The fan units in these have very little margin. You could probably get away with extending the outlt hose to 10 feet or so, but 15 would be pushing it a bit. Reducing the size of the pipe has a much worse choking effect than extending the length so i wouldnt recommend that at all. Do you have an...
WDM120 stopped spinning a few weeks ago. Eventually found a dry soldred joint on module, fixed and hey presto worked fine again. 2 days ago motor stopped running at all. Rest of machine works according to programme but when motor asked to run it just jerks a bit. Suspected moduleso renewed it...