Gas hot water system technology consists of two parts: the gas boiler and the water tanks. The gas boiler uses long pieces of copper tubing that absorb the heat of the water that passes through it. This heat transfers to the water inside the coil, generating hot water. The gas boiler also includes a separate storage tank.
The gas boiler uses propane or natural gas to heat the water. The gas supply pipe, which may be made of steel black pipe, feeds into a gas regulator. The gas regulator has a thermostat and controls the temperature of the water heater. A secondary tube in the tank supplies gas to a pilot light. This pilot light ignites the burner when needed.
The capacity of the hot-water system refers to the capacity of the burner and the heat storage capacity. Burner capacity refers to the maximum amount of heat that the system can produce from a given amount of fuel. It is the practical limit of the system’s output. If the fuel rate is increased, the system’s capacity will be equal to the amount of fuel used.
Water use for hot water has fallen over the past decade, and that trend is expected to continue. This is a result of ongoing government regulations, residential building standards, and energy efficiency policies. The use of hot water has also been reduced by water restrictions and system conversions. These factors have all helped to reduce the carbon footprint of our homes and the water we use for it.