When installing a split air conditioning system, one of the most common and cost-effective setups is the back-to-back AC installation. This guide will explain what a back-to-back air conditioning installation is, the different types, and what factors to consider when planning your air conditioning setup.
What is a Back-to-Back Air Conditioning Installation?
A back-to-back installation is a specific method used in air conditioning installation services where the indoor and outdoor units of a split-system air conditioner are positioned on the same wall—with the indoor unit mounted on the internal side of the wall and the outdoor unit directly behind it on the external side of the same wall. This setup minimises the amount of pipework and ducting required, making installation faster and more affordable.
Understanding Back-to-Back Installation
Back-to-back installation of an air conditioning unit refers to a method where the indoor unit is installed inside the room, and the outdoor unit is mounted directly on the external side of the same wall. This approach is particularly advantageous for homes or offices with limited space, as it reduces installation time and material costs.
The main reason back-to-back installations are preferred is due to their reduced installation costs and fewer materials required to complete the job. The pipework and electrical connections run directly through the wall, making this setup simple and efficient.
Types of Back-to-Back Installations for Split System Air Conditioners
Straight Back-to-Back Installation
This is the most straightforward and commonly used setup in the air conditioning industry. The indoor unit is mounted on an interior wall, while the outdoor unit is placed directly behind it on the exterior side of the same wall. The pipework runs directly out the back of the indoor unit to the outdoor unit. This type of installation is the most cost-effective and is included in most standard quotes.
Back-to-Back Installation with Side Entry
In this variation, the indoor unit is placed on an internal wall rather than an external one. The ducting runs through the side of the indoor unit, through the wall, and connects to the outdoor unit placed on an external wall. Although this requires slightly more ducting than a straight back-to-back installation, it is still classified as a back-to-back setup.
Above Window Installation for Air Conditioning Unit
Sometimes, homeowners prefer to have the indoor unit placed above a window. This setup is possible as long as there is enough space between the window and the ceiling. In this case:
- The pipework runs out the back of the indoor unit.
- Ducting is installed along the exterior wall to reach the outdoor unit, which is often placed below or beside the window.
While this variation may require additional ducting and pipework, it is still considered a back-to-back installation as the indoor and outdoor units remain on the same wall.
Benefits of Back-to-Back Installation
Cost-Effective Installation
One of the primary benefits of back-to-back installation is its affordability. Since this setup requires fewer materials (such as pipework and ducting) and less labour, it is a cost-effective option for most homeowners. The straightforward nature of the installation process also ensures quicker completion times.
Space-Saving Design
This type of installation is ideal for homes or offices with limited space, as it keeps both units close together on the same wall. It does not require additional modifications, such as ceiling work or extensive piping, which can be necessary for other installation methods.
Back-to-Back Installation vs. Traditional Installation
Key Differences
When comparing back-to-back installation to traditional installation methods, there are several key differences:
- Positioning:
Back-to-back installations involve mounting the indoor and outdoor units on the same wall (internal and external sides, respectively).
Traditional installations may require units to be placed further apart, often on different walls or even separate areas of the building.
- Pipework and Ducting:
Back-to-back installations require minimal pipework and ducting.
Traditional installations often require additional materials and labour, which leads to increasing costs.
- Drain Pump Usage:
A drain pump is not required for back-to-back installations, as gravity typically facilitates drainage. However, traditional installations may require a drain pump when the indoor unit is positioned far from the outdoor unit.
- Installation Cost:
Back-to-back setups are more affordable due to reduced material and labour cost requirements.
What is Not a Back-to-Back Installation?
If the indoor unit is placed on an internal wall and the outdoor unit needs to be installed on a separate external wall, this requires additional modifications, such as:
- Pipework running through the ceiling or along walls to reach the outdoor unit.
- A drain pump to remove condensation in cases where gravity drainage is not possible.
Since this setup involves more materials and labour, it is not classified as a back-to-back installation and will incur additional costs.
Key Takeaways for Air Conditioning Service
- Back-to-back installations keep the indoor and outdoor units on the same wall, making them more affordable and easier to install.
- Variations like side-entry and above-window installations may require extra ducting but are still considered back-to-back.
- Non-back-to-back installations involve internal wall placements with extensive piping, ceiling work, or drain pumps, leading to higher costs.
Final Thoughts
Back-to-back air conditioning installations are ideal for those seeking an efficient and budget-friendly way to install a split-system unit. If you’re considering this type of installation but need clarification on whether it fits your setup, feel free to contact us. Our Brisbane air conditioning licensed electricians are happy to assess your space and provide a tailored solution.
