A DIY mini split can make a room, garage, or addition more comfortable without extending ductwork—but “DIY” does not mean every part of the job is simple. Compare the installation method, electrical requirements, room-size guidance, and warranty before choosing. The picks below range from fast-connect models designed to simplify installation to a conventional system that requires professional HVAC installation.
| System | Capacity | Power | Installation notes | Best for |
|---|---|---|---|---|
| Albott 12,000 BTU Fast-Fit Mini Split | 12,000 BTU; listed for up to 750 sq. ft. | 115V | Pre-wired indoor unit; no vacuuming or extra testing claimed | DIY shoppers who want a fast-connect setup |
| Albott Easy DIY Series Mini Split | 12,000 BTU; listed for up to 750 sq. ft. | 115V | Pre-wired indoor unit; outdoor unit does not require vacuuming | Buyers who want simplified setup and multiple operating modes |
| MRCOOL DIY Select 12,000 BTU | 12,000 BTU; listed for 500–1,200 sq. ft. | Not specified in supplied product details | Pre-charged 11.5-foot quick-connect line set | DIY buyers who need a longer stated coverage range |
| MRCOOL DIY Select 24,000 BTU | 24,000 BTU; listed for up to 1,050 sq. ft. | 230V | Pre-charged Quick Connect line set; no-vacuum installation described | Larger rooms with compatible 230V power |
| Rellytech 12,000 BTU Mini Split | 12,000 BTU; listed for up to 750 sq. ft. | 115V/110V | Professional HVAC installation required | Shoppers comparing a conventional professionally installed option |
Table of Contents
Our Picks: Best Diy Mini Split System reviews
1. Albott Fast-Fit: A 115V System with a Streamlined Setup
This Albott is a single-zone, 12,000 BTU ductless heat pump designed for cooling and heating spaces the listing says are up to 750 square feet. Its 115V specification may suit homes where a 230V system is not the right fit, but you should still confirm the required circuit and electrical setup before ordering.
The main installation draw is the fast-fit design: the indoor unit comes pre-wired, and the description says the system does not require vacuuming or extra testing. It also includes a step-by-step guide and installation video. Those features can reduce some of the specialized work, but they do not remove the need to follow the manual, check local requirements, and be comfortable with the mounting and electrical steps.
For day-to-day use, the system offers cooling, heating, a 24-hour timer, sleep mode, remote control, and smart app control. The listed temperature setting range is 61°F to 90°F, and its 18 SEER2 rating gives shoppers an efficiency figure to compare with other models. The listing also specifies operation from 5°F to 122°F, although actual performance depends on the installation and conditions.
One practical drawback is that a power cord is not included, since installation requirements vary. Factor that into your planning rather than assuming it is ready to plug in. The warranty is listed as five years for the compressor and eight years for parts, which is longer on parts than the second Albott pick.
Pros:
- 115V, 12,000 BTU design listed for spaces up to 750 square feet
- Pre-wired indoor unit and fast-fit installation approach
- Heating, cooling, app control, sleep mode, and timer
- Five-year compressor and eight-year parts warranty listed
Cons:
- Power cord is not included
- Its installation claims do not replace checking electrical and local code requirements
Verdict: Choose this Albott if you want a 115V fast-connect system with app control and a relatively long listed parts warranty, and you have verified that its installation requirements fit your project.
2. Albott Easy DIY Series: Simple Setup with Four Operating Modes
This 12,000 BTU Albott is another 115V heat-pump system listed for rooms up to 750 square feet. It has an 18 SEER2 rating and offers cooling, heating, dehumidifying, and fan modes. The temperature range is listed as 61°F to 90°F, with sleep mode and a 24-hour timer for scheduled operation.
The indoor unit comes pre-wired, and the product description says the outdoor unit does not require vacuuming. That can make setup less involved than a system that requires conventional refrigerant-line preparation. The manufacturer still recommends professional help for people without basic skills, an important qualification for anyone comparing it with systems marketed as fully do-it-yourself.
Maintenance features include removable filters, a self-cleaning function, and detachable air blades for cleaning. The warranty is listed as five years for the compressor and seven years for parts. Compared with the other Albott model here, it has a one-year-shorter parts warranty based on the supplied details, so compare the warranty terms along with the installation method.
Pros:
- Pre-wired indoor unit and no-vacuum outdoor setup described
- Four operating modes, including dehumidifying
- Listed for spaces up to 750 square feet
- Removable filters and detachable air blades simplify routine cleaning
Cons:
- Professional help is recommended for those without basic installation skills
- Seven-year parts warranty is shorter than the other Albott option listed here
Verdict: This is a sensible alternative to the Fast-Fit Albott if dehumidifying mode and the stated no-vacuum setup appeal to you, but plan on professional help if you are not confident in the installation.
