If you choose to go with the Buderus G115WS oil boiler, you will need to purchase the oil burner kit. The burner selection is listed under the accessory tab. You can also purchase a thermostat, expansion tank, pumps, and a fill valve among other accessories.
Please contact us and we will be happy to discuss your specific application and help you to select the appropriate materials. You may also want to take a look at our hydronic system accessory guide.