This online calculator can be used as a screening tool to perform a rough calculation of the payback period for using aerosol-based duct sealing. The calculation assumes a leakage rate of 25 percent before treatment and 5 percent afterwards. 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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