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NG Supply for tankless HWH
I was looking in to tankless hot water heaters and my current NG supply lines. I have a 250 CFH regulator with 1.5" pipe feeding a 196K BTU steam boiler and a 3/4" line going to my existing hot water heater and Pro range.
Do I need to size my NG supply for everything running at once? I would need:
199k Tankless WH
100k Range (4x 18k burners, 25k oven)
That seems like a lot...would my current setup work?