MRCOOL® 12k DIY 5th Generation Mini-Split Condenser 115v
Component — Not a Complete System
This is the outdoor unit only. To run, you also need a matching indoor air handler and a refrigerant line set. Looking for the complete system instead? Browse complete 12,000 BTU systems.
SKU DIY-12-HP-C-115D25-O
With Incentives
Save up to $95523.5 SEER2 meets CEE Tier 2 (≥16). Find your state's rebate
Customize it — compatible add-ons only
Same capacity, generation, and voltage — the only units this condenser runs.
Only needed when the run from condenser to indoor unit is longer.
Lifts the condenser above snow, mud, and runoff.
Clean channel for the lines running down your exterior wall.
Universally compatible tools and care items — maintenance kit, coil cleaner, install tools.
MrCool DIY factory warranty — register after install to activate the full coverage tiers.
Sizing Help
Not sure if 12K BTU is right for your space?
Proper sizing prevents short-cycling, high bills, and premature failure. Our sizing tool takes 60 seconds.
Resources
Brochures & Manuals
Description
MRCOOL® 12k DIY 5th Generation Mini-Split Condenser 115v
What's in the Box
Here's what you'll receive with your order
Outdoor Condenser Unit
Heat pump condenser with Gold Fin anti-corrosion coating
Installation Hardware
Mounting brackets and hardware kit
Owner Manual
Installation and operation guide
Key Specifications
23.5
SEER2 Rating
12000BTU
Cooling Capacity
115V
Voltage
54dBA
Noise Level
1
Zone Capacity
MRCOOL® 12k DIY 5th Generation Mini-Split Condenser 115v — Model Details
What this specific model is sized for, how it installs, how it performs, and what it costs to run.
Room & Space Coverage — 12,000 BTU
The MRCOOL® 12k DIY 5th Generation Mini-Split Condenser 115v delivers 12,000 BTU of cooling and heating capacity (1-ton class), sized for spaces up to 600 sq ft in standard 8-ft ceiling rooms with average insulation. At this capacity the unit is ideal for bedrooms, home offices, sunrooms, and single-room additions up to the stated square footage. Rooms with one exterior wall and average shading sit comfortably in the middle of the coverage range.
Efficiency & Operating Cost
This unit is rated at 23.5 SEER2 and 12.5 EER2 at full load. SEER2 measures seasonal cooling efficiency — higher is better — and 23.5 puts this in the premium efficiency tier. For heating performance it carries a 10.2 HSPF2 rating, which translates to roughly 300–350% heating efficiency versus resistance electric — one kilowatt-hour of electricity moves three kWh of heat into the space at mild outdoor temperatures. Running the unit 8 hours a day at full load draws roughly 123 kWh/month — about $20/month at the US average $0.16/kWh residential rate. Real-world draw is usually 30–50% lower because inverter compressors modulate down most of the time. ENERGY STAR certification makes this SKU eligible for federal tax credits (25C in 2026, up to 30% / $2,000 for qualifying heat pumps) and most state/utility rebate programs — check your state page for specific amounts.
Power & Electrical Requirements
Power requirement: 115V 1-phase 60Hz (standard US 120V household outlet). Minimum circuit ampacity is 18A with a maximum overcurrent protection of 20A. Wire the outdoor unit with 12 AWG copper on a dedicated 20A double-pole breaker (or single-pole at 120V), with a disconnect within sight of the condenser per NEC 440.14.
Install Difficulty — DIY-Friendly
This DIY 5th gen Single-Zone Mini-splits system ships with a pre-charged Quick Connect line set — no HVAC license, no vacuum pump, no refrigerant gauges. The pre-charged fittings use a hand-tightened mechanical seal that a homeowner completes in 15 minutes per connection. Typical install time from unboxing to first cool air is 4–8 hours for a single-head system. The system supports line set lengths up to 82ft; longer runs are available as accessory kits. Plan the shortest practical route — every 10ft of line set adds roughly 2% capacity loss. Ships with R-454B refrigerant. R-454B is the EPA 2025-compliant low-GWP replacement for R-410A, required for new-manufacture equipment — lower global-warming footprint without an efficiency penalty.
