The major drivers of future-proofed HVAC systems are efficiency, resiliency, electrification, and grid-interactivity. Efficiency has been around as long as HVAC systems have. A more recent trend has been pushing the industry more towards electrification, including heating and the move to heat pumps. While a major focus of the past was reliability, today the focus has evolved to include resiliency. The latest driver is grid interactivity. This article will touch on all of these points and the components that tie into them.