Mini Split Sound Blanket: A Comprehensive Guide to Noise Reduction

A mini-split sound blanket is a specialized accessory designed to mitigate the noise generated by the outdoor unit of a mini-split air conditioning or heating system. These blankets are typically made of sound-absorbing materials and are installed around the compressor to dampen the sound waves produced during operation, providing a more peaceful living environment.

Technical Specifications of Mini Split Sound Blankets

When it comes to the technical specifications of mini split sound blankets, two notable products stand out:

  1. Brinmar Universal Water Source Sound Blanket: This blanket features a compressor cover and a 5dB noise reduction rating. It is designed to fit a maximum size of 10″ x 10″ x 19″ high.

  2. MAX/Universal Sound Blanket: This blanket also reduces compressor noise by a minimum of 5dB and is designed to fit a similar size range as the Brinmar blanket.

It’s important to note that the actual noise reduction achieved may vary depending on the specific mini-split unit and the installation conditions. While a compressor blanket can help reduce noise by up to 5dB, it may not completely eliminate it, especially if the unit is already experiencing significant vibration issues.

Effectiveness of Mini Split Sound Blankets

mini split sound blanketImage source: Flickr

The effectiveness of a mini split sound blanket in reducing noise can be influenced by several factors:

  1. Noise Reduction Rating: The noise reduction rating, typically measured in decibels (dB), indicates the level of sound attenuation the blanket can provide. A higher rating generally corresponds to a more effective noise reduction.

  2. Fit and Installation: Proper installation of the blanket, ensuring a snug and secure fit around the compressor, is crucial for maximizing its noise-dampening capabilities.

  3. Existing Vibration Issues: If the mini-split unit is already experiencing significant vibration problems, the compressor blanket may not be able to fully address the noise, as the vibrations can still contribute to the overall sound output.

DIY Installation of Mini Split Sound Blankets

It is possible for a homeowner to install a compressor blanket themselves, although it may require some technical knowledge and skill. The installation process typically involves the following steps:

  1. Measuring the Outdoor Unit: Accurately measure the dimensions of the outdoor unit to ensure the selected compressor blanket will fit properly.

  2. Cutting Slits in the Blanket: Carefully cut slits or openings in the blanket to accommodate the various components of the outdoor unit, such as the refrigerant lines, electrical connections, and drainage.

  3. Securing the Blanket: Use the provided fasteners, such as Velcro strips or adhesive tape, to securely attach the blanket around the compressor and other necessary areas.

  4. Ensuring Airflow: Make sure the blanket does not obstruct the airflow around the outdoor unit, as this could impact the system’s efficiency and performance.

Professional Installation of Mini Split Sound Blankets

If the homeowner is not comfortable with the DIY installation process, it is also possible to hire a professional HVAC technician to install the compressor blanket. Some HVAC companies may offer this service, while others may not. In such cases, the homeowner may need to purchase the blanket separately and then hire a professional to handle the installation.

Factors to Consider When Choosing a Mini Split Sound Blanket

When selecting a mini split sound blanket, there are several factors to consider:

  1. Noise Reduction Rating: As mentioned earlier, the noise reduction rating is a crucial factor in determining the effectiveness of the blanket.

  2. Fit and Compatibility: Ensure that the selected blanket is designed to fit the specific dimensions of your outdoor mini-split unit.

  3. Material and Construction: Look for blankets made of high-quality, sound-absorbing materials that are durable and weather-resistant.

  4. Ease of Installation: Consider the complexity of the installation process and whether it aligns with your DIY skills or requires professional assistance.

  5. Warranty and Manufacturer Support: Check the warranty coverage and the availability of manufacturer support in case of any issues or questions.

By carefully considering these factors, you can choose the most suitable mini split sound blanket to effectively reduce the noise generated by your outdoor unit and create a more peaceful living environment.


A mini split sound blanket is a valuable accessory for homeowners looking to mitigate the noise generated by their outdoor mini-split air conditioning or heating system. These blankets, made of sound-absorbing materials, can provide up to 5dB of noise reduction when installed correctly around the compressor. While they may not completely eliminate the noise, they can significantly improve the overall sound levels, contributing to a more comfortable and peaceful living space.

Whether you choose to install the blanket yourself or hire a professional, it’s essential to carefully consider the technical specifications, effectiveness, and installation requirements to ensure the best possible noise reduction for your mini-split system.