Alexphd1 Posted March 6, 2019 Share Posted March 6, 2019 (edited) I need to run the pipes from the unit out to the soffits. I have 160mm female EPS connections. Options are to reduce to 150mm and use plastic or galv metal or use the expensive pre insulated 160mm EPS pipe (verplas) . Any pros or cons in each pipe material . I am spraying open cell insulation afterwards so non insulated pipe is not a major disadvantage. This is a diy system with the mvhr units bought cheap from fleebay. Edited March 6, 2019 by Alexphd1 Link to comment Share on other sites More sharing options...
jack Posted March 10, 2019 Share Posted March 10, 2019 Open cell insulation won't be ideal as water vapour can get through it and condense on the ducts. I have some 180 or 160 closed cell ducting left over from my own MVHR installation if you want it. Let me know and I'll go measure it. Link to comment Share on other sites More sharing options...
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