Add to cart
MRCOOL Advantage 5G 36,000 BTU 18 SEER2 Ductless Mini Split Air Conditioner and Heat Pump - 230V MRCOOL Advantage 5G 36,000 BTU 18 SEER2 Ductless Mini Split Air Conditioner and Heat Pump - 230V $2,020.95
Air-Con Blizzard 12000 BTU 25 SEER Mini Split Air Conditioner Air-Con Blizzard 12000 BTU 25 SEER Mini Split Air Conditioner Price range: $955.95 through $1,130.95
mrcool|SKU:115V

MRCOOL Advantage 5G 12,000 BTU Ductless Mini Split Air Conditioner and Heat Pump — 115V, 21.2 SEER2

12,000 BTU Climate Control Built for Off-Grid Cabins and Homesteads

550 sq. ft. coverage — Year-round climate control for cabins, studios, and home offices
21.2 SEER2 efficiency rating — DC inverter draws less power from your battery bank
R-454B refrigerant inside — Nearly 80% lower GWP than R-410A systems
Smart control from anywhere — Built-in Wi-Fi with Alexa and Google Assistant support
  • FREE System Design Consultation -- We size this unit to your solar setup and battery bank
  • Free Shipping -- Ships free on all orders, no minimum or threshold

$873.95

0 in stock

Add to Cart
MRCOOL Advantage 5G 12,000 BTU 21.5 SEER2 Ductless Mini Split Air Conditioner and Heat Pump - 115V
MRCOOL Advantage 5G 12,000 BTU 21.5 SEER2 Ductless Mini Split Air Conditioner and Heat Pump - 115V
$873.95

30-day money back · No restocking fee

🔒 100% Secure Checkout

Visa Mastercard American Express Apple Pay Google Pay Klarna Link by Stripe
Free Returns 30-day hassle-free returns.
Free Delivery Every order, every time.
Ships in 3–5 Days Heavy-duty crating included.
4.9/5 Stars 2,400+ verified reviews.

In the box

  • Indoor air handler
  • Outdoor condenser
  • Wireless remote control
MRCOOL Advantage 5G 12,000 BTU 21.5 SEER2 Ductless Mini Split Air Conditioner and Heat Pump - 115V
MRCOOL Advantage 5G 12,000 BTU Ductless Mini Split Air Conditioner and Heat Pump — 115V, 21.2 SEER2
$873.95

12,000 BTU Climate Control Built for Off-Grid Cabins and Homesteads

The MRCOOL 5th Generation 12K BTU 115V Advantage Mini-Split delivers field-tested heating and cooling for spaces up to 550 sq. ft. Designed for grid-independent living, this DC inverter system runs on a single 115V circuit with a 20A breaker, making it straightforward to integrate with your off-grid power setup. The Gold Fin® condenser is built-to-survive coastal and harsh environments, while R-454B refrigerant cuts GWP by nearly 80% versus R-410A. Built-in Wi-Fi with Alexa and Google Assistant gives you full remote control.

FREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORT
Corrosion Resistant Condenser
Low-GWP R-454B Refrigerant
Wi-Fi & Voice Control
21.2 SEER2 DC Inverter
12,000 BTU
Cooling & Heating Capacity
550 sq. ft.
Coverage Area
21.2 SEER2
Energy Efficiency Rating
Climate control that doesn't depend on the grid

Climate control that doesn't depend on the grid

When the grid drops, most HVAC systems stop — leaving your cabin freezing in January or sweltering in August. The MRCOOL Advantage 5G runs on a standard 115V circuit with a 20A breaker, meaning it integrates directly into off-grid solar setups without requiring a massive inverter. At Off Grid Vault, we only carry HVAC equipment we would install on our own cabins. This unit's DC inverter technology and 21.2 SEER2 rating mean it draws significantly less power than conventional systems, preserving your battery bank for the hours when the sun isn't shining. R-454B refrigerant delivers that efficiency with a GWP nearly 80% lower than R-410A — built to perform without compromising your self-reliant setup.

Corrosion-resistant build for harsh environments

Corrosion-resistant build for harsh environments

The Gold Fin condenser coating resists long-term corrosion — critical if your homestead sits near saltwater, experiences high humidity, or endures corrosive coastal air. Standard condensers degrade under those conditions, losing efficiency and shortening system life. This unit is AHRI certified and NEEP ccASHP listed, which means its performance ratings are independently verified, not just marketing claims. CEE Tier 1 - North certification confirms it meets regional efficiency benchmarks. For builders, verified specs matter: you need to know exactly what 12,000 BTU of heating and cooling capacity translates to in real-world conditions, especially when sizing your solar array and battery bank around that load.

