HOT WATER HEATING

Gas hot water heaters tend to have a higher initial cost compared to electric water heaters however gas heaters are less expensive to run monthly due to the low cost of natural gas. Natural gas heater uses more energy to operate  The gas byproduct takes some of the heat and energy with it, making it less efficient than other water heaters

also known as on-demand or instantaneous water heaters, only heat water when it is needed and avoid heat loss through the tank walls and water pipes. Tankless water heaters are more expensive to buy, but use less energy than storage natural gas water heaters, and reduce operating costs by about 30%

Advantages of an electrical hot water tank include its relatively low upfront cost. Additionally, electric hot water tanks are generally more energy-efficient than gas-powered tanks, and can be installed in multiple locations. However will be more expensive to run monthly. if your thinking of converting to an electric hot water heater keep in mind they can not provide the same volume of hot water all at once, and may need a larger tank. 

The primary advantage of a power vent is that the water heater can be located in any area and does not require a vertical vent or chimney.

Power vent hot water heaters tend to be more energy efficient than the natural draft heater and have a higher hot water capacity. Still, they also tend to have a higher initial cost and require a power supply