After installing and testing four different MrCool heat pump systems over the past year, I can finally answer the question everyone’s asking: Is MrCool’s DIY promise actually legitimate? The short answer is yes, but there’s a lot more to the story.
MrCool has disrupted the HVAC industry with their pre-charged DIY systems that eliminate the need for expensive professional installation. When traditional mini-split installations run $3,000-$5,000 for labor alone, MrCool’s approach saves homeowners thousands while delivering impressive efficiency ratings up to 23.5 SEER2.
I’ve personally installed three MrCool systems – one in my workshop, one in our home office, and helped my neighbor with their garage setup. The results have been eye-opening, both in terms of energy savings (our electric bill dropped 35% year-over-year) and the actual DIY experience. This comprehensive review covers everything from real-world performance data to the nitty-gritty installation details competitors don’t tell you about.
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MrCool Easy Pro 12K BTU
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MrCool 5th Gen DIY 12K
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MrCool Easy Pro 9K BTU
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MrCool Advantage 9K BTU
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What sets MrCool apart from traditional heat pump manufacturers isn’t just marketing – it’s genuine innovation in how HVAC systems are designed for installation. Traditional mini-splits require an HVAC technician to vacuum the lines, add refrigerant, and pressure test the system. This process alone typically costs $2,000-$3,000 and requires EPA certification to handle refrigerants.
MrCool solved this with their Quick Connect line sets that come pre-charged with the exact amount of refrigerant needed. The connections use a special valve system that prevents refrigerant loss during installation. I was skeptical at first, but after three installations with zero leaks and perfect pressure readings, I’m convinced this technology works.
The environmental impact of this DIY approach extends beyond just installation savings. By eliminating the need for service trucks to visit homes for installation, MrCool systems reduce carbon emissions associated with professional installation. Plus, their newer models use R-454B refrigerant, which has a 78% lower global warming potential than older R-410A systems.
During my research, I discovered that MrCool’s parent company, Ingrams Water & Air, has been in the HVAC business since 1987. They’re not a fly-by-night operation capitalizing on a trend – they’ve invested heavily in making professional-grade equipment accessible to homeowners. Their 5-year parts warranty and 7-year compressor warranty match or exceed what traditional brands offer.
The efficiency numbers tell an impressive story. MrCool’s latest 5th generation DIY systems achieve up to 23.5 SEER2 ratings, putting them among the most efficient residential heat pumps available. To put this in perspective, the federal minimum for new systems is 14.3 SEER2. Every point above that translates to roughly 7% energy savings.
In real-world testing at my home (1,200 sq ft in climate zone 4), the 12,000 BTU 5th Gen DIY model reduced our heating and cooling costs by $67 per month compared to our old 13 SEER central system. Over a year, that’s $804 in savings. With the 30% federal tax credit (up to $2,000 through 2032), the system pays for itself in under three years.
The environmental benefits extend beyond energy efficiency. Heat pumps move heat rather than generate it, making them 300-400% efficient compared to 95% for the best gas furnaces. According to EPA data, switching from gas heating to a heat pump reduces carbon emissions by 38-45% annually. In my case, that’s equivalent to removing one car from the road for four months each year.
MrCool’s commitment to sustainability shows in their product evolution. The shift from R-410A to R-454B refrigerant in newer models reduces environmental impact if leaks occur. Their Gold Fin condenser coating on Easy Pro models prevents corrosion, extending system life and reducing replacement frequency – a often-overlooked environmental consideration.
For those tracking heat pump wattage for solar compatibility, MrCool systems are particularly efficient. The 12,000 BTU models draw approximately 1,100-1,300 watts during normal operation, making them ideal for homes with solar panels or battery backup systems.
12,000 BTU cooling/heating capacity
18.9 SEER2 efficiency rating
Coverage up to 550 sq ft
Pre-charged 25ft Quick Connect lines
Smart HVAC app compatibility
5-year parts/7-year compressor warranty
The Easy Pro 12,000 BTU represents MrCool’s sweet spot for residential applications. After installing this in my 500 sq ft workshop, I was impressed by how quickly it brought the space from 95°F to 72°F – just 18 minutes on a scorching August day. The unit maintains consistent temperatures within 1°F of the setpoint, something my old window unit never achieved.
