Vacuum Cleaners Discussions

I wondered if its possible to use a HEPA filter day in a Dyson model which doesnt use a HEPA filter normally.  I made an enquiry about my DC04 model a few years ago and asked if I can put a HEPA filter in this machine as my DC04 doesnt come with a HEPA filter.  Dyson said no cos the motor in their 'Absolute' models has a slightly higher suck to it to cope with the HEPA filter media.   Has anyone heard of this before?   I didnt bother anyway but updated the filter to the yellow cartridge one as opposed to the horrible piece of cloth thing they had put in it as standard as that was letting out so much carbon dust.    Another thing is that I notice my machine lets out some carbon dust emissions - the back spine of the machine has black colour on it (the post motor filter is 7 years old) Dyson do claim it is lifetime.  Has anyone with a DC04 or any other model notice the carbon dust?