Adam2 Posted October 25, 2019 Share Posted October 25, 2019 Planning the opening size for the above and wondered if you insulate these ducts through the opening up to the outer skin of the house or just to the inner skin. So if I have 150mm duct is the hole 150-160mm or more like ~180mm to allow for some insulation? Build is ICF if that makes a difference. Link to comment Share on other sites More sharing options...
Adam2 Posted October 28, 2019 Author Share Posted October 28, 2019 In case of help to anyone in future - recommendation from supplier is insulate from the mvhr unit to the internal wall face so a 150mm duct would need ~160mm hole Link to comment Share on other sites More sharing options...
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