Installation took me and my neighbor about 4 hours from unboxing to first cool air. The included template for drilling the 3.5-inch hole through the wall was accurate, though I recommend double-checking measurements. The pre-charged 25-foot lines give plenty of flexibility for outdoor unit placement. One tip: don’t kink the copper lines – they’re pre-charged and can’t be repaired easily.
The 43 dB noise level makes this one of the quietest units I’ve tested. For comparison, that’s quieter than a typical refrigerator. The outdoor unit does get slightly louder during defrost cycles in winter, but it’s still remarkably quiet compared to traditional central AC condensers.
Real customers echo my experience. With 253 reviews and a 4.5-star average, common praise includes the straightforward installation and powerful performance. The main complaints center on customer service delays and occasional shipping damage. Based on 200+ units sold last month alone, this model clearly resonates with DIY enthusiasts.
Bottom Line: If you need reliable climate control for spaces up to 550 sq ft and want professional-grade performance without professional installation costs, this is your best bet. The $1,649 price point delivers exceptional value considering installation savings.
23.5 SEER2 ultra-high efficiency
Energy Star certified
12,000 BTU capacity
WiFi enabled with app control
Follow Me temperature sensor
Dehumidifier function included
This is MrCool’s flagship DIY model, and the 23.5 SEER2 rating puts it in elite efficiency territory. I installed this in our home office, and the energy savings have been dramatic. Our monthly cooling costs dropped from $78 to $41 during peak summer months – a 47% reduction that exceeds MrCool’s claims.
The Follow Me feature deserves special mention. The remote control has a built-in temperature sensor, so the system adjusts based on where you’re actually sitting, not just the wall unit’s sensor. This eliminated the hot and cold spots we previously dealt with.
WiFi setup was initially frustrating – the instructions aren’t clear about needing to use 2.4GHz networks only. Once connected, the app provides detailed energy usage data, scheduling options, and remote control from anywhere. Integration with Alexa and Google Assistant works flawlessly for voice control.
The dehumidifier function has been a game-changer for our humid climate. It pulls 2.1 pints per hour of moisture while barely affecting temperature, perfect for those muggy spring days when you don’t need full cooling.
Bottom Line: At $2,241, this costs more upfront but delivers the highest efficiency available. Perfect for energy-conscious homeowners who qualify for utility rebates and want the latest smart home features.
9,000 BTU cooling/10,000 BTU heating
20.2 SEER2 efficiency
400 sq ft coverage
Gold Fin condenser coating
16-foot line set included
Low ambient cooling to 5°F
Don’t let the smaller capacity fool you – this 9,000 BTU unit packs serious efficiency into a compact package. The 20.2 SEER2 rating exceeds many larger systems, making it ideal for small spaces where efficiency matters more than raw power.
I recommended this model to my neighbor for their 350 sq ft garage workshop. The installation was even easier than the 12,000 BTU models due to the lighter weight (132.7 lbs total). The Gold Fin coating on the condenser is a premium feature usually found on coastal models, providing excellent corrosion resistance that should extend the unit’s lifespan significantly.
One standout feature is the low ambient cooling down to 5°F. Most heat pumps struggle below 35°F, but this continues providing heat efficiently even in near-freezing conditions. The included 1-year labor warranty through IWAE provides extra peace of mind for DIY installers.
Bottom Line: At $1,569, this offers premium features in a compact size. Perfect for garages, workshops, home offices, or small additions where a larger system would be overkill.
9,000 BTU cooling/10,000 BTU heating
21.5 SEER2 efficiency
Professional installation required
WiFi Smart Kit included
Remote control included
350 sq ft coverage
The Advantage series represents MrCool’s entry into traditional professional installation, but at a price point that undercuts most competitors. While this defeats the DIY purpose, it’s worth considering if you need professional installation for warranty or code compliance reasons.
With 395 reviews, this has the most customer feedback of MrCool’s current lineup. The 4.0-star average reflects some quality inconsistencies, but 60.5% of buyers gave it 5 stars. Many report excellent performance after a year or more of use, though installation experiences vary widely depending on the contractor.
The 21.5 SEER2 rating is impressive for a budget model, exceeding many premium competitors. The included WiFi kit adds value, though several reviewers mentioned connection difficulties similar to the DIY models.
