Tankless Water Heater Gas Supply Line Size

Branch 1 e tankless water heater 199 900 20 ft 1 g gas furnace 75 000 15 ft d branch main line 274 900 30 ft 1 branch 2 j gas dryer 25 000 20 ft h gas range 55 000 30 ft k gas logs 40 000 10 ft b c branch main line 120 000 45 ft main trunk a main trunk line 394 900 20 ft 1.

Tankless water heater gas supply line size.

Gallons per minute gpm is the key when it comes to sizing tankless water heaters. Tables 2 and 3 provide the capacity by pipe size and length based on the maximum allowable pressure drops. Typically the gas piping has to be upgraded to support the tankless water heater due to the volume of fuel that is required. Like a hot water tank for 5 people will require at least a 60 gallon tank.

In all cases a near 200 000 btu gas appliance will require a minimum of a inch gas supply line. Water heaters located in the garage may terminate on the garage floor with the same distance requirements cpc 505 6 cpc 505 4 508 5 608 5 t p does not discharge into a water heater drain pan. Cpc508 5 provide gas line sizing calculations and isometric riser diagram of the gas delivery piping system for the equipment with permit application. The right size is a tankless water heater that can heat enough gallons of water to a specific temperature per minute to keep up with the demand.