3. MRCOOL DIY Select 12,000 BTU: Quick-Connect Line Set Included
This MRCOOL DIY Select is a single-zone system with a 12,000 BTU capacity. Unlike the Albott models, whose stated coverage tops out at 750 square feet, this model is listed for spaces from 500 to 1,200 square feet. That broad range makes it especially important to check the room layout, insulation, climate, and manufacturer sizing guidance instead of choosing by square footage alone.
The system includes an 11.5-foot pre-charged quick-connect line set, so the product description says you do not need to handle refrigerant or use a vacuum pump for the connection. Check the line-set length against the planned locations of the indoor and outdoor units before you buy; a quick-connect system still needs a suitable path between them.
Its inverter compressor adjusts output to help maintain a steady indoor temperature. The supplied specifications list 17.5–16.5 SEER2 cooling efficiency and 8.8–8.3 HSPF2 heating performance. Wi-Fi capability through the MRCOOL Comfort App and an included remote add control options. The supplied details do not state its voltage, so verify the electrical requirements with the manufacturer before purchase.
Pros:
- Pre-charged 11.5-foot quick-connect line set included
- Listed coverage range of 500 to 1,200 square feet
- Inverter operation and app-based control
- Provides both cooling and heating
Cons:
- Voltage is not specified in the supplied product details
- The 11.5-foot line set may not suit every installation layout
Verdict: Consider this MRCOOL if its stated coverage range and included line-set length match your room and layout; confirm voltage and installation requirements before committing.
4. MRCOOL DIY Select 24,000 BTU: Higher Capacity for Larger Rooms
This 24,000 BTU MRCOOL is the higher-capacity pick in this group. It is listed for rooms up to 1,050 square feet and uses 230V power, so it is aimed at larger spaces with compatible electrical service. Do not assume that more capacity is automatically better: use the manufacturer’s sizing guidance and account for the room’s layout and conditions.
The DIY setup includes a pre-charged Quick Connect line set. The description says that the connection avoids the need for a vacuum pump, gauges, brazing, or refrigerant handling. Even with those steps removed, plan the unit locations and line route carefully, and confirm what electrical and mounting work your installation requires.
The inverter system is listed at up to 16.5 SEER2 for cooling and up to 8.3 HSPF2 for heating. It also has app control and voice-assistant compatibility. The product description gives a silent-mode figure as low as 21.5 dB(A), which may be useful to shoppers considering a bedroom or quiet work area, though sound can vary with operating conditions.
Pros:
- 24,000 BTU capacity listed for spaces up to 1,050 square feet
- Pre-charged Quick Connect line set and no-vacuum installation approach
- App and voice-assistant control options
- Inverter compressor and a stated silent-mode sound figure
Cons:
- Requires 230V power
- Its greater capacity may be unnecessary for smaller rooms
Verdict: Pick this MRCOOL for a larger, properly sized space where 230V service is available; for a smaller room, compare the 12,000 BTU options instead.
5. Rellytech 12,000 BTU: A Conventional Option That Requires Professional Installation
The Rellytech is a 12,000 BTU ductless air conditioner and heat pump listed for spaces up to 750 square feet. Its 19 SEER2 rating and 8.5 HSPF2 figure offer comparison points for efficiency, while cooling, heating, fan, and dry modes cover common year-round needs. The product details list 115V/110V power and a temperature setting range of 61°F to 88°F.
Unlike the other systems in this guide, this model’s description specifically says professional HVAC installation is required. That makes it a less direct match for someone seeking a DIY project, but it may suit shoppers who prefer to have an installer handle the work. It is described as ETL and AHRI certified, and the listed warranty is eight years.
Other listed features include ECO mode, four fan speeds, a 90-degree vertical swing, sleep mode, a 24-hour timer, and an LED-off function. The stated sound level is 42 dB. The product information provided for this article marks the listing as unavailable, so check its current status before planning around this model.
Pros:
- 12,000 BTU capacity listed for spaces up to 750 square feet
- 19 SEER2 and 8.5 HSPF2 figures listed
- Multiple operating modes, fan speeds, and timer settings
- Eight-year warranty listed
Cons:
- Professional HVAC installation is required, so it is not a true DIY choice
- Listing is marked unavailable in the supplied product information
Verdict: Keep the Rellytech on your comparison list only if you are comfortable hiring an HVAC installer and can confirm the product is available.
