Understand the key variables that influence the price of a hot water heater installation. Costs are largely determined by the unit's fuel type (gas or electric), size, and brand. Crucially, complex installations, such as converting to tankless or needing plumbing/electrical code upgrades, can significantly increase labor costs, which make up about half the total investment. https://www.amenify.com/blog/water-heater-replacement-cost-installation-prices-guide