General description vhbw offers a clever solution with this G4 exchange filter set, designed specifically for your geothermal heat exchanger. These coarse dust filters effectively remove hair, insects, sand, and other coarse dust from the air, ensuring a clean and allergy-friendly environment in your home. Technical specifications Dimensions (L x W x H): 37 x 25 x 2.4 cm Filter class: G4 Material: polypropylene Colour: white Weight: 111 g Compatibility and accessories Replacement for: Pluggit SWTG4-S Not compatible with: Pluggit SWT180-1 Installation The filters can be inserted quickly and without tools into the insertion shaft of the heat exchanger. Usage To maintain high filter performance, it is recommended to change the filters regularly.