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Right - The energy recovery ventilator ducts supply filtered outside air to multiple locations in the home and continuously exhaust stale air to provide clean, balanced ventilation.
Right – Open-cell spray foam is installed over closed-cell spray foam in this hybrid approach to achieve adequate attic ventilation while allowing some vapor permeability.
Right – Spray foam fills the roof joist cavities of this vaulted, unvented attic.
The spray foam-insulated attic provides a temperate place for the ERV ducts, which provide filtered fresh air to every room in the house.