The Nilfisk IVB7 H and the IVB5 H and Nilfisk-Alto Attix 5 and Attix 7 Type H (High) filtration industrial vacuum cleaner washable pleated poly filter.
Andy actually prefers to fit these filters into the Nilfisk Grey-Line IVB5 M and the Nilfisk IVB7 M wet and dry industrial vacuum cleaner and the Blue-line Nilfisk-ALTO Attix 7 family of machines, as they cope better, with the fine dust, and some users, lack of attention to the filter cleaning regime.
According to EN 60335-2-69 The Terms "TYPE H" FILTRATION and HEPA FILTRATION are NOT INTERCHANGEABLE
The HEPA classification only considers the "efficiency of filtration" eg H10, H11, H12, H13, H14, U15, U17 NOT the SUITABILITY FOR USE with HAZARDOUS or COMBUSTIBLE dusts.
As it's light, maximise the saving on postage and buy some of the related parts below, such as a new hose, and some dustbags or a new floor tool or a round brush.
At the moment, standard postage within Australia is capped at a maximum of $20!