A Productive Rant About gas heater vs electric heater
https://waylonyylr.bloggersdelight.dk/2020/11/26/does-your-high-efficiency-gas-furnace-pass-the-test-7-things-you-can-improve-on-today/
gas water heater 30 gallon: 10 Things I Wish I'd Known Earlier. 10 No-Fuss Ways to Figuring Out Your high efficiency condensing furnace. 7 Little Changes That'll Make a Big Difference With Your high efficiency