Chablais Posted January 27, 2020 Share Posted January 27, 2020 Hi Folks So i am about halfway through my MVHR install, using 92mm semi rigid ducts from Hybalans. Does anyone know if the Ubbink ducting usually listed as 90mm is actually the same? The fiitings all look very similar, and I would have thought that there are not that many actual manufactures of the ducting. I purchased tow50m rolls and thought it would be enough, wrong! I need approx 40m more, and the Ubbink stuff is circa £160.00 per 50m roll, versus the HB+ at circa 275.00 so quite a saving. Anyone any tips on using EPP 180mm dia ducst for the initial input and exhaust from the unit/ Thanks Andy Link to comment Share on other sites More sharing options...
JOE187 Posted January 27, 2020 Share Posted January 27, 2020 HI Think ubink is 90 ext and 75 int from the specifications! Inner size needs to be same as yours? Link to comment Share on other sites More sharing options...
Chablais Posted January 27, 2020 Author Share Posted January 27, 2020 I think it is more important that the outer matches, as this is how it seals, with a flexiring around the grooves into a socket. Link to comment Share on other sites More sharing options...
le-cerveau Posted January 28, 2020 Share Posted January 28, 2020 They are compatible, see the end of my blog entry. Link to comment Share on other sites More sharing options...
Chablais Posted January 28, 2020 Author Share Posted January 28, 2020 Fantastic, thank you for such an informative, detailed and useful blog post. I hope I can achieve such a good outcome! Link to comment Share on other sites More sharing options...
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