Direct answer
Tightly sealed homes need mechanical ventilation. Partner-network installers design every project with a balanced ventilation strategy, typically a heat recovery ventilator (HRV) or energy recovery ventilator (ERV). Without it, air quality declines.
Authoritative sources
DOE Energy Saver guide to insulation types, R-values, and recommended applications.
Energy Efficient Home Improvement Credit, up to $1,200/yr for qualifying insulation work.
Energy Star recommendations for attic and wall insulation R-values by climate zone.
Related questions
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