Mitsubishi Electric Designer Series EX Heat Pump – Silver 12,000 BTU — Starting at $3,899.08 Installed
The Mitsubishi Electric Designer Series EX Heat Pump – Silver 12,000 BTU designer wall-mounted heat pump (silver) (SUZ-AA12NL + MSZ-EX12NLS) starts at $3,899.08 installed by Sapper HVAC in Phoenix, AZ, including pad, disconnect box with up to 20 ft of electrical, and lineset covers. It carries a 21.7 SEER2 rating using R454B refrigerant.
Installed Starting Price
What's included in the starting price:
- Mitsubishi Electric outdoor unit
- Matching Mitsubishi Electric indoor unit
- Outdoor mounting pad
- Disconnect box with up to 20 ft of electrical in ½" EMT conduit
- Lineset covers
- Standard condensate drain routing
- System startup and commissioning
- Customer walkthrough
Installed starting price includes equipment, mounting pad, disconnect box with up to 20 ft of electrical in 1/2-inch EMT conduit, and lineset covers. Sales tax not included on estimate — added on invoice after acceptance.
Installed starting prices are subject to change based on electrical distance, line set length, routing, condensate pump needs, wall brackets, special access, HOA requirements, equipment availability, and site-specific conditions. Final price confirmed after on-site evaluation.
Full Specifications
| Refrigerant | R454B |
| Cooling capacity | 12,000 BTUH |
| Heating capacity (@47°F) | 15,000 BTUH |
| Heating capacity at 5°F | 7,800 BTUH |
| SEER2 | 21.7 |
| EER2 | 12.2 |
| HSPF2 | 10.0 |
| AHRI Certified Reference # | 215748491 |
Why This System
The Mitsubishi Electric Designer Series EX Heat Pump – Silver 12,000 BTU is a premium designer wall-mounted ductless heat pump that pairs the SUZ-AA12NL outdoor condenser with the MSZ-EX12NLS silver indoor air handler. The Designer EX line combines Mitsubishi Electric's top-tier efficiency with a sleek, finish-grade aesthetic designed to complement modern interiors. Rated at 15,000 BTUH heating at 47°F and 7,800 BTUH at 5°F, it delivers exceptional comfort with a 21.7 SEER2 rating and R454B refrigerant.
In Phoenix Metro homes, a 12,000 BTU system typically covers roughly 450–550 square feet. The silver designer indoor unit is chosen when the homeowner wants the system to be a visual feature rather than hidden. The inverter-driven compressor modulates capacity for steady, whisper-quiet comfort.
Sapper HVAC is veteran-owned, ROC #360142 licensed, and insured — every Mitsubishi installation starts with an on-site sizing review so the system fits the space, not just the budget.
Warranty
Mitsubishi Electric standard residential warranty terms apply to this model. Sapper HVAC provides a 2-year labor warranty on all installations.
Confirm full warranty details at mitsubishicomfort.com or at your estimate.
FAQ
How much does the Mitsubishi Designer Series EX Heat Pump – Silver 12,000 BTU system cost installed in Phoenix?
Starting at $3,899.08 installed. That includes the outdoor and indoor units, mounting pad, disconnect box with up to 20 ft of electrical in 1/2-inch EMT conduit, and lineset covers. Sales tax is added on the invoice. Final price confirmed after a Sapper HVAC site visit.
Does this system heat as well as cool?
Yes — the SUZ-AA12NL is rated at 15,000 BTUH heating at 47°F and 7,800 BTUH at 5°F.
What size space does a 12,000 BTU Mitsubishi system cover?
General guideline: roughly 450–550 sq ft. Sapper HVAC confirms sizing at a free on-site estimate.
What refrigerant does this Mitsubishi system use?
The SUZ-AA12NL + MSZ-EX12NLS uses R454B refrigerant, a reduced-GWP HFC refrigerant adopted as part of Mitsubishi Electric's transition from older R-410A systems.
Other Designer Series EX Heat Pump – Silver options:
Compare with: Designer EX Black or Designer EX White or Designer Hyper-Heat EX Silver
Ready to Install This Mitsubishi Electric System?
Sapper HVAC confirms sizing, reviews the electrical route, and provides a clear installed price for your Phoenix Metro home.
Sapper HVAC · Veteran-Owned · ROC #360142 · SapperHVAC.com · 0% APR financing for 12 months on approved credit