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.
When shopping for your water heater, you'll want to check your state's requirements. Sears carries a number of gas water heaters that are compliant with California state laws. Even if you don't live in a state with specific requirements, you fan find a wide variety of options that will best suit your water usage needs.