How to Choose a DIY Mini Split System
Size the system for your space
Start with the manufacturer’s sizing guidance, not just a rough BTU-per-square-foot estimate. Room area matters, but so do the layout, insulation, ceiling height, windows, and local conditions. The models here range from 12,000 to 24,000 BTU, with different stated coverage ranges. If you are unsure, ask a qualified HVAC professional to help size the system before ordering.
Check voltage and electrical needs
Confirm the system’s voltage and electrical requirements against your home before you buy. The Albott models are listed as 115V, and the larger MRCOOL is listed as 230V. The 12,000 BTU MRCOOL’s supplied details do not state its voltage, so verify that information with the manufacturer. Do not assume that a voltage label means your existing circuit is suitable.
Understand what “DIY” installation includes
Fast-connect fittings, pre-wired components, and pre-charged line sets can reduce some installation steps, but they do not make every project identical. Review the full installation manual, required tools, mounting instructions, line-set limitations, and electrical steps. The Albott Easy DIY description recommends professional help for people without basic skills, while the Rellytech explicitly requires professional HVAC installation.
Measure the line route and installation locations
Before choosing a system, plan where the indoor and outdoor units will go and measure the route between them. One MRCOOL option includes an 11.5-foot line set; check whether that length suits your layout. Also consider how you will mount the indoor unit and route the lines through the wall. A product’s quick-connect design does not guarantee that it will fit every home or project.
Compare efficiency figures carefully
SEER2 describes cooling efficiency, while HSPF2 is used for heating efficiency. Compare both figures when they are available, but do not treat the highest number as the only factor. Installation quality, correct sizing, usage, and the conditions in your home affect how a system performs. Some supplied product descriptions do not list every efficiency measure, so verify specifications when making a close comparison.
Consider controls, noise, and maintenance
Think about how you want to operate the system. Some picks include an app, voice-assistant controls, a remote, timer, sleep mode, or dehumidifying function. Check which features are included on the exact model you are considering. Removable filters and accessible air blades can also make routine cleaning easier. Sound figures are useful comparison points, but your experience can depend on the setting and installation.
Read the warranty and check what is included
Compare compressor and parts coverage separately, and review the warranty terms before purchase. Warranty lengths differ among the listed products. Also check what arrives in the box: the first Albott description says the power cord is not included, and line-set details vary by model. Confirm the product listing and installation documentation for the complete included-parts list.
Check local rules before starting
Permits and installation rules can vary by location. Before starting work, check local requirements and confirm which tasks you are allowed and equipped to perform. If electrical work, wall penetration, mounting, or system connections are outside your skill level, hire a qualified professional for those steps.
FAQs
Can I install a DIY mini split without an HVAC technician?
It depends on the system and your skills. Some models use pre-wired components or quick-connect, pre-charged line sets to reduce installation steps. They still require careful work, and some product descriptions recommend or require professional help. Read the manual and check local rules before deciding.
What size mini split do I need?
Match capacity to your space using the manufacturer’s sizing guidance. The listings give different coverage estimates, but room area alone may not account for layout, insulation, windows, or local conditions. Seek professional sizing advice if you are uncertain.
Is a 115V mini split easier to install than a 230V model?
Voltage by itself does not determine how easy the full installation will be. It does affect electrical compatibility, so check the system’s requirements and your available service. Have a qualified electrician assess the circuit if needed.
Do all the systems here heat as well as cool?
The Albott models, both MRCOOL models, and the Rellytech are described as providing heating and cooling. Features and published specifications differ by model, so check the exact listing before buying.
What does a pre-charged line set do?
A pre-charged line set contains refrigerant and is designed to connect to a compatible system without the same refrigerant-handling steps described for conventional setups. Follow the product instructions closely and confirm the included line length fits your planned installation.
Which system is the best fit for a larger room?
The 24,000 BTU MRCOOL is listed for spaces up to 1,050 square feet, while the 12,000 BTU MRCOOL has a stated range of 500 to 1,200 square feet. Those figures are product claims, not a substitute for sizing the system to your room and conditions.
Is the Rellytech a DIY mini split?
It is not a DIY installation pick according to its supplied product description, which says professional HVAC installation is required. It is included as a comparison option for shoppers who plan to hire an installer.
Conclusion
For a straightforward starting point, the Albott Fast-Fit stands out for its 115V specification, pre-wired indoor unit, and described no-vacuum setup. The Albott Easy DIY Series adds dehumidifying mode, while the MRCOOL DIY Select models offer quick-connect line sets in two capacities. Choose based on proper sizing, electrical fit, installation confidence, and warranty details—not capacity alone. If any installation step is beyond your skills or local rules, bring in a qualified professional.
