Crumpetman Posted September 30, 2022 Share Posted September 30, 2022 Hi Bit of Newbie so might be a stupid question. The MVHR unit I have purchase has 180mm spigots would it be ok to reduce these to 150mm as this would allow me more options for air distribution box's? Many Thanks Andy Link to comment Share on other sites More sharing options...
JohnMo Posted September 30, 2022 Share Posted September 30, 2022 You would need to calculate the pressure drops over the system based on your flow requirements. So no easy yes or no I am afraid. You should be able to datasheet from the manufacturers website for ducts etc. You want as low a pressure drop as practical to fan speed down and noise. 1 Link to comment Share on other sites More sharing options...
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