Where to place a mini split (and where not to)
Looking for the best place to install your mini split? Choosing the right location is essential for maximizing its efficiency and ensuring long-term performance. In this article, we’ll explore the best spots to install your indoor AC unit and outdoor AC unit, as well as the areas you should avoid to prevent common issues, like sunlight exposure or rooms with poor insulation. But please remember, always seek the advice of a trained professional when considering installation or maintenance.
Why Placement Matters
The Air-Conditioning, Heating, and Refrigeration Institute (AHRI) highlights that proper installation, including accurate placement, is crucial for the optimal performance and longevity of air conditioning systems. A well-placed unit can optimize airflow and reduce energy consumption, while improper location can lead to higher bills.
In the following sections, we’ll explore key considerations for a mini split placement, helping you spot the good locations from the bad ones.
Indoor Units
The indoor unit is responsible for removing unwanted heat from the indoor air and circulating air throughout your space (as well as much more). Thanks to their slim tubing and cable connections, mini split indoor units offer versatile placement options, especially when compared to other AC systems like ducted.
Best Indoor Locations for Mini Split Units
Wall Placement and Height Recommendations
How much clearance does a mini split need? Positioning the indoor unit on a central wall, approximately 6-8 feet (180-240 cm) above the floor and leaving some space around the unit as well, helps distribute air throughout the room. Correct wall placement also prevents air from blowing directly onto people, which is sometimes desired but not if the sensation is constant.
Air Distribution and Coverage Optimization
To ensure optimal coverage, place the unit where it can circulate air freely without obstructions. Try avoiding placing it too close to the ceiling, as this can obstruct airflow and reduce efficiency. For larger rooms, positioning the unit in the middle of a wall can also minimize temperature variations.
Avoiding Obstructions: Furniture and Appliances
Similarly, keep the area around the indoor unit clear of furniture and other items that may block airflow. Obstructions can cause irregular temperature distribution and force the system to work harder, increasing energy consumption. Maintain at least a few feet (or centimeters) of clearance around the unit. Additionally, avoid placing the unit in corners or behind furniture.
Accessibility for Maintenance and Cleaning
It is recommended to clean or replace your filters every month or two depending on how often you use it, that’s why selecting an easily accessible location for your mini split unit is also essential. A well-placed unit makes maintenance easier not only for you, but also for your AC technician, saving time and effort. Regular cleaning not only helps prevent common AC issues, but also ensures a clean and healthy space.
Ideal Room Choices
Not all rooms are right for an AC, as some do not get used the same way or need as much cooling/heating. Here’s a list of the best rooms to choose:
- Mini split in bedrooms: Quiet operation and precise temperature control make mini splits perfect for restful sleep.
- Mini split in living rooms: As a central gathering space, living rooms can benefit from its use.
- Mini split in home offices: Proper mini split placement ensures a comfortable work environment that can enhance productivity.
Indoor Areas to Avoid for Mini Split Installation
Near Heat Sources
Installing your AC unit near heat sources, such as ovens, radiators, or even direct sunlight from windows, can interfere with the system’s ability to regulate room temperature. The heat can cause the unit to overwork, resulting in higher energy bills. One of the most common mistakes when looking for the best placement for a mini split.
Over Doors or High-Traffic Areas
Positioning your mini split over doors or in busy “walkways” might seem logical, but it can result in irregular cooling as the constant airflow disruptions caused by people passing through can impact the unit’s performance, as well as opening and closing doors frequently.
Close to Electronics or Sensitive Equipment
Think twice before installing the unit near electronics such as televisions, computers, or other heat-sensitive devices. Mini splits can produce airflow and slight temperature fluctuations that may impact the performance of these devices.
Rooms with Poor Insulation
The insulation of a room is a factor worth considering when choosing the best place to install a mini split, as poor insulation can force the system to work harder to maintain the desired temperature. Insulation also helps conserve indoor air quality by reducing the infiltration of outdoor pollutants. As a first step, check your doors and windows for any gaps that could let the air out.
Rooms You Should Avoid
While mini splits are versatile, some rooms are not ideal for installation due to temperature fluctuations or other inefficiencies:
- Mini split in kitchens: Heat from cooking can interfere with the system’s efficiency and lead to unnecessary energy use.
