best For
Medium Homes • Whole Home Comfort • New Construction • Replacement Systems • Open Floor Plans • Cold Climate Regions
| Coverage Area | 1,400–1,700 sq ft |
| Capacity | 36K BTU |
| Tonnage | 3 Ton |
| Cooling Capacity | 34,000 BTU |
| Heating Capacity | 34,000 BTU |
| SEER2 | 18 |
| EER2 | 11.2 |
| HSPF2 | 8.5 |
| Voltage | 208/230V |
| Phase | Single Phase |
| Refrigerant | R-32 |
| Inverter Technology | Yes |
| Heating Operation | Down to -22°F |
| Cooling Operation | Up to 125°F |
| Sound Level | 63 dBA |
| Auxiliary Heat Compatible | Yes |
| Auxiliary Heat Sizes | 6kW, 9kW, 12kW |
| Warranty | 10-Year Parts & Labor |
Questions, answered
Everything homeowners ask before buying a MRCOOL® system.
Installation
Do I need an HVAC technician to install this?
No. MRCOOL® DIY systems are designed for homeowner installation. The pre-charged Quick Connect® line set means there's no refrigerant handling, no vacuum pump, and no special tools or license required.
How long does installation take?
Most single-zone systems go in within a few hours: mount the indoor air handler, set the outdoor condenser, connect the pre-charged line set, and power it on.
Do I need an electrician?
The system needs a dedicated circuit. Most homeowners have a licensed electrician add the breaker and disconnect — everything else you can do yourself.
Sizing & compatibility
What BTU size do I need?
As a rule of thumb: up to 400 sq ft → 9–12K BTU, 400–600 sq ft → 12–18K, 600–1,000 sq ft → 18–24K. Use the room-size guide above and factor in insulation, ceiling height and sun exposure.
Will it heat in winter?
Yes — these are heat pumps, so they heat and cool. Many MRCOOL® systems keep heating in sub-freezing temperatures; check each model's spec sheet for its low-temperature heating range.
115V or 230V — which do I need?
9K–12K units are usually 115V (standard outlet circuit); 18K and larger are typically 230V. The voltage is shown in the product options and specifications.
Warranty & support
What warranty is included?
MRCOOL® systems carry manufacturer warranty coverage — typically 5–10 years on major components when you register your system after installation.
How do I get help choosing or installing?
Email support@coolheatdirect.com — our U.S. team replies within one business day with sizing, voltage and compatibility help.
Shipping & returns
How fast does it ship?
Most products ship in 3–5 business days with free curbside delivery in the continental U.S. The freight carrier calls to schedule your delivery.
Can I return it?
Returns are accepted within 30 days on new, unopened items in original packaging. A restocking fee may apply to HVAC equipment — we always confirm before issuing a return authorization.
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