The Desa website features a section that allows users to search for dealers and service centers licensed to sell Desa gas heaters and parts. Parts can also be purchased online through parts resellers such as Desa Parts and Hearthside Hearth and Grill Sales as well as through online auction sites.
Hearthside Hearth and Grill Sales allows users to order replacement parts by selecting the model of heater. This launches a page that displays all currently stocked replacement parts, which can be added to the user's online shopping cart for purchase. All sales through the site are final, and parts cannot be returned as of March 2015.
Listings on eBay are created by both private sellers and businesses, most of which do not have a direct manufacturer connection to guarantee supply. As such, the parts and heaters available through the site vary on a regular basis. Users looking for a specific part or model of Desa gas heater can create customized searches and set up an alert system to notify them when a new listing meets the search criteria. These searches can include criteria about the item as well as the listing itself, such as only displaying results with pictures or with immediate purchase options.