Smart control without sacrificing reliability

Smart control without sacrificing reliability

Built-in Wi-Fi and the MRCOOL SmartHVAC app give you full temperature control from your phone, plus integration with Amazon Alexa and Google Assistant. The Follow Me function on the included remote tracks air temperature around you for targeted comfort. Timer mode and refrigerant leakage detection add practical safeguards for unattended operation — important when you are away from your cabin for days. This is field-tested technology designed for real use, not novelty features that complicate your system. The 82 ft max line set length gives you flexibility in unit placement, and at 67 lbs for the condenser, installation is manageable without heavy equipment.

Compatibility Check

Verify your setup meets these requirements before ordering.

  • Room size up to 550 sq. ft. for rated performance
  • 115V / 60Hz single-phase power with dedicated 20A max fuse breaker
  • Minimum circuit ampacity of 19A available at your panel

Where This Mini-Split Shines

Engineered for real-world off-grid and grid-independent applications.

Off-Grid Cabins & Homesteads
Tiny Homes & ADUs
Home Offices & Bedrooms
Coastal Properties

Full specifications

At a glance

Dimensions
See product page
Power
115
Warranty
See product page
Full specifications18 data points across 4 categories

Dimensions

DimensionsSee product page

Power & Performance

SEER221.2
Tonnage1
Cooling Capacity12000 BTU
Heating Capacity12000 BTU
Voltage115
Phase1
Cycle60
Max Fuse Breaker20
Min Circuit Ampacity19
Zone Capacity1
InverterDC

Materials

Refrigerant TypeR-454B
Condenser CoatingGold Fin® corrosion resistant

Compliance & Warranty

AHRI CertifiedYes
NEEP ccASHP ListedYes
CEE Tier1North
WarrantySee product page

The Off Grid Vault Promise

We stand behind every product we sell — because serious off-grid builds demand serious accountability.

Free ShippingShips free on all orders, including LTL freight on large systems. No thresholds, no fine print.
30-Day Performance GuaranteeIf it doesn't perform as specified, we make it right. Uninstalled returns accepted within 30 days in original packaging.
Free System Design ConsultationOur engineers size your system for your actual consumption — no guesswork, no incompatible components.
★★★★★
“Installed this in my 480 sq. ft. cabin in northern Arizona. Runs on my 48V system with a 3000W inverter without any issues. The DC inverter tech really does pull less power — I can see the difference on my battery monitor compared to the old window unit. Gold Fin condenser gives me peace of mind with the dust and wind out here. The smart app is a solid bonus for pre-cooling the cabin before I arrive on Friday evenings.”
D
Derek L.Flagstaff, AZ

Advantage 5G 12,000 BTU 21.5 SEER2 Ductless Mini Split Air Conditioner and Heat Pump – 115V

Experience powerful, eco-friendly comfort with the MRCOOL® 5th Generation 12K BTU 115V Advantage Mini-Split System—perfect for heating and cooling spaces up to 550 sq. ft. This high-performance ductless system includes both the indoor air handler and the outdoor condenser, designed to work together seamlessly to deliver year-round climate control with minimal environmental impact.

Both components now feature R-454B refrigerant, a sustainable upgrade that boosts energy efficiency while significantly reducing greenhouse gas emissions—boasting a Global Warming Potential (GWP) nearly 80% lower than older refrigerants like R-410A. This forward-thinking design helps reduce your carbon footprint without sacrificing performance.

The Advantage air handler is built for quiet operation and space-saving convenience, making it ideal for bedrooms, living rooms, and home offices. Its sleek, modern design is paired with smart features, including built-in Wi-Fi, which gives you full control from your smartphone or tablet via the MRCOOL® SmartHVAC app. You can also manage settings using Amazon Alexa or Google Assistant, or schedule automatic temperature adjustments for optimal overnight comfort.

The Advantage condenser, professionally installed for best performance, supports energy savings with up to a 21.2 SEER2 rating and HSPF2-4 of 8.7. This means lower utility bills without compromising on consistent, comfortable airflow. Because it’s a ductless system, installation is quicker and less expensive than traditional setups.

Enjoy peace of mind with a 2-year parts warranty, 1-year compressor warranty, and 1-year remote control warranty upon registration. For added protection, you can enroll in the MRCOOL® Care Program and qualify for a Limited Lifetime Warranty.


Advantage 5th Gen 12k BTU 115V Condenser Specs

  • SEER2: 21.2
  • Tonnage: 1
  • Cooling Capacity: 12000 BTU
  • Heating Capacity: 12000 BTU
  • Voltage: 115
  • Phase: 1
  • Cycle: 60
  • Max Fuse Breaker: 20
  • Min Circuit Ampacity: 19
  • Zone Capacity: 1
  • Refrigerant Type: R-454B
  • Inverter: DC
  • Max Line Size Length: 82 ft
  • Dimensions: 24.02″ H x 34.92″ W x 13.27″ D
  • Weight: 67.02 lbs

Advantage 5th Gen 12k BTU 115V Air Handler Specs

  • Tonnage: 1
  • Voltage: 115
  • Phase: 1
  • Cycle: 60
  • Max Fuse Breaker: 15
  • Min Circuit Ampacity: 3
  • Mount Type: Wall
  • Number of Speeds: 5
  • Liquid Line Size: 1/4
  • Suction Line Size 3/8
  • Dimensions: 14.96″ H x 34.45″ W x 11.22″ D
  • Weight: 25.13 lbs


MRCOOL Advantage 5th Gen 12k Mini Split Features

  • Gold Fin® condenser: corrosion resistant – live on the coast? Don’t worry, our condenser is built to resist long term corrosion
  • Includes features such as timer mode, refrigerant leakage detection, and more
  • R-454B refrigerant
  • AHRI certified
  • NEEP ccASHP Listed
  • CEE Tier1 – North
  • 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.


