How to Choose the Right Aircon for Open-Concept BTO Layouts

Many BTO flat owners are increasingly favouring open-concept designs that combine the living, dining, and kitchen areas into a single, connected space.

While the layout creates a sense of openness and flexibility, it also changes how your aircon needs to work. Without walls to contain cool air within each zone, a system that handles a standard partitioned BTO flat perfectly may struggle to maintain consistent temperatures across your open-concept home.

Therefore, knowing what drives that challenge is the first step to choosing a system that actually works.

Why Open-Concept Layouts Are Challenging for Aircons

Open-concept spaces present several unique cooling challenges:

• No physical barriers: Without walls to contain cool air, your aircon has to work harder to maintain the desired temperature across the entire connected space. For instance, hot air from the kitchen can migrate freely into the living and dining areas, causing uneven cooling.
• Higher BTU requirements: An open-concept layout effectively functions as one large room. The combined space, therefore, requires significantly more BTU capacity than the individual zone sizes would suggest if calculated separately.
• Additional heat loads: The open concept introduces heat sources not present in a partitioned layout, such as cooking heat and multiple windows exposed to different sun angles. These add to the overall thermal load your system has to manage.
• Unpredictable airflow: Without walls to direct air circulation, dead zones can form in corners or areas far from the indoor unit, while spots directly in front of the unit may overcool. Achieving even temperature distribution requires both careful unit placement and accurate BTU sizing.

Aircon System Options for Open-Concept BTO Home Layouts

For an open-concept BTO, a multi-split system with at least two indoor units is the most effective solution.

A System 3 or System 4 setup lets you position multiple fan coil units across the open zone, creating overlapping cooling coverage across the connected space.

As a general rule, place the units so their coverage areas meet roughly in the middle of the zone, ensuring no section is left without adequate airflow. For instance, in most 4-room BTO open-concept layouts, two fan coil units dedicated to the living-dining-kitchen area provide even temperature distribution and eliminate hot spots.

Meanwhile, avoid relying on one powerful single-split unit for the entire open area. Even if the BTU rating appears sufficient on paper, a single point of cooling cannot distribute air evenly across a large, barrier-free space.

Consequently, some areas will feel comfortably cool while others remain warm, and adjusting the temperature setting will do little to fix the underlying distribution problem.

Calculating BTU Requirements for Open-Concept Spaces

Open-concept BTU sizing requires a different approach to a standard room:

• Treat the space as one large room: Measure the total square footage of the combined living-dining-kitchen area and base your BTU calculation on that single, larger figure, rather than calculating each zone separately.
• Add a buffer: Increase the standard BTU figure by 20 to 30% to account for the lack of walls containing cool air and the additional heat load from kitchen appliances and multiple windows.

Example:

If a standard 500 sq ft room requires approximately 12,000 BTU, the same 500 sq ft as part of an open-concept layout would need 14,000 to 15,000 BTU to compensate for the open layout factor.

Variables like ceiling height, floor level, window exposure, and cooking frequency all affect the final figure. As such, consider consulting an aircon specialist like 81 Aircon to get an accurate BTU calculation, ensuring your system is correctly sized for your BTO layout and cools efficiently from the start.

Get Expert Advice from 81 Aircon for Your BTO

Open-concept BTOs and apartments require more than a standard system recommendation. Instead, the system configuration and BTU sizing need to account for the specific challenges of a barrier-free space, and unit placement matters just as much as capacity.

At 81 Aircon, our technicians are experienced with BTO installations across a range of layouts and can assess your floor plan to recommend the right system and BTU sizing for your open-concept home. Additionally, we accept Climate Vouchers, making it even more affordable for you to invest in a higher-efficiency unit.

So, as you plan your BTO aircon installation, contact us for a free consultation and get an accurate BTU assessment tailored to your open-concept layout today.

Check out our aircon promotions for energy-efficient 5-tick systems and buy an aircon system to get started.