Best Affordable DIY Mini Split Systems for Efficient Home Cooling and Heating 2025

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If you’re looking for an affordable and efficient solution to cool and heat your space, DIY mini split systems offer a versatile and energy-saving option. These systems are ideal for rooms ranging from small sunrooms to larger living areas without complex ductwork. Below is a summary table of five of the best and cheapest DIY mini split products available on Amazon, selected for their performance, ease of installation, and value.

Product Name BTU Capacity Key Feature Amazon Link
MrCool Easy Pro 12k BTU 19.5 SEER2 Ductless Heat Pump 9K-12K BTU Heat pump with 16ft lineset, 1-year labor warranty View on Amazon
MRCOOL Easy Pro 12,000 BTU Ductless Mini-Split Heat Pump 12,000 BTU Smart WiFi control and quiet operation View on Amazon
SMOQIO Mini Split Line Set Cover 3 Inch 10Ft Supports 7,000-24,000 BTU Systems Easy to install protective PVC cover kit View on Amazon
MRCOOL DIY 24k BTU 20.5 SEER Ductless Mini Split AC & Heat Pump 24,000 BTU Energy Star certified, 25ft quick connect line View on Amazon
MRCOOL Ductless Mini-Split AC 36,000 BTU WiFi Smart DIY 36,000 BTU Low ambient cooling, remote & sleep mode View on Amazon

MrCool Easy Pro 12k BTU 19.5 SEER2 Ductless Heat Pump

MrCool Easy Pro 12k BTU 19.5 SEER2 Ductless Heat Pump

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The MrCool Easy Pro 12k BTU system offers a highly efficient heating and cooling solution with an 18.9 to 20.2 SEER2 rating. Its heat pump capability means you can easily transition between seasons, maintaining comfort year-round with an 11.2 HSPF2 heating efficiency rating.

This system cools or heats spaces under 1,200 square feet, such as garages, game rooms, or sunrooms, making it versatile for mixed-use areas. It includes a 16-foot pre-charged line set for quicker installation without additional refrigeration work.

Durability is enhanced by a Gold Fin condenser coating, protecting against corrosion and rust to ensure longevity and optimal heat transfer. Plus, it comes with a 1-year labor warranty, providing peace of mind for DIY installers.

MRCOOL Easy Pro 12,000 BTU Mini Split Heat Pump with WiFi

MRCOOL Easy Pro 12,000 BTU Mini Split Heat Pump

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This 12,000 BTU MRCOOL Easy Pro mini split combines sleek technology with practical features. The inclusion of smart WiFi control allows for remote operation and integration with smart home systems.

It cools or heats spaces up to 550 square feet, which is perfect for bedrooms or small offices. The unit operates quietly, providing efficient climate control without disturbing your routine.

Installation is designed for DIY users with streamlined steps that reduce mess and risk, lowering both installation time and cost. Its inverter-driven compressor provides consistent, energy-efficient comfort.

SMOQIO Mini Split Line Set Cover 3 Inch 10Ft – Easy Installation

SMOQIO Mini Split Line Set Cover

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The SMOQIO Line Set Cover is an accessory that complements DIY mini split installations by offering a clean, protective cover for your system’s copper lines. It fits systems with BTUs ranging from 7,000 to 24,000, suitable for various mini split models.

Its two-piece PVC design is paintable and easy to install, allowing users to blend the cover seamlessly with exterior home colors while protecting pipes from weather, UV exposure, pests, and mechanical damage.

The kit comes with clear instructions for quick setup and is designed for easy removal to facilitate maintenance or repairs, helping extend your mini split system’s lifespan.

MRCOOL DIY 24k BTU 20.5 SEER Ductless Mini Split AC & Heat Pump

MRCOOL DIY 24k BTU Ductless Mini Split AC

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This 24,000 BTU system from MRCOOL boasts exceptional efficiency with a 20.5 SEER2 rating, utilizing variable speed DC inverter compressor technology for energy savings and quieter operation.

It’s designed for easy DIY installation with a pre-charged 25-foot quick-connect line set, eliminating the need for special tools or refrigerant handling. The system efficiently conditions spaces up to 1,000 square feet.

As an Energy Star certified unit, it balances powerful climate control with affordable energy consumption, making it a strong contender for medium to larger rooms.

MRCOOL 36,000 BTU WiFi Smart DIY Mini-Split Air Conditioner

MRCOOL 36,000 BTU WiFi Smart DIY Mini-Split

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This 36,000 BTU unit is MRCOOL’s powerful option for larger spaces up to 1,500 square feet. Equipped with advanced features, it includes a low refrigerant alarm and air filter cleaning alerts to maintain system health and air quality.

The included WiFi smart control lets users manage temperature and settings remotely, while a sleep mode enhances energy efficiency during nighttime.

This model offers low ambient cooling capabilities, operating efficiently even at outdoor temperatures as low as 5°F, making it reliable in cooler climates.

Buying Guide: How to Choose the Best Cheap DIY Mini Split System

Choosing the right DIY mini split system involves evaluating several key factors:

1. Cooling and Heating Capacity (BTU)

Assess the size of the space you want to condition. Smaller rooms (up to about 600 sq ft) require systems with 9,000-12,000 BTU while larger rooms (up to 1,500 sq ft) need 24,000-36,000 BTU units. Oversizing or undersizing affects comfort and efficiency.

2. Energy Efficiency Ratings

Look for a high Seasonal Energy Efficiency Ratio (SEER) and Heating Seasonal Performance Factor (HSPF). Higher ratings translate to lower energy usage and reduced utility costs.

3. Ease of Installation

DIY installation requires user-friendly features such as pre-charged linesets and quick-connect fittings. Systems designed with straightforward, tool-free setup reduce labor costs and complex procedures.

4. Smart Features and Controls

WiFi connectivity and smart home integration improve convenience, allowing remote temperature adjustments and scheduling which can optimize system usage and save energy.

5. Durability and Warranty

Materials like corrosion-resistant coatings extend equipment longevity. Additionally, check warranty terms for labor and parts coverage, which offer protection against defects and installation mishaps during the DIY process.

6. Noise Levels

Quieter operation is essential for bedrooms and living areas. Inverter compressor technology usually supports quieter performance compared to traditional compressors.

7. Accessories and Components

Consider additional items like line set covers for protection and aesthetic appeal. These accessories help maintain functionality and appearance over time.

By carefully considering these perspectives, you can select the best affordable DIY mini split that meets your specific heating and cooling needs while fitting your budget and installation capabilities.

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