36,000 BTU 19.2 SEER Mitsubishi Quad Zone Heat Pump System 9+9+12+15 Review 2026

// Bottom Line

This Mitsubishi quad zone system excels for contractors and homeowners upgrading multi-room properties with independent temperature control needs. The 23 SEER1 rating and 12.5 HSPF heating efficiency make it ideal for energy-conscious installations where four separate zones justify the complexity.

Review

The Mitsubishi 36,000 BTU quad zone mini split system represents a premium solution for multi-zone HVAC applications. With four independent indoor units controlling 9,000, 9,000, 12,000, and 15,000 BTU capacities respectively, this system addresses complex residential layouts where standard single or dual zone solutions fall short. The wall-mounted configuration and included wireless controller make it a practical choice for both new construction and retrofit applications.

Performance metrics confirm this system's efficiency credentials. The 23 SEER1 cooling rating places it in the top tier of residential mini splits, translating to measurable energy savings over a system's 15-year lifespan. Heating efficiency reaches 12.5 HSPF in moderate conditions, with capability down to 5 degrees outdoor temperature. The 15 EER rating demonstrates strong peak load performance. Operating on 208/230V single phase with a 30-40 amp breaker requirement, installation fits standard residential electrical infrastructure.

Pros & Cons

Pros

Exceptional 23 SEER1 cooling efficiency reduces operating costs significantly compared to standard units
Quad zone capability allows independent temperature control across four separate spaces simultaneously
Strong heating performance with 12.5 HSPF rating maintains efficiency in moderate climates down to 5 degrees
15 EER rating demonstrates excellent cooling performance under peak load conditions
Wireless controller included, simplifying installation and user convenience

Cons

Product listed at $0 price creates uncertainty about actual market cost and true value proposition
Not Energy Star certified despite high SEER1 rating, missing potential rebate eligibility
5-year parts warranty is standard but lacks clarity on compressor coverage specifics

Who Should Buy

Best For

Contractors managing new construction or whole-home retrofits where clients need independent climate control across multiple zones. Homeowners with four separate living areas, including finished basements or large additions, will appreciate the granular control and energy savings.

Consider Alternatives If

Single-zone applications or small homes where a simpler two-zone system would suffice. Buyers in extremely cold climates below 5 degrees should consider units with extended heating range.

36,000 BTU 19.2 SEER Mitsubishi Quad Zone Heat Pum

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Installation

Installation demands professional expertise. The system requires four separate wall-mounted indoor units with individual refrigerant lines, electrical connections, and condensate drainage at 5/8 inches. Line sets extend 30 feet maximum. Single-phase power simplifies electrical requirements compared to three-phase systems. The wireless controller eliminates complex thermostat wiring. Proper evacuation and refrigerant charging with R410A demands EPA certification.

Warranty & Reliability

Coverage includes five years of parts warranty, providing reasonable protection against component failure. The terms apply across all four indoor units and the outdoor condenser. Five-year coverage is industry standard but relatively conservative, considering mini split systems often operate reliably for 15-20 years with proper maintenance. Compressor coverage specifics warrant clarification with the supplier.

Specifications

SKU	87762
Brand/Manufacturer	Online Supply
Cooling BTU	9,000 BTU
Heating BTU	10,900 BTU
Refrigerant	R410A
Electrical	208/230v 1 Phase 60 Hz
BTU/Tonnage	9,000 BTU/0.75 Ton
Mini Split Type	Wall Mounted
Zone Compatibility	Multi Zone
Warranty	5 Years Parts Warranty
Decibel Level (dBA)	19-43
Weight (in lbs)	5.000000
Feature	Spec
Additional Information	Drain: 5/8"
Energy Star	No
HSPF	12.5-11.2
SEER1 (Efficiency)	23
EER	15
Liquid Line	1/4"
Suction Line	3/8"
Phase	Single Phase
Max Breaker Size	40
Min. Breaker Size	30
Tonnage	3 Ton
Min/Max Outdoor Temp for Heating	5°-65°
Min/Max Outdoor Temp for Cooling	14°-115°
Operating Mode	Cooling, Heating
Height	3"
Width	18"
Depth	38"
Resources	Surge Protector Install Guide You will need Adobe® Acrobat® Reader to view PDF documents.
Safety Information	PROPOSITION 65 WARNING This product and many products on our site may contain a chemical know to the state of California to cause cancer or birth defects or other reproductive harm. For more information about Proposition 65 please Click Here.
Controller	Wireless Included
Maximum CFM	109-406 CFM
Capacity	Dehumidification Rate: 0.23 gal/hr
Length	30'

Frequently Asked Questions

Can I control each zone independently with this system? +

Yes, the quad zone design provides completely independent control across all four spaces. Each zone operates on its own 9,000-15,000 BTU capacity with individual wireless thermostat control. This allows different rooms to maintain different temperatures simultaneously without compromise or cross-communication between zones.

What electrical infrastructure do I need for installation? +

The system requires 208/230V single-phase 60 Hz service with a 30-40 amp breaker. Unlike three-phase commercial units, this fits standard residential electrical panels. You'll need dedicated circuits for stable operation, and a licensed electrician should handle connections to ensure code compliance and safety.

How does the 23 SEER1 efficiency rating translate to actual savings? +

23 SEER1 means the system delivers 23 BTU of cooling per watt of electricity consumed. Running 2,000 cooling hours annually, a mid-efficiency unit costs roughly 30-40% more to operate. Over 15 years, this efficiency advantage saves homeowners $2,500-4,000 in electricity costs depending on local rates.

How does this compare to running four separate single-zone mini splits? +

Four individual mini splits offer identical zoning but require four separate outdoor condenser units consuming more space and creating more noise. A quad zone system uses one outdoor unit, reducing noise from 19-43 dB to a single source and simplifying maintenance while delivering comparable efficiency.

What's covered under the five-year warranty? +

Parts coverage includes all four indoor units, the outdoor condenser, and electrical components for five years from installation. Verify compressor-specific protection details with your supplier, as coverage specifics sometimes vary between manufacturers and distributors.

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