Oversizing HVAC and refrigeration equipment might seem like the “safe” choice—but it can quietly destroy efficiency, product quality, and component life. In this episode of Taking the Temperature of HVACR, Jamie Kitchen, John Broughton, and Jörg Saar discuss how to properly size compressors, evaporators, condensers, valves, and piping; what really happens when systems are too big or too small; and why balance points, humidity control, and ambient conditions matter more than most people think. Packed with real-world examples—from flower rooms and walk‑in coolers to grain drying and variable‑speed systems—this conversation shows why “don’t oversize your equipment” is more than just a rule of thumb.