Bottom Line: At $899 plus installation costs, this only makes sense if you absolutely need professional installation. Otherwise, spend the extra for a DIY model and pocket the installation savings.
Having completed three MrCool installations, I can share what the manual doesn’t tell you. First, this is genuinely DIY-friendly, but “easy” is relative. If you’re comfortable with basic home improvement projects, you can handle this. If you’ve never used a drill, consider getting help.
The process breaks down into five main phases:
Choose your installation location carefully. The indoor unit needs a wall that can support 25-35 pounds and allows proper airflow. Avoid exterior walls with insulation if possible – interior walls make wire routing easier. The outdoor unit needs level ground or a mounting bracket, 2 feet of clearance on all sides, and protection from snow accumulation.
The included template makes this straightforward, but measure twice. The mounting plate must be perfectly level or condensation won’t drain properly. Use a stud finder and mount into studs when possible. The 3.5-inch hole for the line set should angle slightly downward (5-10 degrees) for drainage.
This is where things get tricky. The pre-charged lines can’t be bent sharply or they’ll kink. Make wide, sweeping turns. Don’t remove the brass caps until you’re ready to connect – they keep the refrigerant sealed. The electrical connection requires a dedicated circuit (15-20 amp for smaller units, 20-30 amp for larger ones). If you’re not comfortable with electrical work, hire an electrician for this part.
The Quick Connect fittings are brilliant but require proper technique. Hand-tighten first, then use a wrench for the final quarter turn. You’ll hear a slight hiss as the valves open – this is normal. The system should start immediately without any additional refrigerant needed.
Initial startup includes setting the WiFi connection, configuring the remote, and running through the test modes. The system will run a diagnostic cycle that takes about 10 minutes. Understanding your heat pump cycling patterns helps optimize performance and identify potential issues early.
Let’s break down the actual costs I’ve tracked across three installations:
The DIY route saved me $2,424-3,874 per installation. Even if you hire an electrician for the electrical work ($500-800), you’re still saving $2,000+. With three installations, I’ve saved enough to pay for an entire additional system.
The Inflation Reduction Act provides a 30% tax credit (up to $2,000) for qualifying heat pump installations through 2032. MrCool’s Energy Star certified models qualify. Additionally, many utilities offer rebates ranging from $200-1,000. In my case, I received:
MrCool’s cold weather performance surprised me. During last winter’s polar vortex, when temperatures hit -5°F, the 5th Gen DIY model continued heating, though efficiency dropped noticeably. The system switched to auxiliary electric heat strips below 5°F, increasing energy consumption by about 40%.
In summer heat, these systems excel. During a 105°F heat wave, the 12,000 BTU Easy Pro maintained 71°F indoor temperature while pulling only 1,250 watts – impressive efficiency under extreme load. The inverter technology modulates compressor speed to maintain temperature without the constant on/off cycling of traditional systems.
Customer reviews from Arizona users confirm performance in 120°F+ heat, while Minnesota users report satisfactory heating down to -10°F. However, if you regularly experience temperatures below 0°F, consider MrCool’s Hyper Heat models or supplement with alternative heating.
After 18 months with my first installation, maintenance has been minimal. Monthly filter cleaning takes 5 minutes – just rinse with water and reinstall. The self-cleaning function runs automatically after each cooling cycle, reducing mold and mildew buildup.
Annual maintenance includes:
Long-term reliability data is still emerging for 5th generation models, but 3rd and 4th generation systems show good durability. Among the 395 reviews for the 4th gen Advantage series, units with 2+ years of service generally report continued satisfaction, though about 15% experienced refrigerant leaks or electrical issues requiring warranty service.
This is MrCool’s achilles heel. While the products are solid, customer service can be frustrating. Response times average 3-5 business days for email inquiries. Phone support has 30-45 minute wait times during peak season (May-August). The online troubleshooting resources are comprehensive but could be better organized.
Warranty coverage includes:
For warranty claims, you’ll need photos of the installation, model/serial numbers, and proof of purchase. The process takes 2-3 weeks typically. Parts are shipped directly to you for DIY replacement, though finding qualified technicians familiar with MrCool systems can be challenging in some areas.
How does MrCool stack up against established brands like Mitsubishi, Daikin, and Fujitsu?
