Comfort Systems of Duluth, MN, has been serving its community proudly by offering the following services: Water treatment and distribution Sump pump grant program Natural gas detection Natural gas service Natural gas appliance repair Home energy check ups Storm water systems Sanitary sewage collection We also repair Natural Gas Furnaces, Water Heaters, Boilers, and Stoves. Need help after hours? No, worries! We have a 24-hr emergency response service available to you.Call today to learn more!