Years ago on our blog, we warned customers about the dangers of purchasing HVAC equipment online. There are plenty of reasons for this, such as getting a system with a voided warranty. A common item people purchase on their own is high-tech thermostats, thinking they can’t go wrong with basic climate controls. Unfortunately, a mismatched HVAC system and thermostat can end up damaging the HVAC system.
But the most important reason to never purchase HVAC equipment online is the issue of sizing. Unless you’re a professional HVAC technician, you won’t know how to properly size a new air conditioner to work correctly for your house. Sizing must be precise. A system that’s too large or too small means years of trouble from an AC that never seems to work right.