difference between gas and electric tankless water heater
In most situations, an electric tankless water heater is a better choice than a gas unit due to their smaller size, lower cost, longer life, limited maintenance requirements, cheaper and easier installation, and much higher thermal efficiency (which off-sets the typically higher cost of electricity vs. natural gas). The relative cost of installation. 2  The difference in cost between an appropriately-sized electric and gas tankless water heater. 3  Water usage habits and needs. 4  Homeowner/ user preference. 5  The differential between electric costs and gas costs in your area, and your personal outlook for changes in such costs in the future.