Thermal King Windows has taken parts from all the top windows, eliminated everything that isn’t 100% optimal and engineered to be the best replacement windows in Kansas City and the only local window company that promises and delivers perfection. Not just great windows, also great service. Thermal King Windows are guaranteed to never stick, rot, warp, fade, or fail. In fact, if they do, we will replace it… PERIOD. Our windows are easy to clean, always look new, and require practically no maintenance.