To present a slide show I downloaded the Chrome browser. to show the browser screen on the Chromecast receiver monitor/TV. For the slideshow I added the Chrome browser iSlide extension. I found that I could not use it directly to present a folder of photos on the laptop.
Check for local requirements. To have a gas water heater, you will need a supply of gas. If you are going to install gas piping or change the gas piping you already have, a separate gas-piping permit must be obtained. The gas piping must not block the removal of the tank. Always adhere to the manufacturer's installation instructions.
Local Codes. While the NEC does not require a water heater breaker for a home without an electric water heater, local codes may require a breaker to be installed for an electric model, even if not used. The reason for this is simply to ensure a house has a complete electrical system for all possible situations.