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.
Gas-fired water heaters require a mechanical permit and electrical water heaters need a plumbing permit to ensure that the unit is installed properly with a temperature and pressure relief valve, the valve has an attached drainpipe, and the entire system is installed in a safe location.
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.