Broan Nutone 1 Year Supply Filter Kit Includes 2 Pre Filters & 1 HEPA Filter Fits GSFH1K Guardian Plus, Compare to Part # ACCGSFHP2, Designed & Engineered by Crucial Air, Model: , Hardware Store. Braon Nutone 1 year supply filter kit. This kit includes 2 pre filters & 1 HEPA filter. Compare to part # ACCGSFHP2. Fits the following Broan Models: HF 1.0, HF 2.0, HF 3.0, HF 3.1, HR 2.5 & HR 2.6. Designed & Engineered by Crucial Air.