WaiWela Quality Tankless Water Heaters
 
Gas Line Sizing

Maximum Delivery Capacity of Cubic Feet of Gas Per Hour of IPS Pipe Carrying Natural Gas of 0.60 Specific Gravity

(Based on a Pressure Drop of 0.5 Inch Water Column)

Common Vent Capacity - Type B Double Wall Vent

Gas Pipe Sizing Guide

Maximum Capacity of Pipe in Thousands of BTU per Hour of Undiluted Liquified Petrolium Gases (LPG)

(Based on a Pressure Drop of 0.5 Inch Water Column) Low Pressure 11" Water Column