Intertherm furnace filters, as well as filters compatible with Intertherm models, are sold online through mobile home supply stores such as Magic Mobile Home Supply, specialty filter suppliers such as Filter USA and online auction sites such as eBay. The Intertherm website also contains a tool for locating local dealers.
The Magic Mobile Home Supply website allows users to browse through a wide range of furnace parts and supplies, including replacement filters for Intertherm / Nordyne furnaces. Each listing contains a product description that covers the item's dimensions and relevant specifications, the part number for each item and any notes about the product from the manufacturer. Listings also feature pricing and shipping details, as well as options to share the item via email or on various social media platforms.
Listings on eBay contain information of varying quality, as the site does not place any minimum requirements or reviews on the details provided by sellers. To offset this, it does feature a complex seller rating system based on feedback from the seller's past customers. While this feedback does not always cover information on specific items, it does allow buyers to gauge the trustworthiness of the seller and become aware of any patterns in behavior that could affect the sale.