Best Mini Split AC & Heat Pumps (2026): MrCool DIY vs Easy Pro vs Advantage
Ductless mini splits are the most efficient way to heat and cool your home — and with the MrCool DIY line, you can install one yourself in under 5 hours, saving $3,000-$8,000 in labor costs. We break down every model to help you pick the right one.
Quick Picks
MrCool DIY 4th Gen
From $1,549. No HVAC tools or certification needed. Pre-charged QuickConnect line sets.
Read reviewMrCool DIY 5th Gen
Low-GWP R-454B refrigerant. Up to 22.7 SEER2. Same easy DIY install.
Read reviewMrCool Easy Pro
Top efficiency in the lineup. Outperforms DIY and Advantage in cooling tests.
Read reviewMrCool Advantage
Lowest price in the lineup. Requires professional install but great value.
Read reviewWhy Mini Splits Are Taking Over California Homes
Traditional central HVAC systems cost $8,000-$15,000 installed and waste energy pushing conditioned air through leaky ductwork. Ductless mini splits eliminate that waste entirely. They mount directly on your wall, connect to an outdoor compressor via a small conduit, and let you control the temperature in each room independently.
The efficiency difference is dramatic. A high-efficiency mini split rated at 22.7 SEER2 uses roughly 1,058 kWh over a summer cooling season, compared to approximately 1,841 kWh for a 20 SEER central system. That is a 42% reduction in cooling energy consumption. At California electricity rates, that gap translates to hundreds of dollars every year.
The math: With PG&E peak TOU rates at $0.40-$0.48/kWh, those 783 saved kWh equal $313-$376 in annual cooling savings alone. Add heating season savings and the total can reach up to 26% off your energy bill.
And here is the game changer: with MrCool's DIY line, you can install a mini split yourself in about 4.5 hours — no HVAC license, no vacuum pump, no EPA certification. That saves $3,000-$8,000 in professional installation costs, bringing the total cost of a ductless system to $1,549-$3,329 depending on size.
Head-to-Head Comparison
| Spec | MrCool DIY 4th Gen Best DIY Install | MrCool DIY 5th Gen Newest Model | MrCool Easy Pro Best Performance | MrCool Advantage Best Budget |
|---|---|---|---|---|
| Price | $1,549 - $3,329 | From ~$1,600 | ~40% more than DIY | Lowest in lineup |
| Efficiency | 22 SEER2 | 22.7 SEER2 | Highest in lineup | Up to 20 SEER2 |
| BTU Range | 12K - 36K BTU | 12K BTU | 12K - 36K BTU | 12K - 36K BTU |
| Heating Min Temp | -4°F | -4°F | -4°F | 5°F |
| Refrigerant | R-410A | R-454B (low GWP) | R-410A | R-410A |
| Installation | DIY (QuickConnect) | DIY (QuickConnect) | DIY-adjacent / Pro | Professional required |
| Warranty | 7yr compressor / 5yr parts | 7yr compressor / 5yr parts | 7yr compressor / 5yr parts | 7yr compressor / 5yr parts |
| Multi-Zone | Up to 6 zones ($7,300) | TBD | Up to 5 zones | Up to 5 zones |
MrCool DIY 4th Gen
The original DIY mini split that started it all
The MrCool DIY 4th Gen is the unit that proved homeowners can install their own mini split. Its pre-charged QuickConnect line sets are the key innovation — the refrigerant is already sealed inside, so you never need to handle R-410A, own a vacuum pump, or hold an EPA Section 608 certification. You run the line set from the indoor unit through a 3-inch hole in your wall to the outdoor compressor, tighten the fittings, and the system is ready.
At 22 SEER2, it significantly outperforms most central AC systems. The inverter compressor adjusts speed continuously rather than cycling on and off, which means more consistent temperatures and less energy waste. It heats down to -4°F, making it a true year-round solution even in California's colder mountain and northern communities.
Pros
- True DIY install — no HVAC tools or EPA cert needed
- 22 SEER2 efficiency saves up to 26% on energy costs
- Heats down to -4°F for year-round use
- Multi-zone capable up to 6 zones
- Widely available at Home Depot and other retailers
Cons
- R-410A refrigerant being phased out (higher GWP)
- Not the most efficient in the MrCool lineup
- Line sets have fixed lengths — measure carefully before ordering
Key Specs
MrCool DIY 5th Gen
Next-gen refrigerant, peak efficiency
The 5th Gen is MrCool's answer to the global refrigerant transition. It uses R-454B, which has a significantly lower global warming potential (GWP) than the R-410A used in the 4th Gen. This matters because the EPA is phasing down HFC refrigerants under the AIM Act, and R-454B is the industry's leading replacement. Buying the 5th Gen means your system uses the refrigerant of the future, not the past.
