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- [doc] Updates to residential energy efficiency submittal requirements — Portland updated residential energy efficiency submittal requirements in February 2022 to require plans specifying whether HVAC duct systems and equipment are located within the building thermal enve…
- [doc] Updates to residential roof ventilation submittal requirements — Portland updated residential roof ventilation submittal requirements effective February 16, 2022, requiring specification of ventilation rates, calculations of minimum vent areas, and vapor retarder…
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Parent: ← News