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2020 house and the tankless water heater is just plugged into a 110 outlet. Kinda surprising when I saw that. Also shoutout to the builder predicting that we'd want to replace every overhead light with a fan and using the correct boxes with two hot wires from the switch to handle that. Really appreciate it.

[teachrdan]

> replace every overhead light with a fan

What does this mean? Literally replacing all the overhead lights with a ceiling fan w/light attached?

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Yes we installed ceiling fans with lights in the bedrooms and living room. The smaller bedrooms (currently offices) have the light controlled by a switch next to the fan switch on the wall. This is because the fans we bought for rooms only use pull chains and have separate conductors for light and fan. The larger rooms have remote control fans so for now the control unit is switched from the wall and then the fan speed and light is controlled by the fan's remote. I actually hate this arrangement and am going to do some splicing of the fan's wires and expanding the switch box in the largest bedroom so I can control the light from a normal switch.

All the overhead lights outside of the kitchen and showers were cheap "boob lights." The kitchen and shower lights are LED pucks that mount flush to a shallow box and kind of look like recessed lights. First we replaced all of the boob lights with wider LED panel lights with a warm color temperature. While doing this I noticed something about the light boxes in the centers of the living room and bedrooms: the boxes were mounted so they are centered over a joist, meaning you can screw a fan directly into the joist. They also had two hot conductors running from the switch box. One was colored red and the other was colored black. The red one was wired from the switch to the light, and the black one was capped at both ends. They were set up to have fans installed without any modification to the box.