Losch Boiler Although the Losch Boiler was built over 30 years ago, there are still many in operation today. Providing comfortable coal heat. Losch Plumbing and Heating still services Losch Boilers and still stocks almost all parts for the Losch Boiler. Our service department can rebuild the famous Losch water cooled grate and stoker system, from the smallest 9" grate to the largest 96" commercial grate.