Sound Level & Comfort Features
Rated sound output is 54 dB(A) at full operation. Quiet mode caps fan speed and compressor rpm for an extra 2–3 dB drop in sound output.
Warranty & Certifications
Manufacturer warranty: 5 on parts, 7 on the compressor. AHRI certified and UL/ETL listed for North American electrical safety — required for most utility rebate and tax credit programs.
Product Details
The 5th Generation 5th Generation MRCOOL® DIY® 12k BTU 23.5 SEER Ductless Heat Pump Single Zone Mini Split Condenser makes home climate control easier than ever. Designed for effortless installation, this system requires no special tools or professional experience and is ideal for spaces between 350-500 sq. ft. With a pre-charged 25-foot QuickConnect® line set filled with R-454B refrigerant, setup is simple and eliminates the need for vacuuming. The included DIYPRO® cable enhances durability, replacing traditional electrical conduit to protect against weather, animals, and yardwork damage. Controlling your comfort is seamless with multiple options, including the included remote, the SmartHVAC app for Apple and Android devices, or hands-free commands via Amazon Alexa and Google Assistant. Additionally, the Gold Fin Condenser provides exceptional corrosion resistance, making it a great choice for coastal environments. Equipped with a variety of features, this system enhances efficiency and comfort. The Timer function helps manage energy use, while Auto mode maintains your desired temperature without constant adjustments. After a power outage, the system automatically resumes previous settings, and the anti-mildew function reduces condensation buildup in the air handler. Built for longevity, the 5th Generation MRCOOL® DIY® Mini Split offers an industry-leading warranty, including a limited lifetime warranty, plus a 7-year compressor and 5-year parts warranty. Combining advanced technology, user-friendly operation, and long-term reliability, this system is designed for hassle-free home comfort.
Specifications
| Cooling Capacity | 12,000 BTU |
| Heating Capacity | 12,000 BTU |
| SEER2 Rating | 23.5 |
| HSPF2 | 10.2 |
| Voltage | 115 V |
| Refrigerant | R-454B |
| Noise Level | 54 dBA |
| Zone Capacity | 1 zones |
| Max Line Set | 82 ft |
| EER2 | 12.5 |
| Tonnage | 1 Ton |
| Phase | 1 |
| Refrigerant Type | R-454B |
| Refrigerant Charge | 30.34 oz |
| Liquid Line Size | 1/4 |
| Suction Line Size | 3/8 |
Features
- NEEP ccASHP Listed
- Intertek listed 5031495
- Easy DIY installation
- Future-proof your investment with the included DIYPro® cable, eliminating the need for electrical conduit.
- Keep the included remote close by, and MRCOOL DIY®'s Follow Me® function will track the air temperature around you to ensure maximum comfort.
- The MRCOOL® Smart HVAC Controller® Module and App fully support Google Assistant & Amazon Alexa out of the box.
Frequently Asked Questions
Everything you need to know about this product
What size room will the MRCOOL® 12k DIY 5th Generation Mini-Split Condenser 115v cool?
Can I install this myself without an HVAC license?
Is this unit eligible for the federal 25C tax credit?
What electrical circuit do I need for installation?
How fast does HVACZAR ship this unit?
What if it arrives damaged or I change my mind?
What is the warranty on the MRCOOL® 12k DIY 5th Generation Mini-Split Condenser 115v?
How long does shipping take?
What size room does 12,000 BTU cover?
What is the efficiency rating?
Do you offer returns?
How can I pay?
Related Products
Ships Nationwide — Shop by State
We deliver the MRCOOL® 12k DIY 5th Generation Mini-Split Condenser 115v to all 50 states via FedEx, UPS, and truck freight. Each state page lists local rebate programs and utility incentives.