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

// Bottom Line

This 36,000 BTU quad-zone system works best for homeowners needing to condition multiple rooms independently with excellent energy efficiency. It's ideal for retrofits or new construction where zone control matters more than simplicity, and the 19.2 SEER rating delivers meaningful utility savings over time.

Review

The Mitsubishi 36,000 BTU quad-zone heat pump represents a smart middle ground for homeowners balancing efficiency with comfort flexibility. At 19.2 SEER, it competes with premium systems while offering four independent zones instead of one. The system ships with wireless controls, eliminating a typical installation expense. Online Supply positions this unit as a contractor-friendly option that doesn't sacrifice performance for convenience. It's relevant for anyone tired of whole-home temperature compromises.

Performance data shows this system delivers cooling at 23 SEER1 with an EER of 15, beating many competitors in efficiency metrics. Heating HSPF ratings between 12.5 and 11.2 ensure strong winter operation down to 5 degrees. The quad configuration distributes 9,000 BTU to three zones and 12,000 BTU to one, accommodating 0.75-ton individual capacity. CFM output ranges from 109 to 406 cubic feet per minute, adapting to room size and comfort demand. Dehumidification removes 0.23 gallons hourly, useful in humid climates.

Pros & Cons

Pros

Exceptional SEER1 rating of 23 with 19.2 SEER overall, translating to lower operating costs than standard systems
Quad-zone configuration (9+9+9+12 BTU distribution) lets you heat or cool specific rooms independently
HSPF range of 12.5 to 11.2 provides strong winter heating performance down to 5 degrees outdoor temperature
Wall-mounted design saves floor space and integrates cleanly into modern interiors
Wireless controller included, eliminating extra installation costs and providing convenient remote management

Cons

Refrigerant line length of 15 feet limits installation flexibility for larger homes or complex layouts
No Energy Star certification despite high SEER ratings raises questions about overall efficiency claims
Single-phase 208/230v electrical requirement may require panel upgrades in older homes with different voltage supplies
Decibel range of 19 to 43 dBA means the system can get noticeably loud at maximum output

Who Should Buy

Best For

Contractors and homeowners upgrading multi-zone systems or installing new HVAC in homes where independent room control justifies higher upfront costs. This system suits energy-conscious buyers in moderate climates who value efficiency ratings and can accommodate a 15-foot refrigerant line.

Consider Alternatives If

Anyone with extreme space constraints, homes requiring refrigerant lines longer than 15 feet, or single-zone cooling needs where simpler systems would deliver better value.

36,000 BTU 19.2 SEER Mitsubishi Quad Zone Heat Pum

Buy at HVACDirect →

Installation

Installation requires standard mini-split setup including refrigerant line connections using 1/4-inch liquid and 3/8-inch suction lines. The 5/8-inch drain line needs proper slope toward exterior discharge. Electrical connections demand 208/230v single-phase power with breakers sized between 30 and 40 amps. Wall mounting is straightforward, though routing four zone lines through walls increases labor slightly compared to single-zone units. The included wireless controller simplifies commissioning significantly.

Warranty & Reliability

This unit carries a 5-year parts warranty covering component failures, which is standard for mini-split systems but shorter than some competitors offering 7-year coverage. Parts warranties typically exclude labor and refrigerant, so budget separately for service calls. The 5-year coverage aligns with expected compressor reliability on quality units, making it reasonable protection for residential applications.

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
Controller	Wireless Included
Additional Information	Drain: 5/8"
Maximum CFM	109-406 CFM
Capacity	Dehumidification Rate: 0.23 gal/hr
Liquid Line	1/4"
Suction Line	3/8"
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.
Energy Star	No
HSPF	12.5-11.2
SEER1 (Efficiency)	23
EER	15
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°
Length	15'

Frequently Asked Questions

Can I use this system in very cold climates? +

Yes, but with limitations. The system operates down to 5 degrees for heating, making it viable in cold climates. However, HSPF ratings of 11.2 to 12.5 suggest supplemental heat may be needed during extreme cold snaps in areas regularly below zero.

How does the 15-foot refrigerant line length affect installation options? +

The 15-foot maximum limits outdoor unit placement distance from indoor wall units. For larger homes or complex layouts requiring longer runs, you'll need multiple systems or should consider alternative equipment. Verify your installation matches this constraint before purchasing.

Is a 19.2 SEER rating really better than 16 SEER systems? +

Yes, meaningfully. Higher SEER ratings reduce energy consumption proportionally. A 19.2 SEER system running 8 hours daily uses approximately 20 percent less electricity than a 16 SEER unit, generating cumulative savings exceeding $300 annually in most regions.

Why isn't this system Energy Star certified despite its high SEER rating? +

Energy Star certification involves testing protocols and criteria beyond SEER alone, including heating performance thresholds and specific regional efficiency requirements. High SEER doesn't guarantee Energy Star status, though this unit's specs suggest it could qualify under different testing conditions.

What does the 5-year parts warranty actually cover? +

Standard parts warranties cover internal compressor and refrigeration failures, circuit boards, and sealed components. Excluded are typically labor, refrigerant, installation issues, and normal wear items. Review the specific warranty document to confirm coverage boundaries before relying on it.

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