Efficiency gets a bump too — up to 22.7 SEER2 compared to the 4th Gen's 22 SEER2. The same QuickConnect DIY installation system carries over, so the install experience is identical. Currently available as a 12K BTU single-zone unit at Costco, with more sizes expected to roll out. If you are buying a single-zone system and want the latest technology, the 5th Gen is the one to get.
Pros
- R-454B refrigerant — future-proof, lower environmental impact
- Highest SEER2 rating in the DIY lineup (22.7)
- Same proven QuickConnect DIY install
- Available at Costco
Cons
- Limited to 12K BTU currently — fewer size options
- Multi-zone options not yet available
- Newer product with less long-term track record
Key Specs
MrCool Easy Pro
Maximum efficiency, professional-grade results
The Easy Pro sits at the top of MrCool's lineup for a reason: it consistently outperforms both the DIY and Advantage lines in cooling efficiency tests. If you are optimizing for the lowest possible energy bills and want the best performance money can buy, this is the unit.
The "DIY-adjacent" installation means you can handle much of the setup yourself, but some steps may benefit from professional involvement depending on your local codes and comfort level. At roughly 40% more than the DIY line, the premium buys you measurably better cooling efficiency — which, at California electricity rates, can pay for itself over the system's 12-20 year lifespan.
Pros
- Highest cooling efficiency in the MrCool lineup
- Outperforms DIY and Advantage in head-to-head tests
- Professional-grade build quality
- Multi-zone up to 5 zones
Cons
- 40% price premium over DIY line
- May require some professional assistance
- Harder to find at big-box retailers
Key Specs
MrCool Advantage
Lowest entry price, professional installation
The Advantage is MrCool's most affordable line. It drops the QuickConnect DIY system in favor of traditional flare fittings, which means you need an HVAC technician with a vacuum pump, manifold gauges, and EPA certification to complete the installation. The upside? The equipment itself costs less than the DIY line.
If you are already planning to hire an HVAC professional — maybe because your local code requires it, or you just prefer having a pro handle it — the Advantage gives you MrCool quality at the lowest equipment price. The efficiency is slightly lower at up to 20 SEER2 (vs 22+ for the DIY line), and heating performance drops off below 5°F rather than -4°F, but for most California climates that difference is negligible.
Pros
- Lowest equipment price in MrCool lineup
- Professional install means guaranteed code compliance
- Same 7-year compressor warranty
- Multi-zone up to 5 zones
Cons
- Requires professional HVAC installation ($1,500-$3,000+ labor)
- Lower efficiency (20 SEER2 vs 22+)
- Heating only to 5°F (vs -4°F for DIY)
- Total installed cost may exceed DIY line
Key Specs
DIY Installation Guide: What You Actually Need
The biggest selling point of the MrCool DIY line is that you can install it yourself. Here is exactly what that involves — no sugarcoating.
Tools You Need
Installation Steps (Simplified)
Mount the indoor bracket
Find studs, drill pilot holes, secure the mounting plate. Must be level and at least 7 feet from the floor.
Drill the wall penetration
Use the 3-inch hole saw to cut through the exterior wall. Angle slightly downward for drainage.
Run the line set
Feed the pre-charged QuickConnect line set through the wall. Connect to the indoor unit — just hand-tighten plus a wrench turn.
Position the outdoor unit
Place on a level pad or wall brackets. Connect the other end of the line set with the same QuickConnect fittings.
Wire the electrical connection
Connect the power cable from outdoor unit to a dedicated 20A or 30A breaker (depending on unit size). This step may require a permit in some jurisdictions.
Seal, test, and enjoy
Caulk the wall penetration, power on the unit, and run through the setup on the remote. Total time: approximately 4.5 hours.
Important: Check your local building codes before installing. Some California cities require permits for HVAC work, and the electrical connection may need to be done by a licensed electrician. The refrigerant side (line set connection) does not require EPA certification with MrCool's QuickConnect system since you never open the refrigerant circuit.