Your Satisfaction with MRCOOL is Guaranteed:

  • Lowest Price Guaranteed
  • Limited 2-Year Parts Warranty
  • Limited 1-Year Compressor Warranty

Reviews

There are no reviews yet.

Be the first to review “MRCOOL Advantage 5G 12,000 BTU Ductless Mini Split Air Conditioner and Heat Pump — 115V, 21.2 SEER2”

Your email address will not be published. Required fields are marked *

Frequently Asked Questions

At $873, this unit replaces both a window AC and electric resistance heater for a 550 sq. ft. space. Window units typically pull 800–1,200W while cooling, and electric heaters draw 1,500W. The MRCOOL DC inverter modulates its draw, often running at 400–600W during moderate conditions. That lower sustained load means you can size a smaller, less expensive inverter and battery bank. Over a full heating and cooling season, the 21.2 SEER2 efficiency translates to real kWh savings — money that stays in your pocket instead of going to the utility or requiring additional solar panels.
Off Grid Vault is an authorized dealer for the brands we carry. When you purchase from us, your manufacturer warranty is fully valid and warranty claims go through us — not through a faceless ticket queue. We stand behind every product on our shelf with a 30-day performance guarantee. If the unit does not perform to its stated specifications, we make it right. That is the difference between buying from a curated specialist and pulling a box off a generic marketplace listing with no after-offer accountability.
This unit runs on a standard 115V circuit with a 20A max fuse breaker and 19A minimum circuit ampacity. For a solar setup, that means you need an inverter capable of at least 2,300W continuous output to support this load safely. The DC inverter technology modulates compressor speed, so actual running wattage is often well below the maximum draw. If you are unsure whether your existing system can handle it, take advantage of our free system design consultation — tell us your battery bank capacity and inverter specs, and we will confirm compatibility before you buy.
The Gold Fin condenser coating is specifically engineered to resist corrosion from salt air, humidity, and environmental exposure. For coastal homesteads — where standard condensers can show visible degradation within two to three seasons — this coating extends functional life significantly. The unit is also AHRI certified and NEEP ccASHP listed, meaning its performance has been independently tested and verified. Those certifications are not self-awarded; they require third-party lab testing. Combined with the R-454B refrigerant, which operates efficiently across a wide temperature range, this unit is built for long-term deployment in environments that destroy lesser equipment.
The MRCOOL Advantage line is designed for professional installation to ensure optimal performance, correct refrigerant charge, and valid warranty coverage. The 82 ft max line set length gives your installer flexibility in placement. Plan for a qualified HVAC technician to handle the refrigerant connection and system startup. If you are building a new cabin or homestead, we recommend scheduling installation after your electrical system is in place but before interior walls are finished — this simplifies line set routing. Lead times vary; contact us for current availability and we will coordinate around your build schedule.
The 12,000 BTU rating covers spaces up to 550 sq. ft. under standard conditions. Real-world performance depends on insulation quality, ceiling height, window area, and your climate zone. In a well-insulated cabin in a moderate climate, this unit will comfortably handle that full 550 sq. ft. In a poorly insulated structure with large windows in an extreme cold region, effective coverage may be closer to 350–400 sq. ft. For accurate sizing, use our free system design consultation — provide your square footage, insulation type, and location, and we will tell you honestly whether this unit is sufficient or if you need the next size up.
SKU: 115V Category: Brand:

The Off Grid Vault Promise

We stand behind every product we sell — because serious off-grid builds demand serious accountability.

Free Shipping Ships free on all orders, including LTL freight on large systems. No thresholds, no fine print.
30-Day Performance Guarantee If it doesn't perform as specified, we make it right. Uninstalled returns accepted within 30 days in original packaging.
Free System Design Consultation Our engineers size your system for your actual consumption — no guesswork, no incompatible components.

Related products

About mrcool Mini-Split HVAC

mrcool is a trusted manufacturer of premium mini-split hvac. OffGridVault is an authorized dealer offering the full mrcool lineup with free delivery, price match guarantee, and expert support.

View all mrcool products →

Related Categories

AC/DC Enclosure 2 products Air Handlers 8 products Air Heaters 2 products Amp Hub 2 products Awnings 15 products Batteries 3 products
Join the Grill Island Community

Expert Picks, Straight to Your Inbox

No spam. Just the gear worth knowing about.

No spam. Unsubscribe anytime.