Should You Plant Shrubs and Trees Near an Outside HVAC Unit?

Landscaping around an outdoor HVAC unit is a common practice that homeowners engage in to mask the unappealing appearance of the unit. While plants can beautify the area and provide shade, it is imperative to consider their impact on the HVAC system's performance. In this article, we will explore the pros and cons of planting shrubs and trees near an outside HVAC unit.

Pros of Planting Shrubs and Trees near an Outside HVAC Unit

There are significant benefits to planting shrubs and trees around an outside HVAC unit, including:

1. Aesthetic Appeal:

Planting a combination of tall and short shrubs and trees can help hide the outdoor unit from view and blend it into the surrounding landscape. In addition, it adds a nice aesthetic touch to the yard and garden.

2. Energy Savings:

Shrubs and trees planted strategically around the HVAC unit can provide natural shade, reducing the amount of heat absorbed by the unit. This can help improve the system's efficiency and save energy, ultimately reducing energy costs.

Cons of Planting Shrubs and Trees near an Outside HVAC Unit

Despite the advantages, planting shrubs and trees near an outside HVAC unit might not be the optimal solution. Consider the following disadvantages:

1. Airflow Restriction:

Plants can obstruct the airflow around the HVAC unit, decreasing the system's ability to function efficiently. Natural debris and leaves from the plant can also enter the system and clog the coils, leading to a system breakdown.

2. Root Damage:

The roots of mature trees and shrubs can damage the outdoor unit's coil or the refrigerant line, and cause reduced airflows, coolant leakage or other mechanical issues.

Recommended Landscaping Tips for Outside HVAC Units

If you must plant trees and shrubs near an outside HVAC unit, follow these tips to avoid potential problems:

1. Choose the Right Plants:

When choosing landscaping plants near your HVAC unit, consider plants that are low maintenance and do not shed leaves or branches often. The ideal plantings should be either evergreen or fast-growing shrubs, such as boxwoods or arborvitaes. These plants will not only provide shade but won't obstruct airflow or damage the unit's components.

2. Distance the Plants from the HVAC Unit:

The recommended distance between the unit and plantings is 2-4 feet from the perimeter of the unit. This spacing not only allows for adequate airflow but also provides access to maintain the unit properly. Regular maintenance ensures that the system operates efficiently and extends its lifespan.

3. Use Mulch:

Adding a layer of mulch around the plants helps retain moisture and prevent weed growth, reducing the need for regular maintenance.

4. Consider a Fence or Trellis:

Erecting a fence or trellis around the outdoor unit can provide privacy and act as a barrier to prevent debris from entering the system. The structure should be at least two feet from the perimeter of the unit.

Conclusion

While landscaping with shrubs and trees around an outside HVAC unit can enhance the property's aesthetics and save energy costs, it can also create potential problems if not planned carefully. In conclusion, if you are considering planting plants around your HVAC unit, it's essential to weigh the potential benefits against these cons and take appropriate measures to protect the unit from potential damage.