In respect to being less efficient than other models heating wise all resistance heat strips would have the same power to btu ratio, 4.13 btu per watt . Reusing the heat in a basement with a clothesline and heat pump water heater seems to be a perfect way to reuse the heat while reducing the infiltration. I've seen inline dryer vent lint traps designed for scenarios without a proper vent to exterior. This could be applied the same way to a traditional dryer. You could then swap between venting depending on the season.
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