System 1, 2, 3 or 4? Choosing the Right Aircon System for Your Home
If you’ve shopped for an aircon in Singapore, you’ve seen “System 3” and “System 4” everywhere, usually next to a price that seems too good. Here’s what those numbers actually mean, and how to pick the right one without overpaying. What does “System” mean? The number is how many indoor units (fan coils) share one…






