Based on my experience with aircon installations in Singapore, it's crucial to be vigilant about what is included in your service agreement. Many people overlook the fine details, such as whether the aircon units themselves are part of the deal or just the piping and trunking work. In one case, a property owner called a company to install aircon piping and trunking, only to find out later that the actual aircon units were missing. This resulted in extra expenses and delays because they needed to purchase and install the units separately. It's common for scammers or unreliable contractors to take payment for piping works without completing the full installation, leaving customers frustrated. To avoid this, always ask for a clear, itemized breakdown of costs and confirm what you are paying for—whether it's just the piping or also the aircon units. Get everything in writing and verify the installation schedule to avoid long delays or excuses. Additionally, check reviews and feedback from previous customers before committing to a contractor. Another tip is to be cautious with low quotes that seem too good to be true. Sometimes paying a bit more upfront with a reputable company can save you thousands in unexpected costs later. Also, ensure that your contractor is responsive and communicates clearly. Poor communication and delayed responses are warning signs. In my case, after experiencing slow responses and missing equipment issues with one installer, I decided to look for trusted professionals who guaranteed timely completion and included all necessary components. This prevented me from incurring hefty extra charges and made moving into my new place stress-free. In summary, protecting yourself from aircon scams involves detailed contract scrutiny, choosing reliable installers, clear communication, and transparent pricing to avoid surprises.