Discontinued Therm & Gas Tankless

Determining the elevation limit of your 345/450 ESR or 715/C 800 ES

FD Code 886 or lower - unit approved for elevations up to 4,500'

FD Code 887-891 - NG unit approved for elevations up to 8,000'

FD Code 887-891 - LP unit approved for elevations up to 4,500'

FD Code 892 or higher - LP and NG units approved for elevations up to 8,000'

Here is the example of FD Plate Code No. (JPG 0.2 MB)