This calculator determines the energy consumption and payback period for standard commercial and ultra-efficient commercial condensing water heaters and compares them with consumption and payback for residential models. By necessity, this screening model makes simplifying assumptions, so use it for initial screening only. For more accurate performance predictions, conduct a more detailed analysis that includes additional factors such as actual usage patterns, hot water loads, and part-load performance of equipment.
The values already entered in certain cells are examples, generally using national average data. Replace them with values that correspond to your own situation (for instance, if you know it, enter your actual electricity cost in $/kWh).
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