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Over the stairs return grille:
2nd bathroom return grille while checking air speed:
Kids bedroom supply grille:
Bedroom supply grille:
Supply and return chimneys construction (you can see the IKEA bowls I used as caps)
Roof installation:
Inside ductwork to the HRV (from bathroom and kitchen and to livingroom)
Bathrooms return plenum with spiraled tube attached to the HRV:
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