One year on from first install, I set about servicing my MVHR today.  Aside from cleaning and replacing the filters, this is the first action I've undertaken with the MVHR.    First off, the front cover is secured in place by a series of screws with a mortorq head. Quite why they have used these rather than the Philips head used elsewhere, I'm not quite sure.   Fortunately, I had the appropriate bit, but unfortunately, the screw heads are that soft that one of them stripped.