ANSI Z21.20-2013 Automatic Electrical Controls for Household and Similar Use - Part 2-5: Particular Requirements for Automatic Electrical Burner Control Systems
2013ANSI Z21.20-2013 Automatic Electrical Controls for Household and Similar Use - Part 2-5: Particular Requirements for Automatic Electrical Burner Control Systems
2007ANSI Z21.20-2007 Particular Requirements for Automatic Burner Ignition Systems and Components, Part 2