Ductless mini-splits offer homeowners a flexible way to heat and cool individual rooms or areas of a home. Because they don’t rely on traditional ductwork, they can be especially useful for additions, older homes, finished basements, garages, and spaces that are difficult to keep comfortable with an existing HVAC system.
However, choosing a mini-split is only part of the process. Where the indoor and outdoor units are installed can have a major impact on comfort and performance.
Here are some of the best places to install a mini-split and what should be considered when choosing a location.
A ductless mini-split works by delivering conditioned air directly into the room rather than through a network of ducts. Because of this, the location of the indoor unit affects how effectively that air moves throughout the space.
A good installation location generally provides:
The exact requirements vary by equipment, which is why installation should follow the manufacturer’s specifications.
Large gathering spaces are often excellent candidates for ductless heating and cooling.
A mini-split installed in a living room or family room can provide direct temperature control in one of the most frequently used areas of the home.
The indoor unit is typically positioned high enough on a wall to distribute conditioned air throughout the room while remaining clear of furniture and other obstructions.
Open floor plans may also allow a single indoor unit to serve a larger connected area, although the home’s layout and heating and cooling requirements need to be evaluated before determining how much space one unit can effectively handle.
Bedrooms can benefit from the individual temperature control provided by a mini-split system.
With a multi-zone system, different bedrooms may have their own indoor units and temperature settings. That allows household members to adjust their individual spaces without changing the temperature throughout the entire house.
Placement is particularly important in bedrooms. You generally don’t want conditioned air blowing directly onto the bed throughout the night. Instead, the unit should be positioned to promote even circulation throughout the room.
Room additions are one of the most practical applications for a ductless mini-split system.
Extending an existing home’s ductwork into a new addition isn’t always practical. Even when it is possible, the existing HVAC equipment may not have been sized to handle the additional space.
A mini-split provides dedicated heating and cooling without necessarily requiring extensive modifications to the home’s existing duct system.
This can work well for:
Before choosing equipment, the new area’s insulation, windows, square footage, and other characteristics should be considered.
Older Belleville and Metro East homes may have been built without the ductwork needed for conventional central air conditioning.
Installing ducts in an existing home can sometimes require significant modifications to walls, ceilings, closets, or other areas. A mini-split can provide another option.
Because only a relatively small connection is needed between the indoor and outdoor equipment, mini-split installation can provide modern heating and cooling while minimizing the need for extensive ductwork.
This makes ductless equipment worth considering when updating older homes while trying to preserve their existing layout and character.
Basements often have different heating and cooling requirements than the rest of the house.
A finished basement may stay naturally cooler during summer but need additional heat during winter. Other basements can become uncomfortable or humid depending on their construction and conditions.
A properly sized mini-split gives the basement its own temperature control rather than relying entirely on the home’s main HVAC system.
This can be particularly useful when a basement has been converted into a family room, office, guest suite, or other regularly occupied living space.
Upper-level bonus rooms and finished attics can be difficult to keep comfortable.
Heat naturally accumulates in upper areas of a home, and these rooms may also have roof exposure, limited insulation, or inadequate airflow from the existing HVAC system.
Installing a mini-split can provide dedicated cooling during summer and supplemental or primary heating during colder weather, depending on the equipment and application.
If you regularly use a garage as a workshop, hobby area, exercise room, or other occupied space, a mini-split may make it more comfortable.
However, the space should first be evaluated for insulation, air leakage, and intended use. Trying to heat or cool a poorly insulated garage can place unnecessary demand on the equipment.
The type of work performed in the garage also matters. Dust, fumes, chemicals, and other contaminants may affect whether a particular HVAC solution is appropriate.
More homeowners are using spare bedrooms, converted areas, and additions as dedicated offices.
If your home office consistently runs hotter or colder than the rest of your house, adjusting the thermostat for the entire home isn’t always an efficient solution.
A mini-split can provide independent temperature control for the office, allowing you to keep the workspace comfortable without significantly changing conditions elsewhere in the house.
Even after you’ve identified the room, the specific location within that room matters.
Indoor units generally need to be positioned where air can circulate freely throughout the space.
Avoid locations where airflow may be blocked by:
You should also consider how the air will travel across the room. Simply choosing the least noticeable wall isn’t necessarily the best option.
A professional installer can balance performance, accessibility, appearance, and the manufacturer’s clearance requirements when selecting the location.
The outdoor equipment needs careful placement as well.
It requires sufficient airflow and should be installed according to manufacturer clearance requirements. The location also needs to account for drainage, service access, weather exposure, and the connection to the indoor equipment.
In the Metro East, winter conditions should also be considered. Snow, ice, leaves, and other debris shouldn’t be allowed to obstruct the unit.
The shortest possible distance between indoor and outdoor equipment isn’t automatically the best installation. The entire system needs to be planned together.
It depends on the home’s layout and the system.
One indoor unit may effectively serve an open area, but walls and closed doors can limit how well conditioned air reaches separate rooms.
For homes requiring independent control in several rooms, a multi-zone mini-split system may be more appropriate. Multiple indoor units can be connected to compatible outdoor equipment, allowing different areas of the home to have their own temperature control.
A professional load calculation and evaluation of the home’s layout can determine how many indoor units are appropriate.
Mini-split placement shouldn’t be based solely on where the equipment looks best or where installation seems easiest.
Room size, insulation, windows, sun exposure, ceiling height, airflow, household use, and the location of the outdoor equipment can all influence the decision.
Ehret Inc. provides professional ductless mini-split installation in Belleville, IL and throughout the Metro East. Our HVAC professionals can evaluate your home, determine the appropriate system size, and recommend indoor and outdoor unit locations designed to provide effective heating and cooling.
If you’re considering adding ductless heating and cooling to your home, call (618) 233-1018 or schedule service online to discuss your options.
