Whoever spends money on machines like a generator, wants to have a long warranty period so that the company can help them if something goes wrong with the generator. Firman, as a company, provides great quality of its products and gives you a decent guarantee on the generator. If you purchase any of Firman generators, you will get a 3-year limited warranty if you are using it for residential purposes and if you are using the Firman generator for commercial reasons, the warranty will last for 90 days only.