The tankless hot water heating system was a little more costly than these units, but they all worked under the same premise
We discussed installing a new hot water heater and I thought we should go bigger, and my fiance was adamant about keeping the same size we had now and maybe even going a little smaller. I hated that when I was taking a shower, I would often run out of hot water. I told him that was the reason I wanted a bigger water heater. Later that week, he brought home a bunch of paperwork and gave it to me. He told me to study through the paperwork and tell me what I wanted to do when I was done. I had paperwork on energy efficient electric hot water heaters. I had paperwork on electric hot water heaters and ones that were connected to the furnace, then at the bottom of the pile, I found reading material about a tankless water heater, there was no limit to how much hot water you can get from your tankless water heater! We can get small units that would go on to every faucet, which was known as hot water on demand, and within seconds of turning on the faucet, you would have hot water. The tankless hot water heating system was a little more costly than these units, but they all worked under the same premise. They were connected directly to your tepid water lines, and when hot water was called for within 2 to 3 minutes, it was coming from your faucet. There is no wasted energy trying to heat a big tank of hot water, because it was heating the water as needed. I wanted a large water heating system then, now I want a tankless water heater.