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Simple passive house renovation techniques including continuous insulation, sealed walls, and triple pane windows can transform an old, drafty house into an energy efficient structure, according to a CNN report. Passive house design principles emphasize an airtight space with fresh air filters to preserve indoor air quality.
The techniques can significantly reduce or even eliminate the need for a heating system, the report says. CNN interviewed a New York architect working on passive house renovations in New York City. The return on investment typically takes between two and five years for this type of retrofit, the report says.
