Summer in Texas hits hard — and when your A/C decides to start blowing hot air, it hits even harder. One moment you're standing in front of a vent expecting sweet relief, and the next you're wondering whether your A/C is working or if you're just imagining it. At Velocity Air A/C & Heating, we hear this complaint all the time, especially once temperatures reach “walking into a sauna” levels.

When it comes to your home’s HVAC system, size definitely matters — and not in the cheeky way you think. A system that’s too small will leave you sweating through Houston summers, and a system that’s too big will short-cycle, waste energy, and create hot-cold swings that drive homeowners crazy. Let’s break down how to choose the right size HVAC system — and why guessing based on your old system is one of the biggest mistakes homeowners make.