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What do you pros do when it comes to gas piping in homes. Do you size the main off the meter for full load potential?
Scenario is as follows: NG
Existing main off of meter to house is 3/4" 60' run gives 85 CFH the home only has a gas water heater with a load of 40 CFH, and a stub for a gas dryer.
New HO is doing away with electric BB heat, and installing a FA 110k btu furnace.
Gas cook top, gas dryer, keeping gas WH, And stub for an outdoor grill
Dryer needs 30 CFH
Wh. 40 CFH
Furnace 110 CFH
Cook top 42 CFH
Hook up for outdoor BBQ. 60 CFH
Total CFH potential 272
Granted the odds of all appliances running at the same time are low, but the chance does exist.
I'm not involved doing the furnace, but this guy wants to tie into the 3/4" existing for his furnace. I told him the gas needs to be up sized from 3/4 to 1 1/4" to the house to get the proper CFH to ALL appliances being installed. Even if nothing else were going to be gas but the furnace, and wh he still needs a bigger gas line.
Where do they come from??