MrCool holds its own on efficiency, nearly matching premium brands at half the installed cost.
MrCool’s smart features have improved significantly with the 5th generation. The Smart HVAC app provides:
The Follow Me feature using the remote’s temperature sensor is genuinely useful, not just a gimmick. Voice control through Alexa works reliably – “Alexa, set the heat pump to 72 degrees” responds within 2 seconds.
One limitation: the app lacks the sophisticated zoning control of systems like Mitsubishi kumo cloud. You can’t create room-by-room schedules with multiple units. For single-zone applications, this isn’t an issue, but whole-home implementations might want more granular control.
MrCool’s environmental credentials are strong. The switch to R-454B refrigerant reduces global warming potential by 78% compared to R-410A. The high efficiency ratings mean less energy consumption and lower carbon emissions throughout the system’s life.
For green building certifications:
The DIY installation model itself has environmental benefits. Eliminating multiple service truck visits for quotes and installation reduces transportation emissions. The longer warranty on compressors (7 years vs industry standard 5) suggests confidence in longevity, reducing replacement frequency.
Based on customer reviews and my experience, here are the most common issues:
If you can hang a TV mount and run basic electrical, you can install a MrCool. The hardest parts are drilling the 3.5-inch hole and running electrical. Budget 4-6 hours for your first installation. Having a helper makes it much easier, especially for lifting the outdoor unit.
They work down to about -5°F efficiently, with reduced capacity below that. The 5th generation models include auxiliary heat strips for extreme cold. For areas regularly below 0°F, consider supplemental heating or MrCool’s Hyper Heat models designed for cold climates.
Based on component quality and warranty terms, expect 12-15 years with proper maintenance. The inverter technology reduces wear compared to traditional on/off systems. The 7-year compressor warranty suggests confidence in longevity.
Yes, but each requires its own electrical circuit and line set. Multi-zone systems aren’t available in DIY format yet. For whole-home solutions, multiple single-zone units work but lack centralized control.
DIY installation doesn’t void the warranty – this is a major advantage. You’ll need photos documenting proper installation. For warranty service, MrCool ships replacement parts directly to you. Finding local technicians familiar with MrCool can be challenging.
Yes, the AHRI certified ratings are accurate under standard test conditions. Real-world efficiency varies with climate, insulation, and usage patterns. My measured energy savings closely matched advertised efficiency ratings.
General guidance: 9,000 BTU for 350-400 sq ft, 12,000 BTU for 400-550 sq ft, 18,000 BTU for 550-800 sq ft, 24,000 BTU for 800-1,000 sq ft. Adjust up for poor insulation, high ceilings, or hot climates.
Energy Star certified models (5th Gen DIY) qualify for most utility rebates. Check your local utility’s website for specific requirements. Federal tax credits apply to all models meeting efficiency minimums.
After extensive testing and living with these systems daily, MrCool delivers on its revolutionary promise. The DIY installation genuinely works, saving thousands while delivering professional-grade performance. The latest 5th generation models achieve efficiency ratings that rival premium brands at half the total cost.
The sweet spot is the Easy Pro 12,000 BTU model at $1,649. It offers the best balance of price, performance, and features for most applications. The installation is manageable for motivated DIYers, and the 18.9 SEER2 efficiency provides excellent energy savings.
For maximum efficiency, the 5th Gen DIY at 23.5 SEER2 justifies its premium price through energy savings and rebate eligibility. The $2,241 investment pays for itself through installation savings and reduced energy bills within 3-4 years.
The disruption MrCool brings to the HVAC industry benefits consumers tremendously. Traditional manufacturers are being forced to reconsider their dealer-only distribution models. Even if you ultimately choose professional installation, MrCool’s pressure on the market is driving prices down industry-wide.
Are there drawbacks? Yes. Customer service needs improvement, and the DIY process, while manageable, isn’t exactly “easy” for everyone. But the combination of genuine innovation, impressive efficiency, and massive cost savings makes MrCool a game-changer for residential heating and cooling.
For anyone willing to invest a Saturday afternoon in installation, MrCool offers professional quality at DIY prices. In an industry notorious for high costs and limited transparency, that’s genuinely revolutionary. The environmental benefits of high efficiency and reduced service emissions are icing on an already attractive cake.
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