- Mini split in corridors: As a passageway, a corridor does not require direct heating or cooling. Additionally, frequent movement of people causes temperature fluctuations, making it an inefficient space for a mini split.
- Mini split in basements: High humidity levels and lack of ventilation can reduce the unit’s performance and longevity.
Outdoor Units
A mini split outdoor unit placement is just as important as the indoor one. In this section, we will dive into the best practices for positioning the mini split outdoor unit and what to consider when choosing the ideal location.
Best Outdoor Locations for Mini Split Units
Choosing the right spot for your mini split outdoor unit requires careful consideration to avoid environmental factors that can reduce efficiency or cause damage. Here are the key elements you should keep in mind.
Stable Ground Support for Outdoor Units
Uneven ground can cause damage to the system because of vibrations, leading to damage over time. The outdoor unit needs a stable, level surface to work properly and to avoid long-term issues.
Outdoor Units Installed on Exterior Walls
Installing the outdoor unit on an exterior wall can be a practical option, especially for homes with limited ground-level space. However, ensure that the installation doesn’t obstruct air intake or get excessively exposed to the sun.
Airflow Requirements and Clearance Guidelines
As mentioned before, outdoor units need sufficient airflow to prevent the compressor from overheating. Make sure there is enough clearance around the unit for air to flow freely, both for intake and exhaust. Avoid placing it too close to any objects that could obstruct airflow. Typically, there should be at least 1-3 feet of clearance on all sides.
Protection from Weather: Wind, Snow, and Rain
While mini split outdoor units are built to withstand some weather conditions, they still require protection from strong winds, heavy snow, or excessive rain. Installing the outdoor unit in a sheltered area can help further protect it from harsh weather.
Keeping Units Away from Debris and Plants
To avoid clogging the filters and damaging the system, keep the area around the outdoor unit free of debris, such as leaves, dirt, and twigs. Overhanging branches or nearby plants can also obstruct airflow and contribute to blockages.
Outdoor Areas to Avoid for Mini Split Installation
Choosing the right outdoor location for your mini split unit is essential, that’s why there are certain areas that should be avoided. These spaces may expose the system to conditions that could negatively impact its function and lifespan.
Direct Sunlight Exposure
Direct exposure to sunlight can increase the temperature of the outdoor unit, causing it to overheat and work harder to cool the space. It’s best to install the unit in a shaded area or provide a sunshade to protect it from prolonged sun exposure.
Areas with Heavy Dust or Pollutants
Placing your mini split in an area prone to dust, dirt, or environmental pollutants can clog the unit’s filters and components, leading to frequent maintenance. Avoid areas with too much foliage, construction sites, or other places that produce high levels of dust and debris.
Near Neighboring Walls or Fences
How far should it be from a wall? If installing the outdoor unit on the ground, avoid doing so too close to walls or fences, as this can block airflow. As mentioned before, make sure the unit has enough space around it for air circulation and proper ventilation.
Areas Prone to Flooding or Water Accumulation
Avoid placing the unit in areas that are susceptible to flooding or water accumulation, as water damage can severely affect the system's performance. Look for elevated spots or areas with proper drainage to prevent water from pooling around the unit.
FAQ
- What’s the best place to install a mini split? The best place to install a mini split is usually in areas where people gather, such as the dining room or lounge. Because they’re often larger and potentially less obstructed by furniture, the system can distribute air more evenly throughout the room.
- Where should you not install a mini split? Avoid installing a mini split in rooms with poor insulation, direct sunlight exposure, or areas where airflow is restricted by furniture or walls. For indoor units, it’s best to stay clear of corners or high-traffic areas that could interfere with airflow. Additionally, avoid spaces that require excessive cooling or heating, like kitchens or near appliances that produce heat.
The Importance of Your Mini Split Placement
Proper mini split placement will help your AC stay in top condition. A well-positioned unit ensures even airflow, reduces strain on the system, and helps maintain a consistent temperature throughout your space. On the other hand, poor placement can lead to uneven cooling, higher energy bills, and increased maintenance needs. Taking the time to carefully plan your mini split installation now can prevent future issues.
Whether you're installing a new unit or repositioning an existing one, consulting with a professional will help you consider all the key factors (such as insulation, airflow, and accessibility) to get the best results.
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