DECISION LIBRARY
Expensive energy choices, tested honestly
Each guide begins with a household decision, identifies the evidence needed, and shows when energy savings are insufficient to justify replacement.
Keep an old refrigerator or replace it?
Use measured or EnergyGuide annual consumption, comparable capacity, and the correct avoidable purchase cost.
Open decision guide →02Standard or heat-pump electric dryer?
Compare model-specific annual energy, net price difference, load capacity, cycle time, installation, and ownership horizon.
Open decision guide →03Standard or heat-pump electric water heater?
Reprice the savings benchmark, compare installed bids, and verify space, condensate, sound, and hot-water recovery.
Open decision guide →THE STANDARD
No verdict without comparable service
The library does not substitute a generic percentage for a proposed product. Every decision uses user-entered or source-linked energy consumption, cost from today, and a realistic ownership horizon. If capacity, output, or workload differs, the calculator reports costs but withholds a payback verdict until the user confirms a common service basis.