The Energy Detective or TED makes whole house monitors, the current model is the 5000 (+ a letter). They also made an earlier model that was more basic, the 1001. I have purchased a model 1001 new on Ebay for about $25, although currently it's listed around $55. It's not quite as easy to use as a Kill-a-watt, but it's induction clamps can be moved to different circuits around your panel.
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