Free tools for finding the biggest leaks

Which tool should you use first?

If your bill jumped and you do not know why, start with the Energy Savings Calculator to estimate which upgrades have the fastest payback. If electronics, entertainment centers, or home-office devices stay warm while off, use the Dead Plug Detector to rank phantom loads before buying smart plugs.

For a guided path, pair the tools with the affordable smart thermostat guide, the motion sensor switch wiring guide, and the attic insulation utility bill fix.