MXZ-5C42NA - Mitsubishi 42,000 BTU 5-Zone Heat Pump Unit - R410A - MXZ-5C42NA

Performance

• Cooling Capacity 43,000 BTU
• Heating Capacity 53,600 BTU
• SEER 19.7
• HSPF 10.30
• Heating Minimum Temp 5 F
• Cooling Minimum Temp 14 F
• Room Cooling/Heating Capacity up to 1750 sq ft

What our Experts Think

• Powerful Multi‑Zone Outdoor System: The Mitsubishi MXZ‑5C42NA 42,000 BTU 5‑Zone Heat Pump Outdoor Unit is a robust choice for multi‑room climate control, capable of powering up to five indoor units for personalized heating and cooling across several zones.

• Strong Seasonal Efficiency: With high SEER2 (up to ~19.7) and HSPF2 (~10.3) ratings, it delivers efficient performance that helps reduce energy costs compared with traditional systems.

• Balanced Cooling & Heating Output: Rated around 40,500 BTU cooling and 45,000 BTU heating with capacity peaks up to about 43,000 BTU (cool) and 53,600 BTU (heat) depending on indoor/outdoor conditions, offering reliable comfort year‑round.

• Flexible Indoor Pairing: Designed for multi‑zone setups, it pairs with a range of indoor unit types (wall mounts, cassettes, ducted or floor units) giving you flexibility to tailor each zone’s comfort level.

• Quiet & Durable Operation: Built with variable‑speed inverter compressor technology and a low‑noise outdoor footprint (~56–58 dB), it balances performance with quieter operation in residential settings.

• Reliable Protection Features: Includes built‑in safeguards like high‑pressure protection, thermal protection, and automatic restart, enhancing system durability and reliability.

• Long Line Length Support: Allows extended piping lengths and individual line runs (up to ~82 ft per indoor unit), offering flexibility for complex installations.

• Classic R410A System: Uses tried‑and‑true R410A refrigerant, suitable for existing installations where R410A units are being replaced or expanded — though newer R454B systems are now common for new builds.

• Ideal for Zoned Comfort: A top pick when you want customized climate control across multiple rooms or zones with one outdoor unit managing efficiency and performance for the entire system

Q&A

Q: What kind of unit is this?
A: The Mitsubishi MXZ‑5C42NA is a multi‑zone heat pump outdoor condenser designed for ductless mini‑split systems, supporting up to five indoor units for customized zoned comfort.

Q: What capacity does it deliver?
A: It provides a 42,000 BTU nominal capacity, with cooling up to about 43,000 BTU and heating up to about 53,600 BTU depending on indoor units used.

Q: What refrigerant does it use?
A: Uses R410A refrigerant, a widely supported refrigerant in mini‑split systems for efficient heat transfer.

Q: How energy efficient is it?
A: Offers high efficiency with up to ~19.7 SEER2, EER2 ~9.2, and HSPF2 ~10.3, helping reduce energy consumption.

Q: What climates and conditions does it operate in?
A: Designed for year‑round cooling and heating, functioning in a broad range of outdoor temperatures with quiet operation around 56–58 dB(A).

Q: What installation flexibility does it offer?
A: Works with various compatible indoor units (wall–mounted, ceiling cassette, ducted, etc.) and supports flexible piping lengths for multi‑zone configurations.

Q: What durability features are included?
A: Includes anti‑corrosion Blue Fin coating and protective circuitry such as high‑pressure and compressor thermal protection for long‑term reliability.

Q: What are typical electrical requirements?
A: Operates on 208/230 V single‑phase power with recommended breaker and fuse sizes for safe, standard HVAC installation.

Maintenance Tips

• Multi‑zone performance: Supports up to 5 indoor units for independent comfort zones from one outdoor heat pump.

• Efficient cooling & heating: Rated ~40,500 BTU cooling (up to ~43,000 BTU max) and ~45,000 BTU heating at 47 °F; heating remains substantial at lower temps.

• Variable‑speed INVERTER compressor: Smooth modulation for improved efficiency and reduced cycling.

• Modern R‑410A refrigerant: Standard refrigerant for balanced efficiency and reliability.

• Energy performance: SEER2 up to ~19.7 and HSPF2 up to ~10.3, offering solid seasonal efficiency.

• Quiet operation: Outdoor sound as low as ~56–58 dB(A).

• Wide operating range: Effective cooling and heating across typical seasonal temperatures.

• Durable build: Robust outdoor design with standard protections (high‑pressure switch, thermal protection).

• Standard electrical: 208/230 V, single‑phase, 60 Hz with recommended ~40 A breaker.

• Flexible piping: Supports line lengths up to ~262 ft total, ~82 ft per indoor unit for installation flexibility.