A natural gas water heater has a large metal exhaust pipe attached directly to the top center of the water heater. This exhaust protrudes straight up through the ceiling above. A gas water heater also has a yellow or gray flexible hose leading from a black pipe to the bottom center of the water heater. Electric water heaters have neither of these characteristics and will instead have a piece of flexible conduit leading into the top of the heater. In the Collin and Denton County areas of North Texas, we are a natural gas market. About 99% of water heaters here are gas-powered. That includes Frisco, McKinney, Plano, Allen, Little Elm, Prosper, and the surrounding areas. That means there are very few electric water heaters and even fewer propane water heaters here. Electric water heaters are a little more common in commercial or business environments or homes that: -Were built in the 1980s or earlier -Are under 2,300 sq ft -Have just a single water heater in place If you are one of the rare few homeowners that don’t have a natural gas water heater, please communicate this to your point of contact early in the process.