Energy Savings: The Real Math
Mini split efficiency is measured in SEER2 (Seasonal Energy Efficiency Ratio). Higher SEER2 means less electricity consumed per BTU of cooling delivered. Here is how the numbers play out in real California energy costs.
Summer Cooling Season Comparison
Annual Savings at California Rates
| Utility | Peak Rate | kWh Saved vs 14 SEER | Annual Savings |
|---|---|---|---|
| PG&E | $0.40-$0.48/kWh | 1,513 kWh | $605-$726 |
| SCE | $0.36-$0.52/kWh | 1,513 kWh | $545-$787 |
| SDG&E | $0.47-$0.70/kWh | 1,513 kWh | $711-$1,059 |
Savings calculated comparing 14 SEER old central AC (2,571 kWh) to 22.7 SEER2 mini split (1,058 kWh) for cooling season only. Actual savings vary by usage patterns, home size, insulation, and climate zone. Rates as of April 2026 CPUC filings.
Payback period: A MrCool DIY 4th Gen 12K BTU at $1,549 (self-installed) saving $600/year on a PG&E bill pays for itself in under 2.6 years. With a 12-20 year lifespan, that is 10-17 years of pure savings.
What Size Mini Split Do You Need?
Mini splits are sized in BTU (British Thermal Units). The right size depends on the square footage of the space you are conditioning. Here is a general guide:
For California's Inland Empire, Central Valley, and desert communities where summer temperatures regularly exceed 100°F, consider sizing up one step for better performance during extreme heat.
California Homeowners: Pair Your Mini Split with Solar
A mini split is one of the smartest energy investments a California homeowner can make. But the smartest move? Pairing it with rooftop solar. Here is why the combination is so powerful:
TOU Rate Arbitrage
California utilities charge the highest rates during peak hours (4-9 PM). But your solar panels produce the most power from 10 AM to 4 PM — exactly when you need cooling most. Running your mini split on solar-generated electricity during the day means you avoid peak TOU rates entirely. PG&E peak rates run $0.40-$0.48/kWh. Solar electricity costs you nothing once the panels are paid for.
Pre-Cool Strategy
Under NEM 3.0, excess solar exported to the grid earns very little. A better strategy: use your solar to pre-cool your home with the mini split before peak hours begin at 4 PM. Your home acts as a thermal battery — cool it down to 68°F by 3:30 PM, then set the mini split to a higher temp or eco mode during peak hours. You stay comfortable while barely touching the grid.
Combined Savings
A high-efficiency mini split alone can cut cooling costs by 42%. Solar panels can offset 80-100% of your remaining electricity. Together, a California homeowner paying $250/month to their utility could see that drop to a fixed $100-$125/month solar payment — locked in for the life of the system, immune to rate increases.
See How Much You Could Save with Solar
California homeowners can qualify for programs that put solar on your roof at no cost out of pocket, with a fixed monthly payment that is typically 30-50% less than your current utility bill.
Check If You QualifyWhich Mini Split Should You Buy?
You want to save the most money overall
MrCool DIY 4th Gen. The sweet spot. DIY install saves $3,000-$8,000 on labor, 22 SEER2 cuts energy costs, and it is widely available in multiple sizes. Best all-around value.
You want the latest technology
MrCool DIY 5th Gen. R-454B refrigerant is the future, and 22.7 SEER2 is the best efficiency in the DIY class. Limited to 12K BTU currently, so best for single-room applications.
You want maximum performance and do not mind paying more
MrCool Easy Pro. The best efficiency numbers in MrCool's entire lineup. Worth the 40% premium if you are in a high-rate utility territory (SDG&E) where every efficiency point saves real money.
You are hiring an HVAC tech anyway
MrCool Advantage. Lowest equipment cost. If you need professional install for code compliance or personal preference, this gives you the best hardware value. Factor in $1,500-$3,000 for labor.
Frequently Asked Questions
Can I really install a mini split myself?
How much will I save on my energy bill?
What is the difference between the DIY 4th Gen and 5th Gen?
How long does a mini split last?
Do mini splits work in cold weather?
Can I pair a mini split with solar panels?
Is a mini split better than a window AC unit?
Ready to Go Solar in California?
A mini split cuts your cooling costs by up to 42%, but pairing it with rooftop solar can eliminate most of your electricity bill entirely. California homeowners can qualify for programs that put solar on your roof at no cost out of pocket, with fixed monthly payments that are typically 30-50% less than your current utility bill.
Check If You Qualify